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/*
* 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.commons.io.filefilter;
import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.Serializable;
import java.util.Objects;
/**
* This class turns a Java FileFilter or FilenameFilter into an IO FileFilter.
* <h2>Deprecating Serialization</h2>
* <p>
* <em>Serialization is deprecated and will be removed in 3.0.</em>
* </p>
*
* @since 1.0
* @see FileFilterUtils#asFileFilter(FileFilter)
* @see FileFilterUtils#asFileFilter(FilenameFilter)
*/
public class DelegateFileFilter extends AbstractFileFilter implements Serializable {
private static final long serialVersionUID = -8723373124984771318L;
/** The File filter */
private final FileFilter fileFilter;
/** The Filename filter */
private final FilenameFilter filenameFilter;
/**
* Constructs a delegate file filter around an existing FileFilter.
*
* @param fileFilter the filter to decorate
*/
public DelegateFileFilter(final FileFilter fileFilter) {
Objects.requireNonNull(fileFilter, "filter");
this.fileFilter = fileFilter;
this.filenameFilter = null;
}
/**
* Constructs a delegate file filter around an existing FilenameFilter.
*
* @param filenameFilter the filter to decorate
*/
public DelegateFileFilter(final FilenameFilter filenameFilter) {
Objects.requireNonNull(filenameFilter, "filter");
this.filenameFilter = filenameFilter;
this.fileFilter = null;
}
/**
* Checks the filter.
*
* @param file the file to check
* @return true if the filter matches
*/
@Override
public boolean accept(final File file) {
if (fileFilter != null) {
return fileFilter.accept(file);
}
return super.accept(file);
}
/**
* Checks the filter.
*
* @param dir the directory
* @param name the file name in the directory
* @return true if the filter matches
*/
@Override
public boolean accept(final File dir, final String name) {
if (filenameFilter != null) {
return filenameFilter.accept(dir, name);
}
return super.accept(dir, name);
}
/**
* Provide a String representation of this file filter.
*
* @return a String representation
*/
@Override
public String toString() {
final String delegate = fileFilter != null ? fileFilter.toString() : filenameFilter.toString();
return super.toString() + "(" + delegate + ")";
}
}
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