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      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one or more
      3  * contributor license agreements.  See the NOTICE file distributed with
      4  * this work for additional information regarding copyright ownership.
      5  * The ASF licenses this file to You under the Apache License, Version 2.0
      6  * (the "License"); you may not use this file except in compliance with
      7  * the License.  You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 package org.apache.commons.io.filefilter;
     18 
     19 import java.io.File;
     20 import java.io.Serializable;
     21 
     22 /**
     23  * A file filter that always returns true.
     24  *
     25  * @since Commons IO 1.0
     26  * @version $Revision: 587978 $ $Date: 2007-10-24 20:36:51 +0100 (Wed, 24 Oct 2007) $
     27  *
     28  * @author Stephen Colebourne
     29  */
     30 public class TrueFileFilter implements IOFileFilter, Serializable {
     31 
     32     /**
     33      * Singleton instance of true filter.
     34      * @since Commons IO 1.3
     35      */
     36     public static final IOFileFilter TRUE = new TrueFileFilter();
     37     /**
     38      * Singleton instance of true filter.
     39      * Please use the identical TrueFileFilter.TRUE constant.
     40      * The new name is more JDK 1.5 friendly as it doesn't clash with other
     41      * values when using static imports.
     42      */
     43     public static final IOFileFilter INSTANCE = TRUE;
     44 
     45     /**
     46      * Restrictive consructor.
     47      */
     48     protected TrueFileFilter() {
     49     }
     50 
     51     /**
     52      * Returns true.
     53      *
     54      * @param file  the file to check
     55      * @return true
     56      */
     57     public boolean accept(File file) {
     58         return true;
     59     }
     60 
     61     /**
     62      * Returns true.
     63      *
     64      * @param dir  the directory to check
     65      * @param name  the filename
     66      * @return true
     67      */
     68     public boolean accept(File dir, String name) {
     69         return true;
     70     }
     71 
     72 }
     73