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.coprocessor.example;
019
020import java.io.IOException;
021import java.util.List;
022import org.apache.hadoop.hbase.ExtendedCell;
023import org.apache.hadoop.hbase.regionserver.InternalScanner;
024import org.apache.hadoop.hbase.regionserver.ScannerContext;
025import org.apache.yetus.audience.InterfaceAudience;
026
027/**
028 * A simple delegation for doing filtering on {@link InternalScanner}.
029 */
030@InterfaceAudience.Private
031public class DelegatingInternalScanner implements InternalScanner {
032
033  protected final InternalScanner scanner;
034
035  public DelegatingInternalScanner(InternalScanner scanner) {
036    this.scanner = scanner;
037  }
038
039  @Override
040  public boolean next(List<? super ExtendedCell> result, ScannerContext scannerContext)
041    throws IOException {
042    return scanner.next(result, scannerContext);
043  }
044
045  @Override
046  public void close() throws IOException {
047    scanner.close();
048  }
049}