/**
* Copyright 2009 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.tableindexed;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Map;
import org.apache.hadoop.hbase.util.Bytes;
/** Creates indexed keys for a single column....
*
*/
public class SimpleIndexKeyGenerator implements IndexKeyGenerator {
private byte [] column;
public SimpleIndexKeyGenerator(byte [] column) {
this.column = column;
}
public SimpleIndexKeyGenerator() {
// For Writable
}
/** {@inheritDoc} */
public byte[] createIndexKey(byte[] rowKey, Map<byte[], byte[]> columns) {
return Bytes.add(columns.get(column), rowKey);
}
/** {@inheritDoc} */
public void readFields(DataInput in) throws IOException {
column = Bytes.readByteArray(in);
}
/** {@inheritDoc} */
public void write(DataOutput out) throws IOException {
Bytes.writeByteArray(out, column);
}
}
