svn commit: r685009 [5/6] - in /hadoop/hbase/trunk: ./ src/java/org/apache/hadoop/hbase/ src/java/org/apache/hadoop/hbase/client/ src/java/org/apache/hadoop/hbase/ipc/ src/test/org/apache/hadoop/hbase/client/

[ji...@apache.org]

Modified: hadoop/hbase/trunk/src/java/org/apache/hadoop/hbase/client/HTable.java
URL: http://svn.apache.org/viewvc/hadoop/hbase/trunk/src/java/org/apache/hadoop/hbase/client/HTable.java?rev=685009&r1=685008&r2=685009&view=diff
==============================================================================
--- hadoop/hbase/trunk/src/java/org/apache/hadoop/hbase/client/HTable.java (original)
+++ hadoop/hbase/trunk/src/java/org/apache/hadoop/hbase/client/HTable.java Mon Aug 11 17:55:22 2008
@@ -1,1408 +1,1408 @@
-/**
- * Copyright 2008 The Apache Software Foundation
- *
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.hadoop.hbase.client;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.hbase.HBaseConfiguration;
-import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.HRegionInfo;
-import org.apache.hadoop.hbase.HRegionLocation;
-import org.apache.hadoop.hbase.HServerAddress;
-import org.apache.hadoop.hbase.HTableDescriptor;
-import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitor;
-import org.apache.hadoop.hbase.filter.RowFilterInterface;
-import org.apache.hadoop.hbase.filter.StopRowFilter;
-import org.apache.hadoop.hbase.filter.WhileMatchRowFilter;
-import org.apache.hadoop.hbase.io.BatchUpdate;
-import org.apache.hadoop.hbase.io.Cell;
-import org.apache.hadoop.hbase.io.RowResult;
-import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.util.Writables;
-import org.apache.hadoop.io.Text;
-
-/**
- * Used to communicate with a single HBase table
- */
-public class HTable {
-  private final HConnection connection;
-  private final byte [] tableName;
-  private HBaseConfiguration configuration;
-
-  /**
-   * Creates an object to access a HBase table
-   *
-   * @param tableName name of the table
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public HTable(final Text tableName)
-  throws IOException {
-    this(new HBaseConfiguration(), tableName.getBytes());
-  }
-
-  /**
-   * Creates an object to access a HBase table
-   *
-   * @param tableName name of the table
-   * @throws IOException
-   */
-  public HTable(final String tableName)
-  throws IOException {
-    this(new HBaseConfiguration(), Bytes.toBytes(tableName));
-  }
-
-  /**
-   * Creates an object to access a HBase table
-   *
-   * @param tableName name of the table
-   * @throws IOException
-   */
-  public HTable(final byte [] tableName)
-  throws IOException {
-    this(new HBaseConfiguration(), tableName);
-  }
-
-  /**
-   * Creates an object to access a HBase table
-   * 
-   * @param conf configuration object
-   * @param tableName name of the table
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public HTable(HBaseConfiguration conf, final Text tableName)
-  throws IOException {
-    this(conf, tableName.getBytes());
-  }
-
-  /**
-   * Creates an object to access a HBase table
-   * 
-   * @param conf configuration object
-   * @param tableName name of the table
-   * @throws IOException
-   */
-  public HTable(HBaseConfiguration conf, final String tableName)
-  throws IOException {
-    this(conf, Bytes.toBytes(tableName));
-  }
-
-  /**
-   * Creates an object to access a HBase table
-   * 
-   * @param conf configuration object
-   * @param tableName name of the table
-   * @throws IOException
-   */
-  public HTable(HBaseConfiguration conf, final byte [] tableName)
-  throws IOException {
-    this.connection = HConnectionManager.getConnection(conf);
-    this.configuration = conf;
-    this.tableName = tableName;
-    this.connection.locateRegion(tableName, HConstants.EMPTY_START_ROW);
-  }
-
-  /**
-   * @param tableName name of table to check
-   * @return true if table is on-line
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public static boolean isTableEnabled(Text tableName) throws IOException {
-    return isTableEnabled(tableName.getBytes());
-  }
-  /**
-   * @param tableName name of table to check
-   * @return true if table is on-line
-   * @throws IOException
-   */
-  public static boolean isTableEnabled(String tableName) throws IOException {
-    return isTableEnabled(Bytes.toBytes(tableName));
-  }
-  /**
-   * @param tableName name of table to check
-   * @return true if table is on-line
-   * @throws IOException
-   */
-  public static boolean isTableEnabled(byte[] tableName) throws IOException {
-    return isTableEnabled(new HBaseConfiguration(), tableName);
-  }
-  
-  /**
-   * @param conf HBaseConfiguration object
-   * @param tableName name of table to check
-   * @return true if table is on-line
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public static boolean isTableEnabled(HBaseConfiguration conf, Text tableName)
-  throws IOException {
-    return isTableEnabled(conf, tableName.getBytes());
-  }
-  
-  /**
-   * @param conf HBaseConfiguration object
-   * @param tableName name of table to check
-   * @return true if table is on-line
-   * @throws IOException
-   */
-  public static boolean isTableEnabled(HBaseConfiguration conf, String tableName)
-  throws IOException {
-    return isTableEnabled(conf, Bytes.toBytes(tableName));
-  }
-
-  /**
-   * @param conf HBaseConfiguration object
-   * @param tableName name of table to check
-   * @return true if table is on-line
-   * @throws IOException
-   */
-  public static boolean isTableEnabled(HBaseConfiguration conf, byte[] tableName)
-  throws IOException {
-    return HConnectionManager.getConnection(conf).isTableEnabled(tableName);
-  }
-  
-  /**
-   * Find region location hosting passed row using cached info
-   * @param row Row to find.
-   * @return Location of row.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public HRegionLocation getRegionLocation(final Text row)
-  throws IOException {
-    return connection.getRegionLocation(tableName, row.getBytes(), false);
-  }
-
-  /**
-   * Find region location hosting passed row using cached info
-   * @param row Row to find.
-   * @return Location of row.
-   * @throws IOException
-   */
-  public HRegionLocation getRegionLocation(final String row)
-  throws IOException {
-    return connection.getRegionLocation(tableName, Bytes.toBytes(row), false);
-  }
-
-  /**
-   * Find region location hosting passed row using cached info
-   * @param row Row to find.
-   * @return Location of row.
-   * @throws IOException
-   */
-  public HRegionLocation getRegionLocation(final byte [] row)
-  throws IOException {
-    return connection.getRegionLocation(tableName, row, false);
-  }
-
-  /** @return the table name */
-  public byte [] getTableName() {
-    return this.tableName;
-  }
-
-  /**
-   * Used by unit tests and tools to do low-level manipulations.  Not for
-   * general use.
-   * @return An HConnection instance.
-   */
-  public HConnection getConnection() {
-    return this.connection;
-  }
-
-  /**
-   * @return table metadata 
-   * @throws IOException
-   */
-  @Deprecated
-  public HTableDescriptor getMetadata() throws IOException {
-    return getTableDescriptor();
-  }
-
-  /**
-   * @return table metadata 
-   * @throws IOException
-   */
-  public HTableDescriptor getTableDescriptor() throws IOException {
-    return new UnmodifyableHTableDescriptor(
-      this.connection.getHTableDescriptor(this.tableName));
-  }
-
-  /**
-   * Gets the starting row key for every region in the currently open table
-   * 
-   * @return Array of region starting row keys
-   * @throws IOException
-   */
-  @SuppressWarnings("null")
-  public byte[][] getStartKeys() throws IOException {
-    final List<byte[]> keyList = new ArrayList<byte[]>();
-
-    MetaScannerVisitor visitor = new MetaScannerVisitor() {
-      public boolean processRow(RowResult rowResult) throws IOException {
-        HRegionInfo info = Writables.getHRegionInfo(
-            rowResult.get(HConstants.COL_REGIONINFO));
-        if (Bytes.equals(info.getTableDesc().getName(), getTableName())) {
-          if (!(info.isOffline() || info.isSplit())) {
-            keyList.add(info.getStartKey());
-          }
-        }
-        return true;
-      }
-
-    };
-    MetaScanner.metaScan(configuration, visitor, this.tableName);
-    return keyList.toArray(new byte[keyList.size()][]);
-  }
-
-  /**
-   * Get all the regions and their address for this table
-   * 
-   * @return A map of HRegionInfo with it's server address
-   * @throws IOException
-   */
-  public Map<HRegionInfo, HServerAddress> getRegionsInfo() throws IOException {
-    final Map<HRegionInfo, HServerAddress> regionMap =
-      new TreeMap<HRegionInfo, HServerAddress>();
-
-    MetaScannerVisitor visitor = new MetaScannerVisitor() {
-      public boolean processRow(RowResult rowResult) throws IOException {
-        HRegionInfo info = Writables.getHRegionInfo(
-            rowResult.get(HConstants.COL_REGIONINFO));
-        
-        if (!(Bytes.equals(info.getTableDesc().getName(), getTableName()))) {
-          return false;
-        }
-
-        HServerAddress server = new HServerAddress();
-        Cell c = rowResult.get(HConstants.COL_SERVER);
-        if (c != null && c.getValue() != null && c.getValue().length > 0) {
-          String address = Bytes.toString(c.getValue());
-          server = new HServerAddress(address);
-        }
-        
-        if (!(info.isOffline() || info.isSplit())) {
-          regionMap.put(new UnmodifyableHRegionInfo(info), server);
-        }
-        return true;
-      }
-
-    };
-    MetaScanner.metaScan(configuration, visitor, tableName);
-    return regionMap;
-  }
-  
-  /**
-   * Get a single value for the specified row and column
-   * 
-   * @param row row key
-   * @param column column name
-   * @return value for specified row/column
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Cell get(final Text row, final Text column)
-  throws IOException {
-    return get(row.getBytes(), column.getBytes());
-  }
-
-  /** 
-   * Get a single value for the specified row and column
-   *
-   * @param row row key
-   * @param column column name
-   * @param numVersions - number of versions to retrieve
-   * @return value for specified row/column
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Cell[] get(final Text row, final Text column, int numVersions)
-  throws IOException {
-    return get(row.getBytes(), column.getBytes(), numVersions);
-  }
-
-  /**
-   * Get a single value for the specified row and column
-   * 
-   * @param row row key
-   * @param column column name
-   * @return value for specified row/column
-   * @throws IOException
-   */
-  public Cell get(final String row, final String column)
-  throws IOException {
-    return get(Bytes.toBytes(row), Bytes.toBytes(column));
-  }
-
-  /** 
-   * Get a single value for the specified row and column
-   *
-   * @param row row key
-   * @param column column name
-   * @param numVersions - number of versions to retrieve
-   * @return value for specified row/column
-   * @throws IOException
-   */
-  public Cell[] get(final String row, final String column, int numVersions)
-  throws IOException {
-    return get(Bytes.toBytes(row), Bytes.toBytes(column), numVersions);
-  }
-
-  /** 
-   * Get a single value for the specified row and column
-   *
-   * @param row row key
-   * @param column column name
-   * @return value for specified row/column
-   * @throws IOException
-   */
-  public Cell get(final byte [] row, final byte [] column)
-  throws IOException {
-    return connection.getRegionServerWithRetries(
-        new ServerCallable<Cell>(connection, tableName, row) {
-          public Cell call() throws IOException {
-            return server.get(location.getRegionInfo().getRegionName(), row,
-                column);
-          }
-        }
-    );
-  }
-
-  /** 
-   * Get the specified number of versions of the specified row and column
-   * @param row row key
-   * @param column column name
-   * @param numVersions number of versions to retrieve
-   * @return Array of Cells.
-   * @throws IOException
-   */
-  public Cell[] get(final byte [] row, final byte [] column,
-    final int numVersions) 
-  throws IOException {
-    return connection.getRegionServerWithRetries(
-        new ServerCallable<Cell[]>(connection, tableName, row) {
-          public Cell[] call() throws IOException {
-            return server.get(location.getRegionInfo().getRegionName(), row, 
-                column, numVersions);
-          }
-        }
-    );
-  }
-
-  /** 
-   * Get the specified number of versions of the specified row and column with
-   * the specified timestamp.
-   *
-   * @param row         - row key
-   * @param column      - column name
-   * @param timestamp   - timestamp
-   * @param numVersions - number of versions to retrieve
-   * @return            - array of values that match the above criteria
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Cell[] get(final Text row, final Text column,
-    final long timestamp, final int numVersions)
-  throws IOException {
-    return get(row.getBytes(), column.getBytes(), timestamp, numVersions);
-  }
-
-  /** 
-   * Get the specified number of versions of the specified row and column with
-   * the specified timestamp.
-   *
-   * @param row         - row key
-   * @param column      - column name
-   * @param timestamp   - timestamp
-   * @param numVersions - number of versions to retrieve
-   * @return            - array of values that match the above criteria
-   * @throws IOException
-   */
-  public Cell[] get(final String row, final String column,
-    final long timestamp, final int numVersions)
-  throws IOException {
-    return get(Bytes.toBytes(row), Bytes.toBytes(column), timestamp, numVersions);
-  }
-
-  /** 
-   * Get the specified number of versions of the specified row and column with
-   * the specified timestamp.
-   *
-   * @param row         - row key
-   * @param column      - column name
-   * @param timestamp   - timestamp
-   * @param numVersions - number of versions to retrieve
-   * @return            - array of values that match the above criteria
-   * @throws IOException
-   */
-  public Cell[] get(final byte [] row, final byte [] column,
-    final long timestamp, final int numVersions)
-  throws IOException {
-    Cell[] values = null;
-    values = connection.getRegionServerWithRetries(
-        new ServerCallable<Cell[]>(connection, tableName, row) {
-          public Cell[] call() throws IOException {
-            return server.get(location.getRegionInfo().getRegionName(), row, 
-                column, timestamp, numVersions);
-          }
-        }
-    );
-
-    if (values != null) {
-      ArrayList<Cell> cellValues = new ArrayList<Cell>();
-      for (int i = 0 ; i < values.length; i++) {
-        cellValues.add(values[i]);
-      }
-      return cellValues.toArray(new Cell[values.length]);
-    }
-    return null;
-  }
-
-  /** 
-   * Get all the data for the specified row at the latest timestamp
-   * 
-   * @param row row key
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public RowResult getRow(final Text row) throws IOException {
-    return getRow(row.getBytes());
-  }
-
-  /** 
-   * Get all the data for the specified row at the latest timestamp
-   * 
-   * @param row row key
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final String row) throws IOException {
-    return getRow(Bytes.toBytes(row));
-  }
-
-  /** 
-   * Get all the data for the specified row at the latest timestamp
-   * 
-   * @param row row key
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final byte [] row) throws IOException {
-    return getRow(row, HConstants.LATEST_TIMESTAMP);
-  }
-
-  /** 
-   * Get all the data for the specified row at a specified timestamp
-   * 
-   * @param row row key
-   * @param ts timestamp
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public RowResult getRow(final Text row, final long ts) 
-  throws IOException {
-    return getRow(row.getBytes(), ts);
-  }
-
-  /** 
-   * Get all the data for the specified row at a specified timestamp
-   * 
-   * @param row row key
-   * @param ts timestamp
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final String row, final long ts) 
-  throws IOException {
-    return getRow(Bytes.toBytes(row), ts);
-  }
-
-  /** 
-   * Get all the data for the specified row at a specified timestamp
-   * 
-   * @param row row key
-   * @param ts timestamp
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final byte [] row, final long ts) 
-  throws IOException {
-    return getRow(row,null,ts);
-  }
-
-  /** 
-   * Get selected columns for the specified row at the latest timestamp
-   * 
-   * @param row row key
-   * @param columns Array of column names and families you want to retrieve.
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public RowResult getRow(final Text row, final Text[] columns) 
-  throws IOException {
-    return getRow(row.getBytes(), Bytes.toByteArrays(columns));
-  }
-
-  /** 
-   * Get selected columns for the specified row at the latest timestamp
-   * 
-   * @param row row key
-   * @param columns Array of column names and families you want to retrieve.
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final String row, final String [] columns) 
-  throws IOException {
-    return getRow(Bytes.toBytes(row), Bytes.toByteArrays(columns));
-  }
-
-  /** 
-   * Get selected columns for the specified row at the latest timestamp
-   * 
-   * @param row row key
-   * @param columns Array of column names and families you want to retrieve.
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final byte [] row, final byte [][] columns) 
-  throws IOException {
-    return getRow(row, columns, HConstants.LATEST_TIMESTAMP);
-  }
-
-  /** 
-   * Get selected columns for the specified row at a specified timestamp
-   * 
-   * @param row row key
-   * @param columns Array of column names and families you want to retrieve.
-   * @param ts timestamp
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public RowResult getRow(final Text row, final Text [] columns, 
-    final long ts) 
-  throws IOException {  
-    return getRow(row.getBytes(), Bytes.toByteArrays(columns), ts);
-  }
-
-  /** 
-   * Get selected columns for the specified row at a specified timestamp
-   * 
-   * @param row row key
-   * @param columns Array of column names and families you want to retrieve.
-   * @param ts timestamp
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final String row, final String [] columns, 
-    final long ts) 
-  throws IOException {  
-    return getRow(Bytes.toBytes(row), Bytes.toByteArrays(columns), ts);
-  }
-
-  /** 
-   * Get selected columns for the specified row at a specified timestamp
-   * 
-   * @param row row key
-   * @param columns Array of column names and families you want to retrieve.
-   * @param ts timestamp
-   * @return RowResult is empty if row does not exist.
-   * @throws IOException
-   */
-  public RowResult getRow(final byte [] row, final byte [][] columns, 
-    final long ts) 
-  throws IOException {       
-    return connection.getRegionServerWithRetries(
-        new ServerCallable<RowResult>(connection, tableName, row) {
-          public RowResult call() throws IOException {
-            return server.getRow(location.getRegionInfo().getRegionName(), row, 
-                columns, ts);
-          }
-        }
-    );
-  }
-
-  /** 
-   * Get a scanner on the current table starting at first row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @return scanner
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Scanner getScanner(final Text [] columns)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), HConstants.EMPTY_START_ROW);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at first row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final String [] columns)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), HConstants.EMPTY_START_ROW);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @return scanner
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Scanner getScanner(final Text [] columns, final Text startRow)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), startRow.getBytes());
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final String [] columns, final String startRow)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), Bytes.toBytes(startRow));
-  }
-
-  /** 
-   * Get a scanner on the current table starting at first row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte[][] columns)
-  throws IOException {
-    return getScanner(columns, HConstants.EMPTY_START_ROW,
-      HConstants.LATEST_TIMESTAMP, null);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte[][] columns, final byte [] startRow)
-  throws IOException {
-    return getScanner(columns, startRow, HConstants.LATEST_TIMESTAMP, null);
-  }
-  
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param timestamp only return results whose timestamp <= this value
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte[][] columns, final byte [] startRow,
-    long timestamp)
-  throws IOException {
-    return getScanner(columns, startRow, timestamp, null);
-  }
-  
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param filter a row filter using row-key regexp and/or column data filter.
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte[][] columns, final byte [] startRow,
-    RowFilterInterface filter)
-  throws IOException { 
-    return getScanner(columns, startRow, HConstants.LATEST_TIMESTAMP, filter);
-  }
-  
-  /** 
-   * Get a scanner on the current table starting at the specified row and
-   * ending just before <code>stopRow<code>.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param stopRow Row to stop scanning on. Once we hit this row we stop
-   * returning values; i.e. we return the row before this one but not the
-   * <code>stopRow</code> itself.
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte [][] columns,
-    final byte [] startRow, final byte [] stopRow)
-  throws IOException {
-    return getScanner(columns, startRow, stopRow,
-      HConstants.LATEST_TIMESTAMP);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row and
-   * ending just before <code>stopRow<code>.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param stopRow Row to stop scanning on. Once we hit this row we stop
-   * returning values; i.e. we return the row before this one but not the
-   * <code>stopRow</code> itself.
-   * @param timestamp only return results whose timestamp <= this value
-   * @return scanner
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Scanner getScanner(final Text[] columns,
-    final Text startRow, final Text stopRow, final long timestamp)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), startRow.getBytes(),
-      stopRow.getBytes(), timestamp);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row and
-   * ending just before <code>stopRow<code>.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param stopRow Row to stop scanning on. Once we hit this row we stop
-   * returning values; i.e. we return the row before this one but not the
-   * <code>stopRow</code> itself.
-   * @param timestamp only return results whose timestamp <= this value
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final String [] columns,
-    final String startRow, final String stopRow, final long timestamp)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), Bytes.toBytes(startRow),
-      Bytes.toBytes(stopRow), timestamp);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row and
-   * ending just before <code>stopRow<code>.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param stopRow Row to stop scanning on. Once we hit this row we stop
-   * returning values; i.e. we return the row before this one but not the
-   * <code>stopRow</code> itself.
-   * @param timestamp only return results whose timestamp <= this value
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte [][] columns,
-    final byte [] startRow, final byte [] stopRow, final long timestamp)
-  throws IOException {
-    return getScanner(columns, startRow, timestamp,
-      new WhileMatchRowFilter(new StopRowFilter(stopRow)));
-  }  
-  
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param timestamp only return results whose timestamp <= this value
-   * @param filter a row filter using row-key regexp and/or column data filter.
-   * @return scanner
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public Scanner getScanner(Text[] columns,
-    Text startRow, long timestamp, RowFilterInterface filter)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), startRow.getBytes(),
-      timestamp, filter);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param timestamp only return results whose timestamp <= this value
-   * @param filter a row filter using row-key regexp and/or column data filter.
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(String[] columns,
-    String startRow, long timestamp, RowFilterInterface filter)
-  throws IOException {
-    return getScanner(Bytes.toByteArrays(columns), Bytes.toBytes(startRow),
-      timestamp, filter);
-  }
-
-  /** 
-   * Get a scanner on the current table starting at the specified row.
-   * Return the specified columns.
-   *
-   * @param columns columns to scan. If column name is a column family, all
-   * columns of the specified column family are returned.  Its also possible
-   * to pass a regex in the column qualifier. A column qualifier is judged to
-   * be a regex if it contains at least one of the following characters:
-   * <code>\+|^&*$[]]}{)(</code>.
-   * @param startRow starting row in table to scan
-   * @param timestamp only return results whose timestamp <= this value
-   * @param filter a row filter using row-key regexp and/or column data filter.
-   * @return scanner
-   * @throws IOException
-   */
-  public Scanner getScanner(final byte [][] columns,
-    final byte [] startRow, long timestamp, RowFilterInterface filter)
-  throws IOException {
-    return new ClientScanner(columns, startRow, timestamp, filter);
-  }
-  
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @throws IOException
-   */
-  public void deleteAll(final byte [] row) throws IOException {
-    deleteAll(row, null);
-  }
-  
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public void deleteAll(final Text row) throws IOException {
-    deleteAll(row, null);
-  }
-  
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @throws IOException
-   */
-  public void deleteAll(final String row) throws IOException {
-    deleteAll(row, null);
-  }
-  
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @param column column to be deleted
-   * @throws IOException
-   */
-  public void deleteAll(final byte [] row, final byte [] column)
-  throws IOException {
-    deleteAll(row, column, HConstants.LATEST_TIMESTAMP);
-  }
-
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @param ts Delete all cells of the same timestamp or older.
-   * @throws IOException
-   */
-  public void deleteAll(final byte [] row, final long ts)
-  throws IOException {
-    deleteAll(row, null, ts);
-  }
-
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @param ts Delete all cells of the same timestamp or older.
-   * @throws IOException
-   */
-  public void deleteAll(final String row, final long ts)
-  throws IOException {
-    deleteAll(row, null, ts);
-  }
-
-  /**
-   * Completely delete the row's cells.
-   *
-   * @param row Key of the row you want to completely delete.
-   * @param ts Delete all cells of the same timestamp or older.
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */
-  public void deleteAll(final Text row, final long ts)
-  throws IOException {
-    deleteAll(row, null, ts);
-  }
-
-  /** 
-   * Delete all cells that match the passed row and column.
-   * @param row Row to update
-   * @param column name of column whose value is to be deleted
-   * @throws IOException 
-   * @deprecated Use String or byte [] overload instead
-   */
-  public void deleteAll(final Text row, final Text column) throws IOException {
-    deleteAll(row, column, HConstants.LATEST_TIMESTAMP);
-  }
-
-  /** 
-   * Delete all cells that match the passed row and column.
-   * @param row Row to update
-   * @param column name of column whose value is to be deleted
-   * @throws IOException 
-   */
-  public void deleteAll(final String row, final String column)
-  throws IOException {
-    deleteAll(row, column, HConstants.LATEST_TIMESTAMP);
-  }
-
-  /** 
-   * Delete all cells that match the passed row and column and whose
-   * timestamp is equal-to or older than the passed timestamp.
-   * @param row Row to update
-   * @param column name of column whose value is to be deleted
-   * @param ts Delete all cells of the same timestamp or older.
-   * @throws IOException 
-   * @deprecated Use String or byte [] overload instead
-   */
-  public void deleteAll(final Text row, final Text column, final long ts)
-  throws IOException {
-    deleteAll(row.getBytes(), column.getBytes(), ts);
-  }
-  
-  /** 
-   * Delete all cells that match the passed row and column and whose
-   * timestamp is equal-to or older than the passed timestamp.
-   * @param row Row to update
-   * @param column name of column whose value is to be deleted
-   * @param ts Delete all cells of the same timestamp or older.
-   * @throws IOException 
-   */
-  public void deleteAll(final String row, final String column, final long ts)
-  throws IOException {
-    deleteAll(Bytes.toBytes(row),
-      column != null? Bytes.toBytes(column): null, ts);
-  }
-
-  /** 
-   * Delete all cells that match the passed row and column and whose
-   * timestamp is equal-to or older than the passed timestamp.
-   * @param row Row to update
-   * @param column name of column whose value is to be deleted
-   * @param ts Delete all cells of the same timestamp or older.
-   * @throws IOException 
-   */
-  public void deleteAll(final byte [] row, final byte [] column, final long ts)
-  throws IOException {
-    connection.getRegionServerWithRetries(
-        new ServerCallable<Boolean>(connection, tableName, row) {
-          public Boolean call() throws IOException {
-            if (column != null) {
-              this.server.deleteAll(location.getRegionInfo().getRegionName(),
-                row, column, ts);
-            } else {
-              this.server.deleteAll(location.getRegionInfo().getRegionName(),
-                  row, ts);
-            }
-            return null;
-          }
-        }
-    );
-  }
-
-  /**
-   * Delete all cells for a row with matching column family at all timestamps.
-   *
-   * @param row The row to operate on
-   * @param family The column family to match
-   * @param timestamp Timestamp to match
-   * @throws IOException
-   * @deprecated Use String or byte [] overload instead
-   */  
-  public void deleteFamily(final Text row, final Text family,
-      final long timestamp)
-  throws IOException{
-    deleteFamily(row.getBytes(), family.getBytes(), timestamp);
-  }
-
-  /**
-   * Delete all cells for a row with matching column family at all timestamps.
-   *
-   * @param row The row to operate on
-   * @param family The column family to match
-   * @param timestamp Timestamp to match
-   * @throws IOException
-   */  
-  public void deleteFamily(final String row, final String family,
-      final long timestamp)
-  throws IOException{
-    deleteFamily(Bytes.toBytes(row), Bytes.toBytes(family), timestamp);
-  }
-
-  /**
-   * Delete all cells for a row with matching column family with timestamps
-   * less than or equal to <i>timestamp</i>.
-   *
-   * @param row The row to operate on
-   * @param family The column family to match
-   * @param timestamp Timestamp to match
-   * @throws IOException
-   */
-  public void deleteFamily(final byte [] row, final byte [] family, 
-    final long timestamp)
-  throws IOException {
-    connection.getRegionServerWithRetries(
-        new ServerCallable<Boolean>(connection, tableName, row) {
-          public Boolean call() throws IOException {
-            server.deleteFamily(location.getRegionInfo().getRegionName(), row, 
-                family, timestamp);
-            return null;
-          }
-        }
-    );
-  }
-
-  /**
-   * Commit a BatchUpdate to the table.
-   * @param batchUpdate
-   * @throws IOException
-   */ 
-  public synchronized void commit(final BatchUpdate batchUpdate) 
-  throws IOException {
-    connection.getRegionServerWithRetries(
-      new ServerCallable<Boolean>(connection, tableName, batchUpdate.getRow()) {
-        public Boolean call() throws IOException {
-          server.batchUpdate(location.getRegionInfo().getRegionName(), 
-            batchUpdate);
-          return null;
-        }
-      }
-    );  
-  }
-  
-  /**
-   * Commit a RowsBatchUpdate to the table.
-   * @param batchUpdates
-   * @throws IOException
-   */ 
-  public synchronized void commit(final List<BatchUpdate> batchUpdates) 
-  throws IOException {
-    for (BatchUpdate batchUpdate : batchUpdates) 
-      commit(batchUpdate);
-  }
-
-  /**
-   * Implements the scanner interface for the HBase client.
-   * If there are multiple regions in a table, this scanner will iterate
-   * through them all.
-   */
-  protected class ClientScanner implements Scanner {
-    private final Log CLIENT_LOG = LogFactory.getLog(this.getClass());
-    private byte[][] columns;
-    private byte [] startRow;
-    protected long scanTime;
-    @SuppressWarnings("hiding")
-    private boolean closed = false;
-    private HRegionInfo currentRegion = null;
-    private ScannerCallable callable = null;
-    protected RowFilterInterface filter;
-    
-    protected ClientScanner(final Text [] columns, final Text startRow,
-        long timestamp, RowFilterInterface filter)
-    throws IOException {
-      this(Bytes.toByteArrays(columns), startRow.getBytes(), timestamp,
-        filter);
-    }
-
-    protected ClientScanner(final byte[][] columns, final byte [] startRow,
-        final long timestamp, final RowFilterInterface filter) 
-    throws IOException {
-      if (CLIENT_LOG.isDebugEnabled()) {
-        CLIENT_LOG.debug("Creating scanner over " + Bytes.toString(getTableName()) +
-          " starting at key '" + Bytes.toString(startRow) + "'");
-      }
-      // save off the simple parameters
-      this.columns = columns;
-      this.startRow = startRow;
-      this.scanTime = timestamp;
-      
-      // save the filter, and make sure that the filter applies to the data
-      // we're expecting to pull back
-      this.filter = filter;
-      if (filter != null) {
-        filter.validate(columns);
-      }
-      nextScanner();
-    }
-    
-    protected byte[][] getColumns() {
-      return columns;
-    }
-    
-    protected long getTimestamp() {
-      return scanTime;
-    }
-    
-    protected RowFilterInterface getFilter() {
-      return filter;
-    }
-        
-    /*
-     * Gets a scanner for the next region.
-     * Returns false if there are no more scanners.
-     */
-    private boolean nextScanner() throws IOException {
-      // Close the previous scanner if it's open
-      if (this.callable != null) {
-        this.callable.setClose();
-        getConnection().getRegionServerWithRetries(callable);
-        this.callable = null;
-      }
-
-      // if we're at the end of the table, then close and return false
-      // to stop iterating
-      if (currentRegion != null) {
-        if (CLIENT_LOG.isDebugEnabled()) {
-          CLIENT_LOG.debug("Advancing forward from region " + currentRegion);
-        }
-
-        byte [] endKey = currentRegion.getEndKey();
-        if (endKey == null ||
-            Bytes.equals(endKey, HConstants.EMPTY_BYTE_ARRAY) ||
-            filterSaysStop(endKey)) {
-          close();
-          return false;
-        }
-      } 
-      
-      HRegionInfo oldRegion = this.currentRegion;
-      byte [] localStartKey = oldRegion == null? startRow: oldRegion.getEndKey();
-
-      if (CLIENT_LOG.isDebugEnabled()) {
-        CLIENT_LOG.debug("Advancing internal scanner to startKey at '" +
-          Bytes.toString(localStartKey) + "'");
-      }
-            
-      try {
-        callable = getScannerCallable(localStartKey);
-        // open a scanner on the region server starting at the 
-        // beginning of the region
-        getConnection().getRegionServerWithRetries(callable);
-        currentRegion = callable.getHRegionInfo();
-      } catch (IOException e) {
-        close();
-        throw e;
-      }
-      return true;
-    }
-    
-    protected ScannerCallable getScannerCallable(byte [] localStartKey) {
-      return new ScannerCallable(getConnection(), getTableName(), columns, 
-          localStartKey, scanTime, filter);
-    }
-
-    /**
-     * @param endKey
-     * @return Returns true if the passed region endkey is judged beyond
-     * filter.
-     */
-    private boolean filterSaysStop(final byte [] endKey) {
-      if (this.filter == null) {
-        return false;
-      }
-      // Let the filter see current row.
-      this.filter.filterRowKey(endKey);
-      return this.filter.filterAllRemaining();
-    }
-
-    /** {@inheritDoc} */
-    public RowResult next() throws IOException {
-      if (this.closed) {
-        return null;
-      }
-      RowResult values = null;
-      do {
-        values = getConnection().getRegionServerWithRetries(callable);
-      } while ((values == null || values.size() == 0) && nextScanner());
-
-      if (values != null && values.size() != 0) {
-        return values;
-      }
-      return null;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public void close() {
-      if (callable != null) {
-        callable.setClose();
-        try {
-          getConnection().getRegionServerWithRetries(callable);
-        } catch (IOException e) {
-          // We used to catch this error, interpret, and rethrow. However, we
-          // have since decided that it's not nice for a scanner's close to
-          // throw exceptions. Chances are it was just an UnknownScanner
-          // exception due to lease time out.
-        }
-        callable = null;
-      }
-      closed = true;
-    }
-
-    /** {@inheritDoc} */
-    public Iterator<RowResult> iterator() {
-      return new Iterator<RowResult>() {
-        // The next RowResult, possibly pre-read
-        RowResult next = null;
-        
-        // return true if there is another item pending, false if there isn't.
-        // this method is where the actual advancing takes place, but you need
-        // to call next() to consume it. hasNext() will only advance if there
-        // isn't a pending next().
-        public boolean hasNext() {
-          if (next == null) {
-            try {
-              next = ClientScanner.this.next();
-              return next != null;
-            } catch (IOException e) {
-              throw new RuntimeException(e);
-            }            
-          }
-          return true;
-        }
-
-        // get the pending next item and advance the iterator. returns null if
-        // there is no next item.
-        public RowResult next() {
-          // since hasNext() does the real advancing, we call this to determine
-          // if there is a next before proceeding.
-          if (!hasNext()) {
-            return null;
-          }
-          
-          // if we get to here, then hasNext() has given us an item to return.
-          // we want to return the item and then null out the next pointer, so
-          // we use a temporary variable.
-          RowResult temp = next;
-          next = null;
-          return temp;
-        }
-
-        public void remove() {
-          throw new UnsupportedOperationException();
-        }
-      };
-    }
-  }
-}
+/**
+ * Copyright 2008 The Apache Software Foundation
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.client;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.HRegionInfo;
+import org.apache.hadoop.hbase.HRegionLocation;
+import org.apache.hadoop.hbase.HServerAddress;
+import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitor;
+import org.apache.hadoop.hbase.filter.RowFilterInterface;
+import org.apache.hadoop.hbase.filter.StopRowFilter;
+import org.apache.hadoop.hbase.filter.WhileMatchRowFilter;
+import org.apache.hadoop.hbase.io.BatchUpdate;
+import org.apache.hadoop.hbase.io.Cell;
+import org.apache.hadoop.hbase.io.RowResult;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.Writables;
+import org.apache.hadoop.io.Text;
+
+/**
+ * Used to communicate with a single HBase table
+ */
+public class HTable {
+  private final HConnection connection;
+  private final byte [] tableName;
+  private HBaseConfiguration configuration;
+
+  /**
+   * Creates an object to access a HBase table
+   *
+   * @param tableName name of the table
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public HTable(final Text tableName)
+  throws IOException {
+    this(new HBaseConfiguration(), tableName.getBytes());
+  }
+
+  /**
+   * Creates an object to access a HBase table
+   *
+   * @param tableName name of the table
+   * @throws IOException
+   */
+  public HTable(final String tableName)
+  throws IOException {
+    this(new HBaseConfiguration(), Bytes.toBytes(tableName));
+  }
+
+  /**
+   * Creates an object to access a HBase table
+   *
+   * @param tableName name of the table
+   * @throws IOException
+   */
+  public HTable(final byte [] tableName)
+  throws IOException {
+    this(new HBaseConfiguration(), tableName);
+  }
+
+  /**
+   * Creates an object to access a HBase table
+   * 
+   * @param conf configuration object
+   * @param tableName name of the table
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public HTable(HBaseConfiguration conf, final Text tableName)
+  throws IOException {
+    this(conf, tableName.getBytes());
+  }
+
+  /**
+   * Creates an object to access a HBase table
+   * 
+   * @param conf configuration object
+   * @param tableName name of the table
+   * @throws IOException
+   */
+  public HTable(HBaseConfiguration conf, final String tableName)
+  throws IOException {
+    this(conf, Bytes.toBytes(tableName));
+  }
+
+  /**
+   * Creates an object to access a HBase table
+   * 
+   * @param conf configuration object
+   * @param tableName name of the table
+   * @throws IOException
+   */
+  public HTable(HBaseConfiguration conf, final byte [] tableName)
+  throws IOException {
+    this.connection = HConnectionManager.getConnection(conf);
+    this.configuration = conf;
+    this.tableName = tableName;
+    this.connection.locateRegion(tableName, HConstants.EMPTY_START_ROW);
+  }
+
+  /**
+   * @param tableName name of table to check
+   * @return true if table is on-line
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public static boolean isTableEnabled(Text tableName) throws IOException {
+    return isTableEnabled(tableName.getBytes());
+  }
+  /**
+   * @param tableName name of table to check
+   * @return true if table is on-line
+   * @throws IOException
+   */
+  public static boolean isTableEnabled(String tableName) throws IOException {
+    return isTableEnabled(Bytes.toBytes(tableName));
+  }
+  /**
+   * @param tableName name of table to check
+   * @return true if table is on-line
+   * @throws IOException
+   */
+  public static boolean isTableEnabled(byte[] tableName) throws IOException {
+    return isTableEnabled(new HBaseConfiguration(), tableName);
+  }
+  
+  /**
+   * @param conf HBaseConfiguration object
+   * @param tableName name of table to check
+   * @return true if table is on-line
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public static boolean isTableEnabled(HBaseConfiguration conf, Text tableName)
+  throws IOException {
+    return isTableEnabled(conf, tableName.getBytes());
+  }
+  
+  /**
+   * @param conf HBaseConfiguration object
+   * @param tableName name of table to check
+   * @return true if table is on-line
+   * @throws IOException
+   */
+  public static boolean isTableEnabled(HBaseConfiguration conf, String tableName)
+  throws IOException {
+    return isTableEnabled(conf, Bytes.toBytes(tableName));
+  }
+
+  /**
+   * @param conf HBaseConfiguration object
+   * @param tableName name of table to check
+   * @return true if table is on-line
+   * @throws IOException
+   */
+  public static boolean isTableEnabled(HBaseConfiguration conf, byte[] tableName)
+  throws IOException {
+    return HConnectionManager.getConnection(conf).isTableEnabled(tableName);
+  }
+  
+  /**
+   * Find region location hosting passed row using cached info
+   * @param row Row to find.
+   * @return Location of row.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public HRegionLocation getRegionLocation(final Text row)
+  throws IOException {
+    return connection.getRegionLocation(tableName, row.getBytes(), false);
+  }
+
+  /**
+   * Find region location hosting passed row using cached info
+   * @param row Row to find.
+   * @return Location of row.
+   * @throws IOException
+   */
+  public HRegionLocation getRegionLocation(final String row)
+  throws IOException {
+    return connection.getRegionLocation(tableName, Bytes.toBytes(row), false);
+  }
+
+  /**
+   * Find region location hosting passed row using cached info
+   * @param row Row to find.
+   * @return Location of row.
+   * @throws IOException
+   */
+  public HRegionLocation getRegionLocation(final byte [] row)
+  throws IOException {
+    return connection.getRegionLocation(tableName, row, false);
+  }
+
+  /** @return the table name */
+  public byte [] getTableName() {
+    return this.tableName;
+  }
+
+  /**
+   * Used by unit tests and tools to do low-level manipulations.  Not for
+   * general use.
+   * @return An HConnection instance.
+   */
+  public HConnection getConnection() {
+    return this.connection;
+  }
+
+  /**
+   * @return table metadata 
+   * @throws IOException
+   */
+  @Deprecated
+  public HTableDescriptor getMetadata() throws IOException {
+    return getTableDescriptor();
+  }
+
+  /**
+   * @return table metadata 
+   * @throws IOException
+   */
+  public HTableDescriptor getTableDescriptor() throws IOException {
+    return new UnmodifyableHTableDescriptor(
+      this.connection.getHTableDescriptor(this.tableName));
+  }
+
+  /**
+   * Gets the starting row key for every region in the currently open table
+   * 
+   * @return Array of region starting row keys
+   * @throws IOException
+   */
+  @SuppressWarnings("null")
+  public byte[][] getStartKeys() throws IOException {
+    final List<byte[]> keyList = new ArrayList<byte[]>();
+
+    MetaScannerVisitor visitor = new MetaScannerVisitor() {
+      public boolean processRow(RowResult rowResult) throws IOException {
+        HRegionInfo info = Writables.getHRegionInfo(
+            rowResult.get(HConstants.COL_REGIONINFO));
+        if (Bytes.equals(info.getTableDesc().getName(), getTableName())) {
+          if (!(info.isOffline() || info.isSplit())) {
+            keyList.add(info.getStartKey());
+          }
+        }
+        return true;
+      }
+
+    };
+    MetaScanner.metaScan(configuration, visitor, this.tableName);
+    return keyList.toArray(new byte[keyList.size()][]);
+  }
+
+  /**
+   * Get all the regions and their address for this table
+   * 
+   * @return A map of HRegionInfo with it's server address
+   * @throws IOException
+   */
+  public Map<HRegionInfo, HServerAddress> getRegionsInfo() throws IOException {
+    final Map<HRegionInfo, HServerAddress> regionMap =
+      new TreeMap<HRegionInfo, HServerAddress>();
+
+    MetaScannerVisitor visitor = new MetaScannerVisitor() {
+      public boolean processRow(RowResult rowResult) throws IOException {
+        HRegionInfo info = Writables.getHRegionInfo(
+            rowResult.get(HConstants.COL_REGIONINFO));
+        
+        if (!(Bytes.equals(info.getTableDesc().getName(), getTableName()))) {
+          return false;
+        }
+
+        HServerAddress server = new HServerAddress();
+        Cell c = rowResult.get(HConstants.COL_SERVER);
+        if (c != null && c.getValue() != null && c.getValue().length > 0) {
+          String address = Bytes.toString(c.getValue());
+          server = new HServerAddress(address);
+        }
+        
+        if (!(info.isOffline() || info.isSplit())) {
+          regionMap.put(new UnmodifyableHRegionInfo(info), server);
+        }
+        return true;
+      }
+
+    };
+    MetaScanner.metaScan(configuration, visitor, tableName);
+    return regionMap;
+  }
+  
+  /**
+   * Get a single value for the specified row and column
+   * 
+   * @param row row key
+   * @param column column name
+   * @return value for specified row/column
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Cell get(final Text row, final Text column)
+  throws IOException {
+    return get(row.getBytes(), column.getBytes());
+  }
+
+  /** 
+   * Get a single value for the specified row and column
+   *
+   * @param row row key
+   * @param column column name
+   * @param numVersions - number of versions to retrieve
+   * @return value for specified row/column
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Cell[] get(final Text row, final Text column, int numVersions)
+  throws IOException {
+    return get(row.getBytes(), column.getBytes(), numVersions);
+  }
+
+  /**
+   * Get a single value for the specified row and column
+   * 
+   * @param row row key
+   * @param column column name
+   * @return value for specified row/column
+   * @throws IOException
+   */
+  public Cell get(final String row, final String column)
+  throws IOException {
+    return get(Bytes.toBytes(row), Bytes.toBytes(column));
+  }
+
+  /** 
+   * Get a single value for the specified row and column
+   *
+   * @param row row key
+   * @param column column name
+   * @param numVersions - number of versions to retrieve
+   * @return value for specified row/column
+   * @throws IOException
+   */
+  public Cell[] get(final String row, final String column, int numVersions)
+  throws IOException {
+    return get(Bytes.toBytes(row), Bytes.toBytes(column), numVersions);
+  }
+
+  /** 
+   * Get a single value for the specified row and column
+   *
+   * @param row row key
+   * @param column column name
+   * @return value for specified row/column
+   * @throws IOException
+   */
+  public Cell get(final byte [] row, final byte [] column)
+  throws IOException {
+    return connection.getRegionServerWithRetries(
+        new ServerCallable<Cell>(connection, tableName, row) {
+          public Cell call() throws IOException {
+            return server.get(location.getRegionInfo().getRegionName(), row,
+                column);
+          }
+        }
+    );
+  }
+
+  /** 
+   * Get the specified number of versions of the specified row and column
+   * @param row row key
+   * @param column column name
+   * @param numVersions number of versions to retrieve
+   * @return Array of Cells.
+   * @throws IOException
+   */
+  public Cell[] get(final byte [] row, final byte [] column,
+    final int numVersions) 
+  throws IOException {
+    return connection.getRegionServerWithRetries(
+        new ServerCallable<Cell[]>(connection, tableName, row) {
+          public Cell[] call() throws IOException {
+            return server.get(location.getRegionInfo().getRegionName(), row, 
+                column, numVersions);
+          }
+        }
+    );
+  }
+
+  /** 
+   * Get the specified number of versions of the specified row and column with
+   * the specified timestamp.
+   *
+   * @param row         - row key
+   * @param column      - column name
+   * @param timestamp   - timestamp
+   * @param numVersions - number of versions to retrieve
+   * @return            - array of values that match the above criteria
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Cell[] get(final Text row, final Text column,
+    final long timestamp, final int numVersions)
+  throws IOException {
+    return get(row.getBytes(), column.getBytes(), timestamp, numVersions);
+  }
+
+  /** 
+   * Get the specified number of versions of the specified row and column with
+   * the specified timestamp.
+   *
+   * @param row         - row key
+   * @param column      - column name
+   * @param timestamp   - timestamp
+   * @param numVersions - number of versions to retrieve
+   * @return            - array of values that match the above criteria
+   * @throws IOException
+   */
+  public Cell[] get(final String row, final String column,
+    final long timestamp, final int numVersions)
+  throws IOException {
+    return get(Bytes.toBytes(row), Bytes.toBytes(column), timestamp, numVersions);
+  }
+
+  /** 
+   * Get the specified number of versions of the specified row and column with
+   * the specified timestamp.
+   *
+   * @param row         - row key
+   * @param column      - column name
+   * @param timestamp   - timestamp
+   * @param numVersions - number of versions to retrieve
+   * @return            - array of values that match the above criteria
+   * @throws IOException
+   */
+  public Cell[] get(final byte [] row, final byte [] column,
+    final long timestamp, final int numVersions)
+  throws IOException {
+    Cell[] values = null;
+    values = connection.getRegionServerWithRetries(
+        new ServerCallable<Cell[]>(connection, tableName, row) {
+          public Cell[] call() throws IOException {
+            return server.get(location.getRegionInfo().getRegionName(), row, 
+                column, timestamp, numVersions);
+          }
+        }
+    );
+
+    if (values != null) {
+      ArrayList<Cell> cellValues = new ArrayList<Cell>();
+      for (int i = 0 ; i < values.length; i++) {
+        cellValues.add(values[i]);
+      }
+      return cellValues.toArray(new Cell[values.length]);
+    }
+    return null;
+  }
+
+  /** 
+   * Get all the data for the specified row at the latest timestamp
+   * 
+   * @param row row key
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public RowResult getRow(final Text row) throws IOException {
+    return getRow(row.getBytes());
+  }
+
+  /** 
+   * Get all the data for the specified row at the latest timestamp
+   * 
+   * @param row row key
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final String row) throws IOException {
+    return getRow(Bytes.toBytes(row));
+  }
+
+  /** 
+   * Get all the data for the specified row at the latest timestamp
+   * 
+   * @param row row key
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final byte [] row) throws IOException {
+    return getRow(row, HConstants.LATEST_TIMESTAMP);
+  }
+
+  /** 
+   * Get all the data for the specified row at a specified timestamp
+   * 
+   * @param row row key
+   * @param ts timestamp
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public RowResult getRow(final Text row, final long ts) 
+  throws IOException {
+    return getRow(row.getBytes(), ts);
+  }
+
+  /** 
+   * Get all the data for the specified row at a specified timestamp
+   * 
+   * @param row row key
+   * @param ts timestamp
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final String row, final long ts) 
+  throws IOException {
+    return getRow(Bytes.toBytes(row), ts);
+  }
+
+  /** 
+   * Get all the data for the specified row at a specified timestamp
+   * 
+   * @param row row key
+   * @param ts timestamp
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final byte [] row, final long ts) 
+  throws IOException {
+    return getRow(row,null,ts);
+  }
+
+  /** 
+   * Get selected columns for the specified row at the latest timestamp
+   * 
+   * @param row row key
+   * @param columns Array of column names and families you want to retrieve.
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public RowResult getRow(final Text row, final Text[] columns) 
+  throws IOException {
+    return getRow(row.getBytes(), Bytes.toByteArrays(columns));
+  }
+
+  /** 
+   * Get selected columns for the specified row at the latest timestamp
+   * 
+   * @param row row key
+   * @param columns Array of column names and families you want to retrieve.
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final String row, final String [] columns) 
+  throws IOException {
+    return getRow(Bytes.toBytes(row), Bytes.toByteArrays(columns));
+  }
+
+  /** 
+   * Get selected columns for the specified row at the latest timestamp
+   * 
+   * @param row row key
+   * @param columns Array of column names and families you want to retrieve.
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final byte [] row, final byte [][] columns) 
+  throws IOException {
+    return getRow(row, columns, HConstants.LATEST_TIMESTAMP);
+  }
+
+  /** 
+   * Get selected columns for the specified row at a specified timestamp
+   * 
+   * @param row row key
+   * @param columns Array of column names and families you want to retrieve.
+   * @param ts timestamp
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public RowResult getRow(final Text row, final Text [] columns, 
+    final long ts) 
+  throws IOException {  
+    return getRow(row.getBytes(), Bytes.toByteArrays(columns), ts);
+  }
+
+  /** 
+   * Get selected columns for the specified row at a specified timestamp
+   * 
+   * @param row row key
+   * @param columns Array of column names and families you want to retrieve.
+   * @param ts timestamp
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final String row, final String [] columns, 
+    final long ts) 
+  throws IOException {  
+    return getRow(Bytes.toBytes(row), Bytes.toByteArrays(columns), ts);
+  }
+
+  /** 
+   * Get selected columns for the specified row at a specified timestamp
+   * 
+   * @param row row key
+   * @param columns Array of column names and families you want to retrieve.
+   * @param ts timestamp
+   * @return RowResult is empty if row does not exist.
+   * @throws IOException
+   */
+  public RowResult getRow(final byte [] row, final byte [][] columns, 
+    final long ts) 
+  throws IOException {       
+    return connection.getRegionServerWithRetries(
+        new ServerCallable<RowResult>(connection, tableName, row) {
+          public RowResult call() throws IOException {
+            return server.getRow(location.getRegionInfo().getRegionName(), row, 
+                columns, ts);
+          }
+        }
+    );
+  }
+
+  /** 
+   * Get a scanner on the current table starting at first row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @return scanner
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Scanner getScanner(final Text [] columns)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), HConstants.EMPTY_START_ROW);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at first row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final String [] columns)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), HConstants.EMPTY_START_ROW);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @return scanner
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Scanner getScanner(final Text [] columns, final Text startRow)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), startRow.getBytes());
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final String [] columns, final String startRow)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), Bytes.toBytes(startRow));
+  }
+
+  /** 
+   * Get a scanner on the current table starting at first row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte[][] columns)
+  throws IOException {
+    return getScanner(columns, HConstants.EMPTY_START_ROW,
+      HConstants.LATEST_TIMESTAMP, null);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte[][] columns, final byte [] startRow)
+  throws IOException {
+    return getScanner(columns, startRow, HConstants.LATEST_TIMESTAMP, null);
+  }
+  
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param timestamp only return results whose timestamp <= this value
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte[][] columns, final byte [] startRow,
+    long timestamp)
+  throws IOException {
+    return getScanner(columns, startRow, timestamp, null);
+  }
+  
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param filter a row filter using row-key regexp and/or column data filter.
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte[][] columns, final byte [] startRow,
+    RowFilterInterface filter)
+  throws IOException { 
+    return getScanner(columns, startRow, HConstants.LATEST_TIMESTAMP, filter);
+  }
+  
+  /** 
+   * Get a scanner on the current table starting at the specified row and
+   * ending just before <code>stopRow<code>.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param stopRow Row to stop scanning on. Once we hit this row we stop
+   * returning values; i.e. we return the row before this one but not the
+   * <code>stopRow</code> itself.
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte [][] columns,
+    final byte [] startRow, final byte [] stopRow)
+  throws IOException {
+    return getScanner(columns, startRow, stopRow,
+      HConstants.LATEST_TIMESTAMP);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row and
+   * ending just before <code>stopRow<code>.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param stopRow Row to stop scanning on. Once we hit this row we stop
+   * returning values; i.e. we return the row before this one but not the
+   * <code>stopRow</code> itself.
+   * @param timestamp only return results whose timestamp <= this value
+   * @return scanner
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Scanner getScanner(final Text[] columns,
+    final Text startRow, final Text stopRow, final long timestamp)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), startRow.getBytes(),
+      stopRow.getBytes(), timestamp);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row and
+   * ending just before <code>stopRow<code>.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param stopRow Row to stop scanning on. Once we hit this row we stop
+   * returning values; i.e. we return the row before this one but not the
+   * <code>stopRow</code> itself.
+   * @param timestamp only return results whose timestamp <= this value
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final String [] columns,
+    final String startRow, final String stopRow, final long timestamp)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), Bytes.toBytes(startRow),
+      Bytes.toBytes(stopRow), timestamp);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row and
+   * ending just before <code>stopRow<code>.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param stopRow Row to stop scanning on. Once we hit this row we stop
+   * returning values; i.e. we return the row before this one but not the
+   * <code>stopRow</code> itself.
+   * @param timestamp only return results whose timestamp <= this value
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte [][] columns,
+    final byte [] startRow, final byte [] stopRow, final long timestamp)
+  throws IOException {
+    return getScanner(columns, startRow, timestamp,
+      new WhileMatchRowFilter(new StopRowFilter(stopRow)));
+  }  
+  
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param timestamp only return results whose timestamp <= this value
+   * @param filter a row filter using row-key regexp and/or column data filter.
+   * @return scanner
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public Scanner getScanner(Text[] columns,
+    Text startRow, long timestamp, RowFilterInterface filter)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), startRow.getBytes(),
+      timestamp, filter);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param timestamp only return results whose timestamp <= this value
+   * @param filter a row filter using row-key regexp and/or column data filter.
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(String[] columns,
+    String startRow, long timestamp, RowFilterInterface filter)
+  throws IOException {
+    return getScanner(Bytes.toByteArrays(columns), Bytes.toBytes(startRow),
+      timestamp, filter);
+  }
+
+  /** 
+   * Get a scanner on the current table starting at the specified row.
+   * Return the specified columns.
+   *
+   * @param columns columns to scan. If column name is a column family, all
+   * columns of the specified column family are returned.  Its also possible
+   * to pass a regex in the column qualifier. A column qualifier is judged to
+   * be a regex if it contains at least one of the following characters:
+   * <code>\+|^&*$[]]}{)(</code>.
+   * @param startRow starting row in table to scan
+   * @param timestamp only return results whose timestamp <= this value
+   * @param filter a row filter using row-key regexp and/or column data filter.
+   * @return scanner
+   * @throws IOException
+   */
+  public Scanner getScanner(final byte [][] columns,
+    final byte [] startRow, long timestamp, RowFilterInterface filter)
+  throws IOException {
+    return new ClientScanner(columns, startRow, timestamp, filter);
+  }
+  
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @throws IOException
+   */
+  public void deleteAll(final byte [] row) throws IOException {
+    deleteAll(row, null);
+  }
+  
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public void deleteAll(final Text row) throws IOException {
+    deleteAll(row, null);
+  }
+  
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @throws IOException
+   */
+  public void deleteAll(final String row) throws IOException {
+    deleteAll(row, null);
+  }
+  
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @param column column to be deleted
+   * @throws IOException
+   */
+  public void deleteAll(final byte [] row, final byte [] column)
+  throws IOException {
+    deleteAll(row, column, HConstants.LATEST_TIMESTAMP);
+  }
+
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @param ts Delete all cells of the same timestamp or older.
+   * @throws IOException
+   */
+  public void deleteAll(final byte [] row, final long ts)
+  throws IOException {
+    deleteAll(row, null, ts);
+  }
+
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @param ts Delete all cells of the same timestamp or older.
+   * @throws IOException
+   */
+  public void deleteAll(final String row, final long ts)
+  throws IOException {
+    deleteAll(row, null, ts);
+  }
+
+  /**
+   * Completely delete the row's cells.
+   *
+   * @param row Key of the row you want to completely delete.
+   * @param ts Delete all cells of the same timestamp or older.
+   * @throws IOException
+   * @deprecated Use String or byte [] overload instead
+   */
+  public void deleteAll(final Text row, final long ts)
+  throws IOException {
+    deleteAll(row, null, ts);
+  }
+
+  /** 
+   * Delete all cells that match the passed row and column.
+   * @param row Row to update
+   * @param column name of column whose value is to be deleted
+   * @throws IOException 
+   * @deprecated Use String or byte [] overload instead
+   */
+  public void deleteAll(final Text row, final Text column) throws IOException {
+    deleteAll(row, column, HConstants.LATEST_TIMESTAMP);
+  }
+
+  /** 
+   * Delete all cells that match the passed row and column.
+   * @param row Row to update
+   * @param column name of column whose value is to be deleted
+   * @throws IOException 
+   */
+  public void deleteAll(final String row, final String column)
+  throws IOException {
+    deleteAll(row, column, HConstants.LATEST_TIMESTAMP);
+  }
+
+  /** 
+   * Delete all cells that match the passed row and column and whose
+   * timestamp is equal-to or older than the passed timestamp.
+   * @param row Row to update
+   * @param column name of column whose value is to be deleted
+   * @param ts Delete all cells of the same timestamp or older.
+   * @throws IOException 
+   * @deprecated Use String or byte [] overload instead
+   */
+  public void deleteAll(final Text row, final Text column, final long ts)
+  throws IOException {
+    deleteAll(row.getBytes(), column.getBytes(), ts);
+  }
+  
+  /** 
+   * Delete all cells that match the passed row and column and whose
+   * timestamp is equal-to or older than the passed timestamp.
+   * @param row Row to update
+   * @param column name of column whose value is to be deleted
+   * @param ts Delete all cells of the same timestamp or older.
+   * @throws IOException 
+   */
+  public void deleteAll(final String row, final String column, final long ts)
+  throws IOException {
+    deleteAll(Bytes.toBytes(row),
+      column != null? Bytes.toBytes(column): null, ts);
+  }
+
+  /** 
+   * Delete all cells that match the passed row and column and whose
+   * timestamp is equal-to or older than the passed timestamp.
+   * @param row Row to update
+   * @param column name of column whose value is to be deleted
+   * @param ts Delete all cells of the same timestamp or older.
+   * @throws IOException 
+   */
+  public void deleteAll(final byte [] row, final byte [] column, final long ts)

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