/*
* 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: 1005099 $ $Date: 2010-10-06 12:13:01 -0400 (Wed, 06 Oct 2010) $
*
* @author Stephen Colebourne
* @see FileFilterUtils#notFileFilter(IOFileFilter)
*/
public class NotFileFilter extends AbstractFileFilter implements Serializable {
/** The filter */
private final IOFileFilter filter;
/**
* Constructs a new file filter that NOTs the result of another filter.
*
* @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;
}
/**
* Returns the logical NOT of the underlying filter's return value for the same File.
*
* @param file the File to check
* @return true if the filter returns false
*/
@Override
public boolean accept(File file) {
return ! filter.accept(file);
}
/**
* Returns the logical NOT of the underlying filter's return value for the same arguments.
*
* @param file the File directory
* @param name the filename
* @return true if the filter returns false
*/
@Override
public boolean accept(File file, String name) {
return ! filter.accept(file, name);
}
/**
* Provide a String representaion of this file filter.
*
* @return a String representaion
*/
@Override
public String toString() {
return super.toString() + "(" + filter.toString() + ")";
}
}
|