public Rendition getRendition(Asset asset) {
List<Rendition> renditions = asset.getRenditions();
for (Rendition rendition : renditions) {
if (rendition.getName().startsWith("cq5dam.web.")) {
return rendition;
}
}
return asset.getOriginal();
}
public BufferedImage getImage(final Rendition rendition, final Dimension dim) throws IOException {
final Asset asset = rendition.getAsset();
final byte[] picture = (byte[]) extractMetadata(asset).getProperty(META_KEY_THUMBNAIL);
// if we have an embedded image
if (picture != null) {
return new Layer(new ByteArrayInputStream(picture), dim).getImage();
}
// according to the spec, a thumbnail representation of a document should be generated by
// default when the
// file is saved.
log.warn("Failed to retrieve thumbnail for {}", asset.getPath());
return null;
}
public ExtractedMetadata extractMetadata(final Asset asset) {
final ZipInputStream zis =
new ZipInputStream(new BufferedInputStream(asset.getOriginal().getStream()));
final ExtractedMetadata metadata = new ExtractedMetadata();
try {
readEntries(zis, metadata, asset);
} catch (Exception e) {
log.warn("Failed to extract metadata for {} reason: {}", asset.getPath(), e.getMessage());
log.debug("Stack Trace: ", e);
} finally {
IOUtils.closeQuietly(zis);
}
setMimetype(metadata, asset);
return metadata;
}
/* all private methods */
private void readEntries(
final ZipInputStream zis, final ExtractedMetadata metadata, final Asset asset)
throws Exception {
ZipEntry entry;
while ((entry = zis.getNextEntry()) != null) {
final String name = entry.getName();
if (name.equals(ENTRY_CORE) || name.equals(ENTRY_APP)) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
IOUtils.copy(zis, out);
// build xml document to extract meta info
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
documentBuilderFactory.setNamespaceAware(true);
Document document =
documentBuilderFactory
.newDocumentBuilder()
.parse(new ByteArrayInputStream(out.toByteArray()));
IOUtils.closeQuietly(out);
DocumentTraversal dt = (DocumentTraversal) document;
NodeIterator nit = dt.createNodeIterator(document, NodeFilter.SHOW_ELEMENT, null, true);
nit.nextNode(); // skip first node
Element next;
while ((next = (Element) nit.nextNode()) != null) {
metadata.setMetaDataProperty(next.getLocalName(), next.getTextContent());
}
} else if (name.equals(ENTRY_THUMBNAIL)) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
IOUtils.copy(zis, out);
metadata.setProperty(META_KEY_THUMBNAIL, out.toByteArray());
} finally {
IOUtils.closeQuietly(out);
}
} else if (name.equals(ENTRY_THUMBNAIL_EMF)) {
String mimeType = mimeTypeService.getMimeType(name);
AssetHandler handler = store.getAssetHandler(mimeType);
Rendition rend = asset.addRendition("thumbnail.emf", zis, mimeType);
BufferedImage img = handler.getImage(rend);
if (img != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
ImageIO.write(img, JPEG_FORMAT, baos);
baos.flush();
metadata.setProperty(META_KEY_THUMBNAIL, baos.toByteArray());
} finally {
IOUtils.closeQuietly(baos);
}
} else {
log.info("Cannot extract image from EMF format");
}
}
}
}
public ExtractedMetadata extractMetadata(final Asset asset) {
ExtractedMetadata metadata = new ExtractedMetadata();
log.debug("extractMetadata: start extracting asset [{}]", asset.getPath());
// extract metadata
final InputStream is = asset.getOriginal().getStream();
final ZipInputStream zis = new ZipInputStream(is);
final StringBuffer buffer = new StringBuffer();
int count = 0;
try {
ZipEntry entry;
while ((entry = zis.getNextEntry()) != null) {
if (!entry.isDirectory()) {
buffer.append(entry.getName()).append('\n');
count++;
}
zis.closeEntry();
}
metadata.setMetaDataProperty("Content", buffer.toString());
metadata.setMetaDataProperty("File Count", count);
} catch (IOException e) {
log.warn("extractMetadata: error while reading ZIP archive [{}]: ", asset.getPath(), e);
} catch (IllegalArgumentException iae) {
// bug#28534
log.warn("extractMetadata: error while reading ZIP entry [{}]: ", asset.getPath(), iae);
} finally {
IOUtils.closeQuietly(zis);
}
// Get XMP
execGenericProcessor(asset.getOriginal().getStream(), metadata);
setMimetype(metadata, asset);
return metadata;
}