// *
public final ImageRecord getMetadata(BufferedImage bi) throws DjatokaException {
if (bi == null) throw new DjatokaException("Image Does Not Exist");
logger.debug("getMetadata(BufferedImage): " + bi.getWidth());
try {
ImageRecord r = new ImageRecord();
r.setWidth(bi.getWidth());
r.setHeight(bi.getHeight());
r.setDWTLevels(DEFAULT_LEVELS);
r.setLevels(DEFAULT_LEVELS);
r.setBitDepth(bi.getColorModel().getPixelSize());
r.setNumChannels(bi.getColorModel().getNumColorComponents());
// r.setCompositingLayerCount(getNumberOfPages(r)); // 'bi' refers to just one page extracted
// from the PDF file.
// logger.debug("r2: "+r.toString());
// TODO
return r;
} catch (Exception e) {
throw new DjatokaException(e);
}
}
/**
* Returns PDF props in ImageRecord
*
* @param r ImageRecord containing absolute file path of PDF file.
* @return a populated ImageRecord object
* @throws DjatokaException
*/
@Override
public final ImageRecord getMetadata(ImageRecord r) throws DjatokaException {
if ((r.getImageFile() == null || !new File(r.getImageFile()).exists()) && r.getObject() == null)
throw new DjatokaException("Image Does Not Exist: " + r.toString());
logger.debug("Get metadata: " + r.toString());
try {
DjatokaDecodeParam params = new DjatokaDecodeParam();
BufferedImage bi = process(r, params);
r.setWidth(bi.getWidth());
r.setHeight(bi.getHeight());
r.setDWTLevels(DEFAULT_LEVELS);
r.setLevels(DEFAULT_LEVELS);
r.setBitDepth(bi.getColorModel().getPixelSize());
r.setNumChannels(bi.getColorModel().getNumColorComponents());
// r.setCompositingLayerCount(getNumberOfPages(r)); // Semantics: number of pages in the PDF
// file.
HashMap<String, String> pdfProps = (HashMap<String, String>) getPDFProperties(r);
int n = Integer.parseInt(pdfProps.remove("Pages"));
r.setCompositingLayerCount(n);
// Since it is not possible for the viewer to query about a specific page's width and height
// (because in Djatoka's point of view a PDF is just one image with various compositing
// layers, which are the pages),
// at this point right here we query the PDF file about the size of all pages and store this
// information in a Map. This map can be returned by getMetadata by setting it as the
// instProps member of the
// ImageRecord class, which Djatoka already implements and which is returned as JSON to the
// viewer JS.
// The viewer then has to store this information and later query it instead of asking Djatoka
// (getMetadata) again.
// Map<String, String> instProps = getPagesSizes(r);
r.setInstProps(pdfProps);
logger.debug("instProps: " + r.getInstProps());
logger.debug("Get metadata: " + r.toString());
} catch (Exception e) {
throw new DjatokaException(e);
}
return r;
}
