src/java/org/apache/nutch/util/SegmentReaderUtil.java

/*
 * 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.nutch.util;

import java.util.Arrays;
import java.io.IOException;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.conf.Configuration;

public class SegmentReaderUtil{
  
  public static SequenceFile.Reader[] getReaders(Path dir, Configuration conf) throws IOException{
    FileSystem fs = dir.getFileSystem(conf);
    Path[] names = FileUtil.stat2Paths(fs.listStatus(dir));
    Arrays.sort(names);
    SequenceFile.Reader[] parts = new SequenceFile.Reader[names.length];
    for (int i = 0; i < names.length; i++) {
      parts[i] = new SequenceFile.Reader(conf, SequenceFile.Reader.file(names[i]));
    }
    return parts;
  }

}