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