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1
7
8 package com.sun.imageio.spi;
9
10 import java.io.File  ;
11 import java.io.InputStream ;
12 import java.io.IOException ;
13 import java.util.Locale ;
14 import javax.imageio.spi.ImageInputStreamSpi ;
15 import javax.imageio.stream.ImageInputStream ;
16 import javax.imageio.stream.FileCacheImageInputStream ;
17 import javax.imageio.stream.MemoryCacheImageInputStream ;
18
19 public class InputStreamImageInputStreamSpi extends ImageInputStreamSpi {
20
21 private static final String vendorName = "Sun Microsystems, Inc.";
22
23 private static final String version = "1.0";
24
25 private static final Class inputClass = InputStream .class;
26
27 public InputStreamImageInputStreamSpi() {
28 super(vendorName, version, inputClass);
29 }
30
31 public String getDescription(Locale locale) {
32 return "Service provider that instantiates a FileCacheImageInputStream or MemoryCacheImageInputStream from an InputStream";
33 }
34
35 public boolean canUseCacheFile() {
36 return true;
37 }
38
39 public boolean needsCacheFile() {
40 return false;
41 }
42
43 public ImageInputStream createInputStreamInstance(Object input,
44 boolean useCache,
45 File cacheDir)
46 throws IOException {
47 if (input instanceof InputStream ) {
48 InputStream is = (InputStream )input;
49
50 if (useCache) {
51 return new FileCacheImageInputStream (is, cacheDir);
52 } else {
53 return new MemoryCacheImageInputStream (is);
54 }
55 } else {
56 throw new IllegalArgumentException ();
57 }
58 }
59 }
60 |
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