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annotate servlet/src/digilib/image/ImageInfoDocuImage.java @ 836:abd5513ef7b2 stream

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fixed NPE in ImageInfoDocuImage.identify()
author robcast
date Tue, 01 Mar 2011 17:38:46 +0100
parents a23c4c15a6a8
children
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1 /**
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2 *
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3 */
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4 package digilib.image;
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5
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6 import java.io.IOException;
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7 import java.io.RandomAccessFile;
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8
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9 import org.marcoschmidt.image.ImageInfo;
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10
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11 import digilib.io.ImageInput;
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12 import digilib.util.ImageSize;
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13
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14 /** Simple abstract implementation of the <code>DocuImage</code> interface.
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15 * Implements only the identify method using the ImageInfo class.
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16 * @author casties
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17 *
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18 */
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19 public abstract class ImageInfoDocuImage extends DocuImageImpl {
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20
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21 /* Check image size and type and store in ImageFile f */
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22 public ImageInput identify(ImageInput ii) throws IOException {
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23 logger.debug("identifying (ImageInfo) " + ii);
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24 RandomAccessFile raf = null;
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25 try {
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26 // set up ImageInfo object
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27 ImageInfo iif = new ImageInfo();
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28 if (ii.hasImageInputStream()) {
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29 iif.setInput(ii.getImageInputStream());
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30 } else if (ii.hasFile()) {
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31 raf = new RandomAccessFile(ii.getFile(), "r");
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32 iif.setInput(raf);
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33 } else {
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34 return null;
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35 }
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36 iif.setCollectComments(false);
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37 iif.setDetermineImageNumber(false);
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38 // try with ImageInfo first
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39 if (iif.check()) {
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40 ImageSize d = new ImageSize(iif.getWidth(), iif.getHeight());
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41 ii.setSize(d);
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42 ii.setMimetype(iif.getMimeType());
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43 logger.debug("image size: " + ii.getSize());
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44 return ii;
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45 }
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46 } catch (Exception e) {
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47 logger.debug("ImageInfoDocuimage unable to identify.", e);
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48 } finally {
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49 // close file, don't close stream(?)
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50 if (raf != null) {
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51 raf.close();
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52 }
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53 }
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54 return null;
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55 }
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56
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57
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58 }