Mercurial > hg > digilib-old
annotate servlet/src/digilib/image/ImageLoaderImageInfoDocuInfo.java @ 188:dde98eaf97ff
Servlet version 1.18b3 new Raster servlet
- new Raster servlet for rastering SVG graphics into PNG
- new SVGFile class and accompanying changes
- fixes in DocuDirectory for better handling of other file classes
| author | robcast |
|---|---|
| date | Fri, 28 Nov 2003 13:19:37 +0100 |
| parents | afe7ff98bb71 |
| children | 6221d688eab6 |
| rev | line source |
|---|---|
| 149 | 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 | |
| 159 | 23 import java.io.File; |
| 149 | 24 import java.io.IOException; |
| 25 import java.io.RandomAccessFile; | |
| 26 import java.util.Iterator; | |
| 27 | |
| 28 import javax.imageio.ImageIO; | |
| 29 import javax.imageio.ImageReader; | |
| 30 import javax.imageio.stream.ImageInputStream; | |
| 31 | |
| 181 | 32 import org.apache.log4j.Logger; |
|
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33 import org.marcoschmidt.image.ImageInfo; |
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34 |
| 156 | 35 import digilib.io.FileOpException; |
| 149 | 36 import digilib.io.FileOps; |
| 159 | 37 import digilib.io.ImageFile; |
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38 import digilib.io.ImageFileset; |
| 149 | 39 |
| 40 /** | |
| 41 * @author casties | |
| 42 * | |
| 43 */ | |
| 44 public class ImageLoaderImageInfoDocuInfo implements DocuInfo { | |
| 181 | 45 |
| 46 private Logger logger = Logger.getLogger(this.getClass()); | |
| 149 | 47 |
| 159 | 48 /* check image size and type and store in ImageFile f */ |
| 49 public boolean checkFile(ImageFile imgf) throws IOException { | |
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50 ImageFileset imgfs = imgf.getParent(); |
| 159 | 51 File f = imgf.getFile(); |
| 52 if (f == null) { | |
| 53 throw new IOException("File not found!"); | |
| 54 } | |
| 55 RandomAccessFile raf = new RandomAccessFile(f, "r"); | |
| 149 | 56 // set up ImageInfo object |
| 57 ImageInfo iif = new ImageInfo(); | |
| 58 iif.setInput(raf); | |
| 59 iif.setCollectComments(false); | |
| 60 iif.setDetermineImageNumber(false); | |
| 61 // try with ImageInfo first | |
| 62 if (iif.check()) { | |
| 63 ImageSize d = | |
| 64 new ImageSize(iif.getWidth(), iif.getHeight()); | |
| 159 | 65 imgf.setSize(d); |
| 66 imgf.setMimetype(iif.getMimeType()); | |
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67 if (imgfs != null) { |
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68 imgfs.setAspect(d); |
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69 } |
| 149 | 70 raf.close(); |
| 71 } else { | |
| 72 // else use ImageReader | |
| 73 ImageInputStream istream = ImageIO.createImageInputStream(raf); | |
| 74 Iterator readers = ImageIO.getImageReaders(istream); | |
| 75 //String ext = f.getName().substring(f.getName().lastIndexOf('.')+1); | |
| 76 //Iterator readers = ImageIO.getImageReadersBySuffix(ext); | |
| 156 | 77 if (! readers.hasNext()) { |
| 78 throw new FileOpException("ERROR: unknown image file format!"); | |
| 79 } | |
| 149 | 80 ImageReader reader = (ImageReader) readers.next(); |
| 81 /* are there more readers? */ | |
| 181 | 82 logger.debug("this reader: " + reader.getClass()); |
| 149 | 83 while (readers.hasNext()) { |
| 181 | 84 logger.debug("next reader: " + readers.next().getClass()); |
| 149 | 85 } |
| 86 reader.setInput(istream); | |
| 87 ImageSize d = | |
| 88 new ImageSize(reader.getWidth(0), reader.getHeight(0)); | |
| 159 | 89 imgf.setSize(d); |
| 149 | 90 String t = reader.getFormatName(); |
| 159 | 91 t = FileOps.mimeForFile(f); |
| 92 imgf.setMimetype(t); | |
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93 if (imgfs != null) { |
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94 imgfs.setAspect(d); |
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95 } |
| 149 | 96 // dispose the reader to free resources |
| 97 reader.dispose(); | |
| 98 } | |
| 99 return true; | |
| 100 } | |
| 101 | |
| 102 } |