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Java > Open Source Codes > com > hp > hpl > jena > shared > wg > LazyZipEntryInputStream


1 /*
2  * (c) Copyright 2000, 2001, 2002, 2003, 2004, 2005 Hewlett-Packard Development Company, LP
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  * derived from this software without specific prior written permission.
15  
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  *
27  *
28  * LazyZipEntryInputStream.java
29  *
30  * Created on November 28, 2001, 11:38 AM
31  */
32
33 package com.hp.hpl.jena.shared.wg;
34
35
36 import java.io.*;
37 import java.util.zip.*;
38
39 /**
40  *In test cases we cannot open all the input files
41  * while creating the test suite, but must defer the
42  * opening until the test is actually run.
43  * @author jjc
44  */
45 class LazyZipEntryInputStream extends LazyInputStream {
46
47     private ZipEntry entry;
48     private ZipFile zip;
49     /** Creates new LazyZipEntryInputStream */
50     LazyZipEntryInputStream(ZipFile zip,String JavaDoc name) {
51       // System.err.println(name);
52 entry = new ZipEntry(name);
53         this.zip = zip;
54     }
55     
56     
57     InputStream open() throws IOException {
58         InputStream rslt = zip.getInputStream(entry);
59         if ( rslt == null )
60           throw new IllegalArgumentException JavaDoc(entry.getName()+ " cannot be opened.");
61         return rslt;
62     }
63     
64     
65
66 }
67
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