Coverage Report

Coverage Report - org.apache.commons.io.filefilter.EmptyFileFilter

Classes in this File

100%

 /*
  * 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 accepts files or directories that are empty.
  * <p>
  * If the <code>File</code> is a directory it checks that
  * it contains no files.
  * <p>
  * Example, showing how to print out a list of the 
  * current directory's empty files/directories:
  *
  * <pre>
  * File dir = new File(".");
  * String[] files = dir.list( EmptyFileFilter.EMPTY );
  * for ( int i = 0; i &lt; files.length; i++ ) {
  *     System.out.println(files[i]);
  * }
  * </pre>
  *
  * <p>
  * Example, showing how to print out a list of the 
  * current directory's non-empty files/directories:
  *
  * <pre>
  * File dir = new File(".");
  * String[] files = dir.list( EmptyFileFilter.NOT_EMPTY );
  * for ( int i = 0; i &lt; files.length; i++ ) {
  *     System.out.println(files[i]);
  * }
  * </pre>
  *
  * @since Commons IO 1.3
  * @version $Revision: 587916 $
  */
 public class EmptyFileFilter extends AbstractFileFilter implements Serializable {
     
     /** Singleton instance of <i>empty</i> filter */
     public static final IOFileFilter EMPTY = new EmptyFileFilter();
     
     /** Singleton instance of <i>not-empty</i> filter */
     public static final IOFileFilter NOT_EMPTY = new NotFileFilter(EMPTY);
     
     /**
      * Restrictive consructor.
      */
     protected EmptyFileFilter() {
     }
     
     /**
      * Checks to see if the file is empty.
      * 
      * @param file  the file or directory to check
      * @return <code>true</code> if the file or directory
      *  is <i>empty</i>, otherwise <code>false</code>.
      */
     public boolean accept(File file) {
         if (file.isDirectory()) {
             File[] files = file.listFiles();
             return (files == null || files.length == 0);
         } else {
             return (file.length() == 0);
         }
     }
     
 }

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		* This filter accepts files or directories that are empty.
24		* <p>
25		* If the <code>File</code> is a directory it checks that
26		* it contains no files.
27		* <p>
28		* Example, showing how to print out a list of the
29		* current directory's empty files/directories:
30		*
31		* <pre>
32		* File dir = new File(".");
33		* String[] files = dir.list( EmptyFileFilter.EMPTY );
34		* for ( int i = 0; i < files.length; i++ ) {
35		* System.out.println(files[i]);
36		* }
37		* </pre>
38		*
39		* <p>
40		* Example, showing how to print out a list of the
41		* current directory's non-empty files/directories:
42		*
43		* <pre>
44		* File dir = new File(".");
45		* String[] files = dir.list( EmptyFileFilter.NOT_EMPTY );
46		* for ( int i = 0; i < files.length; i++ ) {
47		* System.out.println(files[i]);
48		* }
49		* </pre>
50		*
51		* @since Commons IO 1.3
52		* @version $Revision: 587916 $
53		*/
54		public class EmptyFileFilter extends AbstractFileFilter implements Serializable {
55
56		/** Singleton instance of <i>empty</i> filter */
57	1	public static final IOFileFilter EMPTY = new EmptyFileFilter();
58
59		/** Singleton instance of <i>not-empty</i> filter */
60	1	public static final IOFileFilter NOT_EMPTY = new NotFileFilter(EMPTY);
61
62		/**
63		* Restrictive consructor.
64		*/
65	1	protected EmptyFileFilter() {
66	1	}
67
68		/**
69		* Checks to see if the file is empty.
70		*
71		* @param file the file or directory to check
72		* @return <code>true</code> if the file or directory
73		* is <i>empty</i>, otherwise <code>false</code>.
74		*/
75		public boolean accept(File file) {
76	16	if (file.isDirectory()) {
77	8	File[] files = file.listFiles();
78	8	return (files == null \|\| files.length == 0);
79		} else {
80	8	return (file.length() == 0);
81		}
82		}
83
84		}