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Java > Open Source Codes > org > openlaszlo > iv > flash > url > BufferedUrl


1 /*
2  * $Id: BufferedUrl.java,v 1.2 2002/02/15 23:44:28 skavish Exp $
3  *
4  * ==========================================================================
5  *
6  * The JGenerator Software License, Version 1.0
7  *
8  * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution, if
22  * any, must include the following acknowlegement:
23  * "This product includes software developed by Dmitry Skavish
24  * (skavish@usa.net, http://www.flashgap.com/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The name "The JGenerator" must not be used to endorse or promote
29  * products derived from this software without prior written permission.
30  * For written permission, please contact skavish@usa.net.
31  *
32  * 5. Products derived from this software may not be called "The JGenerator"
33  * nor may "The JGenerator" appear in their names without prior written
34  * permission of Dmitry Skavish.
35  *
36  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39  * DISCLAIMED. IN NO EVENT SHALL DMITRY SKAVISH OR THE OTHER
40  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47  * SUCH DAMAGE.
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49  */
50
51 package org.openlaszlo.iv.flash.url;
52
53 import java.io.*;
54 import java.net.*;
55 import java.util.*;
56 import org.openlaszlo.iv.flash.api.*;
57 import org.openlaszlo.iv.flash.util.*;
58
59 /**
60  * Buffered url
61  * <P>
62  * This class reads data from url and caches them in a buffer
63  *
64  * @author Dmitry Skavish
65  */
66 public class BufferedUrl extends IVUrl {
67
68     private FlashBuffer fb;
69     private IVUrl url;
70
71     /**
72      * Creates buffered url from specified IVUrl
73      *
74      * @param url specified url
75      * @exception IOException
76      */
77     public BufferedUrl( IVUrl url ) throws IOException {
78         this.url = url;
79         this.fb = Util.readUrl( url );
80     }
81
82     /**
83      * Creates buffered url from specified url and flash file
84      *
85      * @param file flash file in which context to create url
86      * @param surl specified url
87      * @exception IOException
88      */
89     public BufferedUrl( String JavaDoc surl, FlashFile file ) throws IOException, IVException {
90         this.url = IVUrl.newUrl(surl, file);
91         this.fb = Util.readUrl( url );
92     }
93
94     /**
95      * Creates buffered url from buffer
96      *
97      * @param fb buffer of data
98      */
99     public BufferedUrl( FlashBuffer fb ) {
100         this.fb = fb;
101     }
102
103     public FlashBuffer getFlashBuffer() {
104         return fb;
105     }
106
107     public String JavaDoc getName() {
108         return "fgbuffer:///"+hashCode();
109     }
110
111     public InputStream getInputStream() throws IOException {
112         return fb.getInputStream();
113     }
114
115     public String JavaDoc getParameter( String JavaDoc name ) {
116         if( url == null ) return super.getParameter( name );
117         return url.getParameter( name );
118     }
119
120     public long lastModified() {
121         if( url == null ) return super.lastModified();
122         return url.lastModified();
123     }
124
125     public void refresh() {
126         if( url == null ) {
127             super.refresh();
128         } else {
129             url.refresh();
130         }
131     }
132
133     public String JavaDoc getRef() {
134         if( url == null ) return super.getRef();
135         return url.getRef();
136     }
137
138 }
139
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