| /* |
| * 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.phoenix.coprocessor; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.exceptions.DeserializationException; |
| import org.apache.hadoop.hbase.filter.FilterBase; |
| import org.apache.hadoop.hbase.util.Bytes; |
| |
| /** |
| * |
| * Matches rows that end with a given byte array suffix |
| * |
| * |
| * @since 3.0 |
| */ |
| public class SuffixFilter extends FilterBase { |
| protected byte[] suffix = null; |
| |
| public SuffixFilter(final byte[] suffix) { |
| this.suffix = suffix; |
| } |
| |
| @Override |
| public byte[] toByteArray() throws IOException { |
| return suffix; |
| } |
| |
| @Override |
| public ReturnCode filterKeyValue(Cell ignored) throws IOException { |
| return ReturnCode.INCLUDE; |
| } |
| |
| @Override |
| public boolean filterRowKey(byte[] buffer, int offset, int length) { |
| if (buffer == null || this.suffix == null) return true; |
| if (length < suffix.length) return true; |
| // if they are equal, return false => pass row |
| // else return true, filter row |
| // if we are passed the suffix, set flag |
| int cmp = Bytes.compareTo(buffer, offset + (length - this.suffix.length), |
| this.suffix.length, this.suffix, 0, this.suffix.length); |
| return cmp != 0; |
| } |
| |
| |
| public static SuffixFilter parseFrom(final byte [] pbBytes) throws DeserializationException { |
| return new SuffixFilter(pbBytes); |
| } |
| } |