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HBASE-2968 No standard family filter provided 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1023192 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2010-10-16 05:53:32 +00:00
parent cd9a0cb473
commit f586cbeb57
1 changed files with 67 additions and 0 deletions
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src/main/java/org/apache/hadoop/hbase/filter/FamilyFilter.java Normal file
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/**
* Copyright 2010 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.filter;
import org.apache.hadoop.hbase.KeyValue;
/**
* This filter is used to filter based on the column family. It takes an
* operator (equal, greater, not equal, etc) and a byte [] comparator for the
* column family portion of a key.
* <p/>
* This filter can be wrapped with {@link org.apache.hadoop.hbase.filter.WhileMatchFilter} and {@link org.apache.hadoop.hbase.filter.SkipFilter}
* to add more control.
* <p/>
* Multiple filters can be combined using {@link org.apache.hadoop.hbase.filter.FilterList}.
* <p/>
* If an already known column family is looked for, use {@link org.apache.hadoop.hbase.client.Get#addFamily(byte[])}
* directly rather than a filter.
*/
public class FamilyFilter extends CompareFilter {
/**
* Writable constructor, do not use.
*/
public FamilyFilter() {
}
/**
* Constructor.
*
* @param familyCompareOp the compare op for column family matching
* @param familyComparator the comparator for column family matching
*/
public FamilyFilter(final CompareOp familyCompareOp,
final WritableByteArrayComparable familyComparator) {
super(familyCompareOp, familyComparator);
}
@Override
public ReturnCode filterKeyValue(KeyValue v) {
int familyLength = v.getFamilyLength();
if (familyLength > 0) {
if (doCompare(this.compareOp, this.comparator, v.getBuffer(),
v.getFamilyOffset(), familyLength)) {
return ReturnCode.SKIP;
}
}
return ReturnCode.INCLUDE;
}
}