1 /*
2 * $RCSfile: ChannelImageInputStreamSpi.java,v $
3 *
4 *
5 * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * - Redistribution of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * - Redistribution in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * Neither the name of Sun Microsystems, Inc. or the names of
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * This software is provided "AS IS," without a warranty of any
24 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
25 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
27 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
28 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
29 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
30 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
31 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
32 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
33 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
34 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGES.
36 *
37 * You acknowledge that this software is not designed or intended for
38 * use in the design, construction, operation or maintenance of any
39 * nuclear facility.
40 *
41 * $Revision: 1.1 $
42 * $Date: 2005/02/11 05:01:53 $
43 * $State: Exp $
44 */
45 package com.github.jaiimageio.impl.stream;
46
47 import java.io.File;
48 import java.io.IOException;
49 import java.io.InputStream;
50 import java.nio.channels.Channels;
51 import java.nio.channels.FileChannel;
52 import java.nio.channels.ReadableByteChannel;
53 import java.util.Locale;
54
55 import javax.imageio.spi.ImageInputStreamSpi;
56 import javax.imageio.stream.FileCacheImageInputStream;
57 import javax.imageio.stream.ImageInputStream;
58 import javax.imageio.stream.MemoryCacheImageInputStream;
59
60 import com.github.jaiimageio.impl.common.PackageUtil;
61 import com.github.jaiimageio.stream.FileChannelImageInputStream;
62
63 public class ChannelImageInputStreamSpi extends ImageInputStreamSpi {
64 public ChannelImageInputStreamSpi() {
65 super(PackageUtil.getVendor(),
66 PackageUtil.getVersion(),
67 ReadableByteChannel.class);
68 }
69
70 public ImageInputStream createInputStreamInstance(Object input,
71 boolean useCache,
72 File cacheDir)
73 throws IOException {
74
75 if(input == null ||
76 !(input instanceof ReadableByteChannel)) {
77 throw new IllegalArgumentException("XXX");
78 }
79
80 ImageInputStream stream = null;
81
82 if(input instanceof FileChannel) {
83 stream = new FileChannelImageInputStream((FileChannel)input);
84 } else {
85 InputStream inStream =
86 Channels.newInputStream((ReadableByteChannel)input);
87
88 if(useCache) {
89 try {
90 stream = new FileCacheImageInputStream(inStream,
91 cacheDir);
92 } catch(IOException e) {
93 // Cache file could not be created.
94 }
95 }
96
97 if(stream == null) {
98 stream = new MemoryCacheImageInputStream(inStream);
99 }
100 }
101
102 return stream;
103 }
104
105 public String getDescription(Locale locale) {
106 return "NIO Channel ImageInputStream";
107 }
108 }
109