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149
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1 /* ImageLoaderImageInfoDocuInfo -- DocuInfo implementation using ImageInfo and ImageLoader API
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2
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3 Digital Image Library servlet components
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4
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5 Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2 of the License, or (at your
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10 option) any later version.
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11
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12 Please read license.txt for the full details. A copy of the GPL
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13 may be found at http://www.gnu.org/copyleft/lgpl.html
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 * Created on 11.06.2003
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20 */
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21 package digilib.image;
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22
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23 import ImageInfo;
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24
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25 import java.io.IOException;
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26 import java.io.RandomAccessFile;
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27 import java.util.Iterator;
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28
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29 import javax.imageio.ImageIO;
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30 import javax.imageio.ImageReader;
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31 import javax.imageio.stream.ImageInputStream;
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32
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33 import digilib.io.DocuFile;
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156
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34 import digilib.io.FileOpException;
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149
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35 import digilib.io.FileOps;
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36
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37 /**
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38 * @author casties
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39 *
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40 */
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41 public class ImageLoaderImageInfoDocuInfo implements DocuInfo {
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42
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43 /* check image size and type and store in DocuFile f */
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44 public boolean checkFile(DocuFile f) throws IOException {
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45 RandomAccessFile raf = new RandomAccessFile(f.getFile(), "r");
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46 // set up ImageInfo object
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47 ImageInfo iif = new ImageInfo();
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48 iif.setInput(raf);
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49 iif.setCollectComments(false);
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50 iif.setDetermineImageNumber(false);
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51 // try with ImageInfo first
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52 if (iif.check()) {
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53 ImageSize d =
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54 new ImageSize(iif.getWidth(), iif.getHeight());
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55 f.setSize(d);
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56 f.setMimetype(iif.getMimeType());
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57 raf.close();
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58 } else {
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59 // else use ImageReader
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60 ImageInputStream istream = ImageIO.createImageInputStream(raf);
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61 Iterator readers = ImageIO.getImageReaders(istream);
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62 //String ext = f.getName().substring(f.getName().lastIndexOf('.')+1);
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63 //Iterator readers = ImageIO.getImageReadersBySuffix(ext);
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156
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64 if (! readers.hasNext()) {
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65 throw new FileOpException("ERROR: unknown image file format!");
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66 }
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149
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67 ImageReader reader = (ImageReader) readers.next();
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68 /* are there more readers? */
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69 System.out.println("this reader: " + reader.getClass());
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70 while (readers.hasNext()) {
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71 System.out.println("next reader: " + readers.next().getClass());
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72 }
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73 reader.setInput(istream);
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74 ImageSize d =
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75 new ImageSize(reader.getWidth(0), reader.getHeight(0));
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76 f.setSize(d);
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77 String t = reader.getFormatName();
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78 t = FileOps.mimeForFile(f.getFile());
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79 f.setMimetype(t);
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80 // dispose the reader to free resources
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81 reader.dispose();
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82 }
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83 return true;
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84 }
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85
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86 }
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