001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.io.filefilter; 018 019 import java.io.File; 020 import java.io.Serializable; 021 022 /** 023 * This filter produces a logical NOT of the filters specified. 024 * 025 * @since Commons IO 1.0 026 * @version $Revision: 591058 $ $Date: 2007-11-01 15:47:05 +0000 (Thu, 01 Nov 2007) $ 027 * 028 * @author Stephen Colebourne 029 */ 030 public class NotFileFilter extends AbstractFileFilter implements Serializable { 031 032 /** The filter */ 033 private final IOFileFilter filter; 034 035 /** 036 * Constructs a new file filter that NOTs the result of another filters. 037 * 038 * @param filter the filter, must not be null 039 * @throws IllegalArgumentException if the filter is null 040 */ 041 public NotFileFilter(IOFileFilter filter) { 042 if (filter == null) { 043 throw new IllegalArgumentException("The filter must not be null"); 044 } 045 this.filter = filter; 046 } 047 048 /** 049 * Checks to see if both filters are true. 050 * 051 * @param file the File to check 052 * @return true if the filter returns false 053 */ 054 public boolean accept(File file) { 055 return ! filter.accept(file); 056 } 057 058 /** 059 * Checks to see if both filters are true. 060 * 061 * @param file the File directory 062 * @param name the filename 063 * @return true if the filter returns false 064 */ 065 public boolean accept(File file, String name) { 066 return ! filter.accept(file, name); 067 } 068 069 /** 070 * Provide a String representaion of this file filter. 071 * 072 * @return a String representaion 073 */ 074 public String toString() { 075 return super.toString() + "(" + filter.toString() + ")"; 076 } 077 078 }