com.epam.deltix.util.io.NonCachingSearchPathResolver Maven / Gradle / Ivy
/*
* Copyright 2021 EPAM Systems, Inc
*
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. Licensed 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 com.epam.deltix.util.io;
import java.io.*;
/**
* Searches for files under a set of root directories. This class
* does not try to create and cache a map of all directories, so it
* will be inefficient in the rare instances when the number of
* roots is really large.
*/
public class NonCachingSearchPathResolver implements FilenameResolver {
private File [] mRoots;
/**
* @param roots A set of directories that are sequentially
* searched for the specified files.
*/
public NonCachingSearchPathResolver (File ... roots) {
mRoots = roots;
}
public File find (String relPath) throws IOException {
for (File root : mRoots) {
File test = new File (root, relPath);
if (test.exists ())
return (test);
}
return (null);
}
public InputStream open (String relPath) throws IOException {
File f = find (relPath);
return (f == null ? null : new FileInputStream (f));
}
}