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comparison servlet/src/digilib/image/ImageLoaderImageInfoDocuInfo.java @ 149:04ad64b2137a

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Servlet version 1.14b1 - better performance with thumbnails (really, this time :-) - new DocuInfo class - new Directory class - DocuFile uses String and Directory as data members - parameter rearrangements
author robcast
date Tue, 26 Aug 2003 22:28:43 +0200
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children 688ad0b8b0fa
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148:837a633a0407 149:04ad64b2137a
1 /* ImageLoaderImageInfoDocuInfo -- DocuInfo implementation using ImageInfo and ImageLoader API
2
3 Digital Image Library servlet components
4
5 Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2 of the License, or (at your
10 option) any later version.
11
12 Please read license.txt for the full details. A copy of the GPL
13 may be found at http://www.gnu.org/copyleft/lgpl.html
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 * Created on 11.06.2003
20 */
21 package digilib.image;
22
23 import ImageInfo;
24
25 import java.io.IOException;
26 import java.io.RandomAccessFile;
27 import java.util.Iterator;
28
29 import javax.imageio.ImageIO;
30 import javax.imageio.ImageReader;
31 import javax.imageio.stream.ImageInputStream;
32
33 import digilib.io.DocuFile;
34 import digilib.io.FileOps;
35
36 /**
37 * @author casties
38 *
39 */
40 public class ImageLoaderImageInfoDocuInfo implements DocuInfo {
41
42 /* check image size and type and store in DocuFile f */
43 public boolean checkFile(DocuFile f) throws IOException {
44 RandomAccessFile raf = new RandomAccessFile(f.getFile(), "r");
45 // set up ImageInfo object
46 ImageInfo iif = new ImageInfo();
47 iif.setInput(raf);
48 iif.setCollectComments(false);
49 iif.setDetermineImageNumber(false);
50 // try with ImageInfo first
51 if (iif.check()) {
52 ImageSize d =
53 new ImageSize(iif.getWidth(), iif.getHeight());
54 f.setSize(d);
55 f.setMimetype(iif.getMimeType());
56 raf.close();
57 } else {
58 // else use ImageReader
59 ImageInputStream istream = ImageIO.createImageInputStream(raf);
60 Iterator readers = ImageIO.getImageReaders(istream);
61 //String ext = f.getName().substring(f.getName().lastIndexOf('.')+1);
62 //Iterator readers = ImageIO.getImageReadersBySuffix(ext);
63 ImageReader reader = (ImageReader) readers.next();
64 /* are there more readers? */
65 System.out.println("this reader: " + reader.getClass());
66 while (readers.hasNext()) {
67 System.out.println("next reader: " + readers.next().getClass());
68 }
69 reader.setInput(istream);
70 ImageSize d =
71 new ImageSize(reader.getWidth(0), reader.getHeight(0));
72 f.setSize(d);
73 String t = reader.getFormatName();
74 t = FileOps.mimeForFile(f.getFile());
75 f.setMimetype(t);
76 // dispose the reader to free resources
77 reader.dispose();
78 }
79 return true;
80 }
81
82 }