svn commit: r1465782 - in /hbase/trunk: hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java hbase-server/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java

[ec...@apache.org]

Author: eclark
Date: Mon Apr  8 20:57:34 2013
New Revision: 1465782

URL: http://svn.apache.org/r1465782
Log:
HBASE-8293 Move BigDecimalColumnInterpreter into hbase-client

Added:
    hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java
Removed:
    hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java

Added: hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java
URL: http://svn.apache.org/viewvc/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java?rev=1465782&view=auto
==============================================================================
--- hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java (added)
+++ hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java Mon Apr  8 20:57:34 2013
@@ -0,0 +1,147 @@
+/*
+ *
+ * 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.coprocessor;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hbase.KeyValue;
+import org.apache.hadoop.hbase.coprocessor.ColumnInterpreter;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.BigDecimalMsg;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.EmptyMsg;
+import org.apache.hadoop.hbase.util.Bytes;
+
+import com.google.protobuf.ByteString;
+
+/**
+ * ColumnInterpreter for doing Aggregation's with BigDecimal columns. This class
+ * is required at the RegionServer also.
+ *
+ */
+@InterfaceAudience.Public
+@InterfaceStability.Evolving
+public class BigDecimalColumnInterpreter extends ColumnInterpreter<BigDecimal, BigDecimal,
+  EmptyMsg, BigDecimalMsg, BigDecimalMsg> {
+
+  @Override
+  public BigDecimal getValue(byte[] colFamily, byte[] colQualifier, KeyValue kv)
+      throws IOException {
+    if (kv == null || kv.getValue() == null) {
+      return null;
+    }
+    return Bytes.toBigDecimal(kv.getValue()).setScale(2, RoundingMode.HALF_EVEN);
+  }
+
+  @Override
+  public BigDecimal add(BigDecimal bd1, BigDecimal bd2) {
+    if (bd1 == null ^ bd2 == null) {
+      return (bd1 == null) ? bd2 : bd1; // either of one is null.
+    }
+    if (bd1 == null) {
+      return null;
+    }
+    return bd1.add(bd2);
+  }
+
+  @Override
+  public int compare(final BigDecimal bd1, final BigDecimal bd2) {
+    if (bd1 == null ^ bd2 == null) {
+      return bd1 == null ? -1 : 1; // either of one is null.
+    }
+    if (bd1 == null) {
+      return 0; // both are null
+    }
+    return bd1.compareTo(bd2); // natural ordering.
+  }
+
+  @Override
+  public BigDecimal getMaxValue() {
+    return BigDecimal.valueOf(Double.MAX_VALUE);
+  }
+
+  @Override
+  public BigDecimal increment(BigDecimal bd) {
+    return bd == null ? null : (bd.add(BigDecimal.ONE));
+  }
+
+  @Override
+  public BigDecimal multiply(BigDecimal bd1, BigDecimal bd2) {
+    return (bd1 == null || bd2 == null) ? null : bd1.multiply(bd2)
+        .setScale(2,RoundingMode.HALF_EVEN);
+  }
+
+  @Override
+  public BigDecimal getMinValue() {
+    return BigDecimal.valueOf(Double.MIN_VALUE);
+  }
+
+  @Override
+  public double divideForAvg(BigDecimal bd1, Long l2) {
+    return (l2 == null || bd1 == null) ? Double.NaN : (bd1.doubleValue() / l2
+        .doubleValue());
+  }
+
+  @Override
+  public BigDecimal castToReturnType(BigDecimal bd) {
+    return bd;
+  }
+
+  @Override
+  public BigDecimal castToCellType(BigDecimal bd) {
+    return bd;
+  }
+
+  @Override
+  public EmptyMsg getRequestData() {
+    return EmptyMsg.getDefaultInstance();
+  }
+
+  @Override
+  public void initialize(EmptyMsg msg) {
+    //nothing
+  }
+
+  private BigDecimalMsg getProtoForType(BigDecimal t) {
+    BigDecimalMsg.Builder builder = BigDecimalMsg.newBuilder();
+    return builder.setBigdecimalMsg(ByteString.copyFrom(Bytes.toBytes(t))).build();
+  }
+  
+  @Override
+  public BigDecimalMsg getProtoForCellType(BigDecimal t) {
+    return getProtoForType(t);
+  }
+
+  @Override
+  public BigDecimalMsg getProtoForPromotedType(BigDecimal s) {
+    return getProtoForType(s);
+  }
+
+  @Override
+  public BigDecimal getPromotedValueFromProto(BigDecimalMsg r) {
+    return Bytes.toBigDecimal(r.getBigdecimalMsg().toByteArray());
+  }
+
+  @Override
+  public BigDecimal getCellValueFromProto(BigDecimalMsg q) {
+    return Bytes.toBigDecimal(q.getBigdecimalMsg().toByteArray());
+  }
+}