+ private static final long serialVersionUID = -4156533490858298387L;;
+
+ /**
+ * Picture dimensions.
+ */
+ private Dimension dimensions;
+
+ public Picture(final File parentDirectory, final String fileName)
+ throws IOException, ImageFormatError {
+ super(parentDirectory, fileName);
+ }
+
+ private String computeThumbnailHash(final Dimension targetDimension) {
+
+ // compute new thumbnails hash number
+ final String forMagicHash = fileName + " "
+ + String.valueOf(targetDimension.width) + " "
+ + String.valueOf(targetDimension.height) + " "
+ + String.valueOf(getFileLength()) + " "
+ + Constants.THUMBNAIL_VERSION;
+
+ // System.out.println("Computing hash from: " + forMagicHash);
+ return Utils.getStringCrcAsHex(forMagicHash);
+ }
+
+ public Dimension getDimensions() {
+ return dimensions;
+ }
+
+ /**
+ * Get thumbnail file name for this image and desired thumbnail dimensions
+ * relative to designated thumbnails directory within parent directory.
+ */
+ public String getRelativeThumbnailFileName(final Dimension targetDimension) {
+ return FilePathParser.getFileNameWithoutExtension(fileName) + " ("
+ + computeThumbnailHash(targetDimension) + ").jpeg";
+ }
+
+ @Override
+ public void updateFileMetainfo(final File parentDirectory)
+ throws IOException {
+ BufferedImage image;
+ try {
+ image = Utils.getBufferedImage(getFile(parentDirectory));
+ } catch (final ImageFormatError e) {
+ throw new RuntimeException(e);
+ }
+ dimensions = new Dimension(image.getWidth(), image.getHeight());
+ }
+