01: /*
02: * Copyright 2000-2001 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package com.sun.imageio.spi;
27:
28: import java.io.File;
29: import java.io.InputStream;
30: import java.io.IOException;
31: import java.util.Locale;
32: import javax.imageio.spi.ImageInputStreamSpi;
33: import javax.imageio.stream.ImageInputStream;
34: import javax.imageio.stream.FileCacheImageInputStream;
35: import javax.imageio.stream.MemoryCacheImageInputStream;
36:
37: public class InputStreamImageInputStreamSpi extends ImageInputStreamSpi {
38:
39: private static final String vendorName = "Sun Microsystems, Inc.";
40:
41: private static final String version = "1.0";
42:
43: private static final Class inputClass = InputStream.class;
44:
45: public InputStreamImageInputStreamSpi() {
46: super (vendorName, version, inputClass);
47: }
48:
49: public String getDescription(Locale locale) {
50: return "Service provider that instantiates a FileCacheImageInputStream or MemoryCacheImageInputStream from an InputStream";
51: }
52:
53: public boolean canUseCacheFile() {
54: return true;
55: }
56:
57: public boolean needsCacheFile() {
58: return false;
59: }
60:
61: public ImageInputStream createInputStreamInstance(Object input,
62: boolean useCache, File cacheDir) throws IOException {
63: if (input instanceof InputStream) {
64: InputStream is = (InputStream) input;
65:
66: if (useCache) {
67: return new FileCacheImageInputStream(is, cacheDir);
68: } else {
69: return new MemoryCacheImageInputStream(is);
70: }
71: } else {
72: throw new IllegalArgumentException();
73: }
74: }
75: }
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