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.hdfs.protocol;
019
020import java.util.Arrays;
021
022/**
023 * Contains a list of paths corresponding to corrupt files and a cookie
024 * used for iterative calls to NameNode.listCorruptFileBlocks.
025 *
026 */
027public class CorruptFileBlocks {
028  // used for hashCode
029  private static final int PRIME = 16777619;
030
031  private String[] files;
032  private String cookie;
033
034  public CorruptFileBlocks() {
035    this(new String[0], "");
036  }
037
038  public CorruptFileBlocks(String[] files, String cookie) {
039    this.files = files;
040    this.cookie = cookie;
041  }
042
043  public String[] getFiles() {
044    return files;
045  }
046
047  public String getCookie() {
048    return cookie;
049  }
050
051  @Override
052  public boolean equals(Object obj) {
053    if (this == obj) {
054      return true;
055    }
056    if (!(obj instanceof CorruptFileBlocks)) {
057      return false;
058    }
059    CorruptFileBlocks other = (CorruptFileBlocks) obj;
060    return cookie.equals(other.cookie) &&
061      Arrays.equals(files, other.files);
062  }
063
064  
065  @Override
066  public int hashCode() {
067    int result = cookie.hashCode();
068
069    for (String file : files) {
070      result = PRIME * result + file.hashCode();
071    }
072
073    return result;
074  }
075}