001/**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.regionserver;
020
021import org.apache.hadoop.hbase.Cell;
022import org.apache.yetus.audience.InterfaceAudience;
023import org.apache.hadoop.hbase.filter.FilterBase;
024import org.apache.hadoop.hbase.mob.MobUtils;
025
026/**
027 * A filter that returns the cells which have mob reference tags. It's a server-side filter.
028 */
029@InterfaceAudience.Private
030class MobReferenceOnlyFilter extends FilterBase {
031
032  @Override
033  public ReturnCode filterCell(final Cell cell) {
034    if (null != cell) {
035      // If a cell with a mob reference tag, it's included.
036      if (MobUtils.isMobReferenceCell(cell)) {
037        return ReturnCode.INCLUDE;
038      }
039    }
040    return ReturnCode.SKIP;
041  }
042
043  @Override
044  public boolean equals(Object obj) {
045    if (!(obj instanceof MobReferenceOnlyFilter)) {
046      return false;
047    }
048    return obj == this;
049  }
050
051  @Override
052  public int hashCode() {
053    return super.hashCode();
054  }
055}