svn commit: r713666 - in /incubator/hama/trunk/src/java/org/apache/hama/util: BytesUtil.java Numeric.java

[ed...@apache.org]

Author: edwardyoon
Date: Wed Nov 12 22:57:41 2008
New Revision: 713666

URL: http://svn.apache.org/viewvc?rev=713666&view=rev
Log: (empty)

Added:
    incubator/hama/trunk/src/java/org/apache/hama/util/BytesUtil.java
Removed:
    incubator/hama/trunk/src/java/org/apache/hama/util/Numeric.java

Added: incubator/hama/trunk/src/java/org/apache/hama/util/BytesUtil.java
URL: http://svn.apache.org/viewvc/incubator/hama/trunk/src/java/org/apache/hama/util/BytesUtil.java?rev=713666&view=auto
==============================================================================
--- incubator/hama/trunk/src/java/org/apache/hama/util/BytesUtil.java (added)
+++ incubator/hama/trunk/src/java/org/apache/hama/util/BytesUtil.java Wed Nov 12 22:57:41 2008
@@ -0,0 +1,122 @@
+/**
+ * Copyright 2007 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.hama.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.nio.ByteBuffer;
+
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hama.Constants;
+import org.apache.hama.SubMatrix;
+
+/**
+ * Provides a bytes utility
+ */
+public class BytesUtil {
+  public static final int SIZEOF_DOUBLE = Double.SIZE/Byte.SIZE;
+  
+  /**
+   * Bytes to integer conversion
+   * 
+   * @param bytes
+   * @return the converted value
+   */
+  public static int bytesToInt(byte[] bytes) {
+    return Integer.parseInt(Bytes.toString(bytes));
+  }
+
+  /**
+   * Integer to bytes conversion
+   * 
+   * @param integer
+   * @return the converted value
+   */
+  public static byte[] intToBytes(int integer) {
+    return Bytes.toBytes(String.valueOf(integer));
+  }
+
+  /**
+   * Bytes to double conversion
+   * 
+   * @param bytes
+   * @return the converted value
+   */
+  public static double bytesToDouble(byte[] bytes) {
+    return ByteBuffer.wrap(bytes).getDouble();
+  }
+
+  /**
+   * Double to bytes conversion
+   * 
+   * @param value
+   * @return the converted value
+   */
+  public static byte[] doubleToBytes(Double value) {
+    // If HBASE-884 done, we should change it.
+    return ByteBuffer.allocate(SIZEOF_DOUBLE).putDouble(value).array();
+  }
+
+  /**
+   * Gets the column index
+   * 
+   * @param bytes
+   * @return the converted value
+   */
+  public static int getColumnIndex(byte[] bytes) {
+    String cKey = new String(bytes);
+    return Integer.parseInt(cKey
+        .substring(cKey.indexOf(":") + 1, cKey.length()));
+  }
+
+  /**
+   * Gets the column index
+   * 
+   * @param integer
+   * @return the converted value
+   */
+  public static byte[] getColumnIndex(int integer) {
+    return Bytes.toBytes(Constants.COLUMN + String.valueOf(integer));
+  }
+  
+  public static byte[] subMatrixToBytes(Object obj) throws IOException {
+    ByteArrayOutputStream bos = new ByteArrayOutputStream();
+    ObjectOutputStream oos = new ObjectOutputStream(bos);
+    oos.writeObject(obj);
+    oos.flush();
+    oos.close();
+    bos.close();
+    byte[] data = bos.toByteArray();
+    return data;
+  }
+  
+  public static SubMatrix bytesToSubMatrix(byte[] value) throws IOException,
+      ClassNotFoundException {
+    ByteArrayInputStream bos = new ByteArrayInputStream(value);
+    ObjectInputStream oos = new ObjectInputStream(bos);
+    Object obj = oos.readObject();
+    oos.close();
+    bos.close();
+    return (SubMatrix) obj;
+  }
+}