/*
* 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.io.IOException;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
public class HadoopFSUtil {
/**
* Returns PathFilter that passes all paths through.
*/
public static PathFilter getPassAllFilter() {
return new PathFilter() {
public boolean accept(Path arg0) {
return true;
}
};
}
/**
* Returns PathFilter that passes directories through.
*/
public static PathFilter getPassDirectoriesFilter(final FileSystem fs) {
return new PathFilter() {
public boolean accept(final Path path) {
try {
return fs.getFileStatus(path).isDir();
} catch (IOException ioe) {
return false;
}
}
};
}
/**
* Turns an array of FileStatus into an array of Paths.
*/
public static Path[] getPaths(FileStatus[] stats) {
if (stats == null) {
return null;
}
if (stats.length == 0) {
return new Path[0];
}
Path[] res = new Path[stats.length];
for (int i = 0; i < stats.length; i++) {
res[i] = stats[i].getPath();
}
return res;
}
}