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Java > Open Source Codes > org > openide > util > io > NullInputStream


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19 package org.openide.util.io;
20
21 import java.io.IOException JavaDoc;
22 import java.io.InputStream JavaDoc;
23
24
25 /**
26  * Input stream that is always empty.
27  * @author Ales Novak
28  */
29 public class NullInputStream extends InputStream JavaDoc {
30     /**
31      * True if attempting to read from the stream should throw an {@link IOException}.
32      * False to simply return end of file.
33      */
34     public boolean throwException;
35
36     /** Create an empty null input stream. */
37     public NullInputStream() {
38     }
39
40     public int read() throws IOException JavaDoc {
41         if (throwException) {
42             throw new IOException JavaDoc();
43         }
44
45         return -1;
46     }
47 }
48
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