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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.filter;
19  
20  import java.io.IOException;
21  
22  import org.apache.hadoop.hbase.Cell;
23  import org.apache.hadoop.hbase.exceptions.DeserializationException;
24  
25  public class FilterAllFilter extends FilterBase {
26  
27    public FilterAllFilter() {
28    }
29  
30    @Override
31    public ReturnCode filterKeyValue(Cell v) throws IOException {
32      return ReturnCode.SKIP;
33    }
34  
35    // Override here explicitly as the method in super class FilterBase might do a KeyValue recreate.
36    // See HBASE-12068
37    @Override
38    public Cell transformCell(Cell v) {
39      return v;
40    }
41  
42    @Override
43    public boolean hasFilterRow() {
44      return true;
45    }
46  
47    @Override
48    public boolean filterRow() throws IOException {
49      return true;
50    }
51  
52    public static FilterAllFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
53      // No options to parse, so why bother
54      return new FilterAllFilter();
55    }
56  
57    @Override
58    boolean areSerializedFieldsEqual(Filter o) {
59      if (o == this)
60        return true;
61      if (!(o instanceof FilterAllFilter))
62        return false;
63  
64      return true;
65    }
66  }