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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.Serializable;
/**
* This filter produces a logical NOT of the filters specified.
*
* @since Commons IO 1.0
* @version $Revision: 591058 $ $Date: 2007-11-01 15:47:05 +0000 (Thu, 01 Nov 2007) $
*
* @author Stephen Colebourne
*/
public class NotFileFilter extends AbstractFileFilter implements Serializable {
/** The filter */
private final IOFileFilter filter;
/**
* Constructs a new file filter that NOTs the result of another filters.
*
* @param filter the filter, must not be null
* @throws IllegalArgumentException if the filter is null
*/
public NotFileFilter(IOFileFilter filter) {
if (filter == null) {
throw new IllegalArgumentException("The filter must not be null");
}
this.filter = filter;
}
/**
* Checks to see if both filters are true.
*
* @param file the File to check
* @return true if the filter returns false
*/
public boolean accept(File file) {
return ! filter.accept(file);
}
/**
* Checks to see if both filters are true.
*
* @param file the File directory
* @param name the filename
* @return true if the filter returns false
*/
public boolean accept(File file, String name) {
return ! filter.accept(file, name);
}
/**
* Provide a String representaion of this file filter.
*
* @return a String representaion
*/
public String toString() {
return super.toString() + "(" + filter.toString() + ")";
}
}
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