?? delegatefilefilter.java
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/*
* Copyright 2002-2004 The Apache Software Foundation.
*
* 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 org.apache.commons.io.filefilter;
import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
/**
* This class turns a Java FileFilter or FilenameFilter into an IO FileFilter.
*
* @since Commons IO 1.0
* @version $Revision: 155419 $ $Date: 2005-02-26 13:02:41 +0000 (Sat, 26 Feb 2005) $
*
* @author Henri Yandell
* @author Stephen Colebourne
*/
public class DelegateFileFilter extends AbstractFileFilter {
/** The Filename filter */
private FilenameFilter filenameFilter;
/** The File filter */
private FileFilter fileFilter;
/**
* Constructs a delegate file filter around an existing FilenameFilter.
*
* @param filter the filter to decorate
*/
public DelegateFileFilter(FilenameFilter filter) {
if (filter == null) {
throw new IllegalArgumentException("The FilenameFilter must not be null");
}
this.filenameFilter = filter;
}
/**
* Constructs a delegate file filter around an existing FileFilter.
*
* @param filter the filter to decorate
*/
public DelegateFileFilter(FileFilter filter) {
if (filter == null) {
throw new IllegalArgumentException("The FileFilter must not be null");
}
this.fileFilter = filter;
}
/**
* Checks the filter.
*
* @param file the file to check
* @return true if the filter matches
*/
public boolean accept(File file) {
if (fileFilter != null) {
return fileFilter.accept(file);
} else {
return super.accept(file);
}
}
/**
* Checks the filter.
*
* @param dir the directory
* @param name the filename in the directory
* @return true if the filter matches
*/
public boolean accept(File dir, String name) {
if (filenameFilter != null) {
return filenameFilter.accept(dir, name);
} else {
return super.accept(dir, name);
}
}
}
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