1/*
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.imageio.spi;
27
28import java.io.File;
29import java.io.InputStream;
30import java.io.IOException;
31import java.util.Locale;
32import javax.imageio.spi.ImageInputStreamSpi;
33import javax.imageio.stream.ImageInputStream;
34import javax.imageio.stream.FileCacheImageInputStream;
35import javax.imageio.stream.MemoryCacheImageInputStream;
36
37public class InputStreamImageInputStreamSpi extends ImageInputStreamSpi {
38
39    private static final String vendorName = "Oracle Corporation";
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,
63                                                      File cacheDir)
64        throws IOException {
65        if (input instanceof InputStream) {
66            InputStream is = (InputStream)input;
67
68            if (useCache) {
69                return new FileCacheImageInputStream(is, cacheDir);
70            } else {
71                return new MemoryCacheImageInputStream(is);
72            }
73        } else {
74            throw new IllegalArgumentException();
75        }
76    }
77}
78