* org.exist.xquery.value.Sequence)
*/
public Sequence eval(Sequence[] args, Sequence contextSequence)
throws XPathException {
ValueSequence result = new ValueSequence();
// boolean isDatabasePath = false;
boolean isSaveToDataBase = false;
if (args[0].isEmpty()) {
return Sequence.EMPTY_SEQUENCE;
}
AnyURIValue picturePath = (AnyURIValue) args[0].itemAt(0);
if (picturePath.getStringValue().startsWith("xmldb:exist://")) {
picturePath = new AnyURIValue(picturePath.getStringValue()
.substring(14));
}
AnyURIValue thumbPath = null;
if (args[1].isEmpty()) {
thumbPath = new AnyURIValue(picturePath.toXmldbURI().append(
THUMBPATH));
isSaveToDataBase = true;
} else {
thumbPath = (AnyURIValue) args[1].itemAt(0);
if (thumbPath.getStringValue().startsWith("file:")) {
isSaveToDataBase = false;
thumbPath = new AnyURIValue(thumbPath.getStringValue().substring(5));
} else {
isSaveToDataBase = true;
try {
XmldbURI thumbsURI = XmldbURI.xmldbUriFor(thumbPath.getStringValue());
if (!thumbsURI.isAbsolute())
thumbsURI = picturePath.toXmldbURI().append(thumbPath.toString());
thumbPath = new AnyURIValue(thumbsURI.toString());
} catch (URISyntaxException e) {
throw new XPathException(this, e.getMessage());
}
}
}
// result.add(new StringValue(picturePath.getStringValue()));
// result.add(new StringValue(thumbPath.getStringValue() + " isDB?= "
// + isSaveToDataBase));
int maxThumbHeight = MAXTHUMBHEIGHT;
int maxThumbWidth = MAXTHUMBWIDTH;
if (!args[2].isEmpty()) {
maxThumbHeight = ((IntegerValue) args[2].itemAt(0)).getInt();
if (args[2].hasMany())
maxThumbWidth = ((IntegerValue) args[2].itemAt(1)).getInt();
}
String prefix = THUMBPREFIX;
if (!args[3].isEmpty()) {
prefix = args[3].itemAt(0).getStringValue();
}
// result.add(new StringValue("maxThumbHeight = " + maxThumbHeight
// + ", maxThumbWidth = " + maxThumbWidth));
DBBroker dbbroker = context.getBroker();
BrokerPool pool = null;
try {
pool = BrokerPool.getInstance();
} catch (Exception e) {
result.add(new StringValue(e.getMessage()));
return result;
}
TransactionManager transact = pool.getTransactionManager();
// Start transaction
Txn transaction = transact.beginTransaction();
Collection thumbCollection = null;
File thumbDir = null;
if (isSaveToDataBase) {
try {
thumbCollection = dbbroker.getOrCreateCollection(transaction,
thumbPath.toXmldbURI());
dbbroker.saveCollection(transaction, thumbCollection);
} catch (Exception e) {
throw new XPathException(this, e.getMessage());
}
} else {
thumbDir = new File(thumbPath.toString());
if (!thumbDir.isDirectory())
try {
thumbDir.mkdirs();
} catch (Exception e) {
throw new XPathException(this, e.getMessage());
}
}
Collection allPictures = null;
Collection existingThumbsCol = null;
File[] existingThumbsArray = null;
try {
allPictures = dbbroker.getCollection(picturePath.toXmldbURI());
if (allPictures == null) {
return Sequence.EMPTY_SEQUENCE;
}
if (isSaveToDataBase) {
existingThumbsCol = dbbroker.getCollection(thumbPath.toXmldbURI());
} else {
existingThumbsArray = thumbDir.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return (name.endsWith(".jpeg") || name.endsWith(".jpg"));
}
});
}
} catch (PermissionDeniedException pde) {
throw new XPathException(pde.getMessage(), pde);
}
DocumentImpl docImage = null;
BinaryDocument binImage = null;
@SuppressWarnings("unused")
BinaryDocument doc = null;
BufferedImage bImage = null;
@SuppressWarnings("unused")
byte[] imgData = null;
Image image = null;
ByteArrayOutputStream os = null;
try {
Iterator<DocumentImpl> i = allPictures.iterator(dbbroker);
while (i.hasNext()) {
docImage = (DocumentImpl) i.next();
// is not already existing??
if (!((fileExist(context.getBroker(), existingThumbsCol, docImage, prefix)) || (fileExist(
existingThumbsArray, docImage, prefix)))) {
if (docImage.getResourceType() == DocumentImpl.BINARY_FILE)
// TODO maybe extends for gifs too.
if (docImage.getMetadata().getMimeType().startsWith(
"image/jpeg")) {
binImage = (BinaryDocument) docImage;
// get a byte array representing the image
try {
InputStream is = dbbroker.getBinaryResource(binImage);
image = ImageIO.read(is);
} catch (IOException ioe) {
throw new XPathException(this,ioe.getMessage());
}
try {
bImage = ImageModule.createThumb(image, maxThumbHeight,
maxThumbWidth);
} catch (Exception e) {
throw new XPathException(this, e.getMessage());
}
if (isSaveToDataBase) {
os = new ByteArrayOutputStream();
try {
ImageIO.write(bImage, "jpg", os);
} catch (Exception e) {
throw new XPathException(this, e.getMessage());
}
try {
doc = thumbCollection.addBinaryResource(
transaction, dbbroker,
XmldbURI.create(prefix
+ docImage.getFileURI()), os
.toByteArray(), "image/jpeg");
} catch (Exception e) {
throw new XPathException(this, e.getMessage());
}
// result.add(new
// StringValue(""+docImage.getFileURI()+"|"+thumbCollection.getURI()+THUMBPREFIX
// + docImage.getFileURI()));
} else {
try {
ImageIO
.write(
bImage,
"jpg",
new File(thumbPath.toString()
+ "/" + prefix
+ docImage.getFileURI()));
} catch (Exception e) {
throw new XPathException(this, e.getMessage());
}
// result.add(new StringValue(
// thumbPath.toString() + "/"
// + THUMBPREFIX
// + docImage.getFileURI()));
}
}
} else {
// result.add(new StringValue(""+docImage.getURI()+"|"
// + ((existingThumbsCol != null) ? ""
// + existingThumbsCol.getURI() : thumbDir
// .toString()) + "/" + prefix
// + docImage.getFileURI()));
result.add(new StringValue(docImage.getFileURI().toString()));
}
}
} catch(PermissionDeniedException pde) {
throw new XPathException(this, pde.getMessage(), pde);
}