I have been trying to find a way to write metadata to a PNG and I have tried quite alot.
I can read the data using the pngj library using:
PngReader pngr = new PngReader(file);
pngr.readSkippingAllRows(); // reads only metadata
for (PngChunk c : pngr.getChunksList().getChunks()) {
if (!ChunkHelper.isText(c)) continue;
PngChunkTextVar ct = (PngChunkTextVar) c;
String key = ct.getKey();
String val = ct.getVal();
System.out.print(key + " " + val + "\n" );
}
pngr.close();
And it works great. But I need to write to it.
I have tried:
public boolean writeCustomData(String key, String value) throws Exception {
PngReader pngr = new PngReader(currentImage);
PngWriter png = new PngWriter(new FileOutputStream(currentImage), pngr.imgInfo);
png.getMetadata().setText(key, value);
return true;
}
But this does nothing.
And I have tried using the answer from Writing image metadata in Java, preferably PNG
this works (kinda) but my read function cant see it.
If you want to add a chunk to the image, you must read and write the full image. Example
PngReader pngr = new PngReader(origFile);
PngWriter pngw = new PngWriter(destFile, pngr.imgInfo, true);
// instruct the writer to copy all ancillary chunks from source
pngw.copyChunksFrom(pngr.getChunksList(), ChunkCopyBehaviour.COPY_ALL);
// add a new textual chunk (can also be done after writing the rows)
pngw.getMetadata().setText("my key", "my val");
// copy all rows
for (int row = 0; row < pngr.imgInfo.rows; row++) {
IImageLine l1 = pngr.readRow();
pngw.writeRow(l1);
}
pngr.end();
pngw.end();
If you need more performance, you can read/write the chunks at a lower level, see this example.
Try this:
Stream pngStream = new System.IO.FileStream("smiley.png", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
PngBitmapDecoder pngDecoder = new PngBitmapDecoder(pngStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapFrame pngFrame = pngDecoder.Frames[0];
InPlaceBitmapMetadataWriter pngInplace = pngFrame.CreateInPlaceBitmapMetadataWriter();
if (pngInplace.TrySave() == true)
{
pngInplace.SetQuery("/Text/Description", "Have a nice day.");
}
pngStream.Close();
Related
I am trying to merge 2 docx files which has their own bullet number, after merging of word docs the bullets are automatically updated.
E.g:
Doc A has 1 2 3
Doc B has 1 2 3
After merging the bullet numbering are updated to be 1 2 3 4 5 6
how to stop this.
I am using following code
if(counter==1)
{
FirstFileByteStream = org.apache.commons.codec.binary.Base64.decodeBase64(strFileData.getBytes());
FirstFileIS = new java.io.ByteArrayInputStream(FirstFileByteStream);
FirstWordFile = org.docx4j.openpackaging.packages.WordprocessingMLPackage.load(FirstFileIS);
main = FirstWordFile.getMainDocumentPart();
//Add page break for Table of Content
main.addObject(objBr);
if (htmlCode != null) {
main.addAltChunk(org.docx4j.openpackaging.parts.WordprocessingML.AltChunkType.Html,htmlCode.toString().getBytes());
}
//Table of contents - End
}
else
{
FileByteStream = org.apache.commons.codec.binary.Base64.decodeBase64(strFileData.getBytes());
FileIS = new java.io.ByteArrayInputStream(FileByteStream);
byte[] bytes = IOUtils.toByteArray(FileIS);
AlternativeFormatInputPart afiPart = new AlternativeFormatInputPart(new PartName("/part" + (chunkCount++) + ".docx"));
afiPart.setContentType(new ContentType(CONTENT_TYPE));
afiPart.setBinaryData(bytes);
Relationship altChunkRel = main.addTargetPart(afiPart);
CTAltChunk chunk = Context.getWmlObjectFactory().createCTAltChunk();
chunk.setId(altChunkRel.getId());
main.addObject(objBr);
htmlCode = new StringBuilder();
htmlCode.append("<html>");
htmlCode.append("<h2><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><p style=\"font-family:'Arial Black'; color: #f35b1c\">"+ReqName+"</p></h2>");
htmlCode.append("</html>");
if (htmlCode != null) {
main.addAltChunk(org.docx4j.openpackaging.parts.WordprocessingML.AltChunkType.Html,htmlCode.toString().getBytes());
}
//Add Page Break before new content
main.addObject(objBr);
//Add new content
main.addObject(chunk);
}
Looking at your code, you are adding HTML altChunks to your document.
For these to display it Word, the HTML is converted to normal docx content.
An altChunk is usually converted by Word when you open the docx.
(Alternatively, docx4j-ImportXHTML can do it for an altChunk of type XHTML)
The upshot is that what happens with the bullets (when Word converts your HTML) is largely outside your control. You could experiment with CSS but I think Word will mostly ignore it.
An alternative may be to use XHTML altChunks, and have docx4j-ImportXHTML convert them. main.convertAltChunks()
If the same problem occurs when you try that, well, at least we can address it.
I was able to fix my issue using following code. I found it at (http://webapp.docx4java.org/OnlineDemo/forms/upload_MergeDocx.xhtml). You can also generate your custom code, they have a nice demo where they generate code according to your requirement :).
public final static String DIR_IN = System.getProperty("user.dir")+ "/";
public final static String DIR_OUT = System.getProperty("user.dir")+ "/";
public static void main(String[] args) throws Exception
{
String[] files = {"part1docx_20200717t173750539gmt.docx", "part1docx_20200717t173750539gmt (1).docx", "part1docx_20200717t173750539gmt.docx"};
List blockRanges = new ArrayList();
for (int i=0 ; i< files.length; i++) {
BlockRange block = new BlockRange(WordprocessingMLPackage.load(new File(DIR_IN + files[i])));
blockRanges.add( block );
block.setStyleHandler(StyleHandler.RENAME_RETAIN);
block.setNumberingHandler(NumberingHandler.ADD_NEW_LIST);
block.setRestartPageNumbering(false);
block.setHeaderBehaviour(HfBehaviour.DEFAULT);
block.setFooterBehaviour(HfBehaviour.DEFAULT);
block.setSectionBreakBefore(SectionBreakBefore.NEXT_PAGE);
}
// Perform the actual merge
DocumentBuilder documentBuilder = new DocumentBuilder();
WordprocessingMLPackage output = documentBuilder.buildOpenDocument(blockRanges);
// Save the result
SaveToZipFile saver = new SaveToZipFile(output);
saver.save(DIR_OUT+"OUT_MergeWholeDocumentsUsingBlockRange.docx");
}
I want to send some survey in PDF from java, I tryed different methods. I use with StringBuffer and without, but always see text in PDF in one row.
public void writePdf(OutputStream outputStream) throws Exception {
Paragraph paragraph = new Paragraph();
Document document = new Document();
PdfWriter.getInstance(document, outputStream);
document.open();
document.addTitle("Survey PDF");
ArrayList nameArrays = new ArrayList();
StringBuffer sb = new StringBuffer();
int i = -1;
for (String properties : textService.getAnswer()) {
nameArrays.add(properties);
i++;
}
for (int a= 0; a<=i; a++){
System.out.println("nameArrays.get(a) -"+nameArrays.get(a));
sb.append(nameArrays.get(a));
}
paragraph.add(sb.toString());
document.add(paragraph);
document.close();
}
textService.getAnswer() this - ArrayList<String>
Could you please advise how to separate the text in order each new sentence will be starting from new row?
Now I see like this:
You forgot the newline character \n and your code seems a bit overcomplicated.
Try this:
StringBuffer sb = new StringBuffer();
for (String property : textService.getAnswer()) {
sb.append(property);
sb.append('\n');
}
What about:
nameArrays.add(properties+"\n");
You might be able to fix that by simply appending "\n" to the strings that you collecting in your list; but I think: that very much depends on the PDF library you are using.
You see, "newlines" or "paragraphs" are to a certain degree about formatting. It seems like a conceptual problem to add that "formatting" information to the data that you are processing.
Meaning: you might want to check if your library allows you to provide strings - and then have the library do the formatting for you!
In other words: instead of giving strings with newlines; you should check if you can keep using strings without newlines, but if there is way to have the PDF library add line breaks were appropriate.
Side note on code quality: you are using raw types:
ArrayList nameArrays = new ArrayList();
should better be
ArrayList<String> names = new ArrayList<>();
[ I also changed the name - there is no point in putting the type of a collection into the variable name! ]
This method is for save values in array list into a pdf document. In the mfilePath variable "/" in here you can give folder name. As a example "/example/".
and also for mFileName variable you can use name. I give the date and time that document will created. don't give static name other vice your values are overriding in same pdf.
private void savePDF()
{
com.itextpdf.text.Document mDoc = new com.itextpdf.text.Document();
String mFileName = new SimpleDateFormat("YYYY-MM-DD-HH-MM-SS", Locale.getDefault()).format(System.currentTimeMillis());
String mFilePath = Environment.getExternalStorageDirectory() + "/" + mFileName + ".pdf";
try
{
PdfWriter.getInstance(mDoc, new FileOutputStream(mFilePath));
mDoc.open();
for(int d = 0; d < g; d++)
{
String mtext = answers.get(d);
mDoc.add(new Paragraph(mtext));
}
mDoc.close();
}
catch (Exception e)
{
}
}
I am trying to modify or add new tags with the iim4j library, but its documentation is poor. I've been searching for examples on the internet and didn't found anything so far. I only got the examples the library offers. There's one example about reading the Metadata and I can get the title, description and tags of the image (the ones I care). I know the library manage these info as DataSet and DataSetInfo so I tried to create new instances of these objects for the info I want to add but I have no results so far.
This is the code for reading the IPTC section of a jpeg file:
public static void dump(File file) throws Exception {
System.out.println("IPTC segment for " + file);
IIMFile iimFile = new IIMFile();
IIMReader reader = new IIMReader(new JPEGIIMInputStream(new FileIIMInputStream(file)), new IIMDataSetInfoFactory());
iimFile.readFrom(reader, 20);
for (Iterator i = iimFile.getDataSets().iterator(); i.hasNext();) {
DataSet ds = (DataSet) i.next();
Object value = ds.getValue();
if (value instanceof byte[]) {
value = "<bytes " + ((byte[]) value).length + ">";
}
DataSetInfo info = ds.getInfo();
if (info instanceof DefaultDataSetInfo)
{
System.out.println("-----------");
System.out.println("Number : " + info.getDataSetNumber());
System.out.println("Name :" + info.getName());
Serializer serializador=info.getSerializer();
if(serializador instanceof StringSerializer)
System.out.println("Serializer :" + serializador.toString());
System.out.println("Repeat : " + info.isRepeatable());
System.out.println("----------");
}
System.out.println(info.toString() + " " + info.getName() + ": " + value);
}
reader.close();
}
I can obtain all the info I need and also I know that kind of objects I must use to add new info on another files. So i tried this one to add a new tag:
String tagToAdd="Tag to add";
int size= tagToAdd.length();
DefaultDataSetInfo valueTag=new DefaultDataSetInfo(537,"Keywords", new StringSerializer(size+ ""),true);
DefaultDataSet dataSet=new DefaultDataSet(valueTag, tagToAdd.getBytes());
iimFile.add(dataSet);
and tried this one to write a new file with a tag:
String tagToAdd="Tag to add";
int size= tagToAdd.length();
DefaultDataSetInfo valueTag=new DefaultDataSetInfo(537,"Keywords", new StringSerializer(size+ ""),true);
DefaultDataSet dataSet=new DefaultDataSet(valueTag, tagToAdd.getBytes());
IIMWriter escritor= new IIMWriter(new DefaultIIMOutputStream(file));
escritor.write(dataSet);
escritor.close();
Tags weren't add. I need some help with this library and its use. Thanks
From my own testing, it seems that IIMWriter is only intended to be used to write the IPTC metadata to a file, and nothing else. Needless to say, that does not make for a valid JPEG file. What you want is to take an existing JPEG file, and generate a new file with the same data, except for the IPTC metadata that should be removed (if any) and replaced with the content of your IIMFile.
That's exactly what JPEGUtil.insertIIMIntoJPEG is for. What you need to do is something like this (where newFile is a File insatnce pointing to where you want to save the modified JPEG):
// 1. Read original IIM
IIMReader reader = new IIMReader(new JPEGIIMInputStream(new FileIIMInputStream(file)), new IIMDataSetInfoFactory());
iimFile.readFrom(reader, 20);
// 2. Add dataset
DataSet dataSet = ... // Whatever you want
iimFile.add(dataSet);
// 3. Create new copy of JPEG file new IIM
try (
InpuStream in = new BufferedInputStream(new FileInputStream(file));
OutputStream out = new BufferedOutputStream(new FileOutputStream(newFile))
) {
JPEGUtil.insertIIMIntoJPEG(out, iimFile, in)
}
I have a problem that needs solving where we use OpenOffice 1.1.4 templated reports and programmatically export them to PDF.
The team who create the templates have recently changed the header image and some images in a table to background images (before they were just inserted) since this change the current program is not creating the PDFs with the images. We can export from OpenOffice manually and the images are included. Can anyone help with a change I may need to make to get these background images included please?
The current code:
private void print(XInterface xComponent,
PrintRequestDTO printReq, File sourceFile,
Vector<String> pages) throws java.lang.Exception {
String pageRange;
// XXX create the PDF via OOo export facility
com.sun.star.frame.XStorable pdfCreator = (com.sun.star.frame.XStorable) UnoRuntime
.queryInterface(
com.sun.star.frame.XStorable.class,
xComponent);
PropertyValue[] outputOpts = new PropertyValue[2];
outputOpts[0] = new PropertyValue();
outputOpts[0].Name = "CompressionMode";
outputOpts[0].Value = "1"; // XXX Change this perhaps?
outputOpts[1] = new PropertyValue();
outputOpts[1].Name = "PageRange";
if (printReq.getPageRange() == null) {
pageRange = "1-";
}
else {
if (printReq.getPageRange().length() > 0) {
pageRange = printReq.getPageRange();
}
else {
pageRange = "1-";
}
}
log.debug("Print Instruction - page range = "
+ pageRange);
PropertyValue[] filterOpts = new PropertyValue[3];
filterOpts[0] = new PropertyValue();
filterOpts[0].Name = "FilterName";
filterOpts[0].Value = "writer_pdf_Export"; // MS Word 97
filterOpts[1] = new PropertyValue();
filterOpts[1].Name = "Overwrite";
filterOpts[1].Value = new Boolean(true);
filterOpts[2] = new PropertyValue();
filterOpts[2].Name = "FilterData";
filterOpts[2].Value = outputOpts;
if (pages.size() == 0) { // ie no forced page breaks
// set page range
outputOpts[1].Value = pageRange;
filterOpts[2] = new PropertyValue();
filterOpts[2].Name = "FilterData";
filterOpts[2].Value = outputOpts;
File outputFile = new File(
sourceFile.getParent(),
printReq.getOutputFileName()
+ ".pdf");
StringBuffer sPDFUrl = new StringBuffer(
"file:///");
sPDFUrl.append(outputFile.getCanonicalPath()
.replace('\\', '/'));
log.debug("PDF file = " + sPDFUrl.toString());
if (pdfCreator != null) {
sleep();
pdfCreator.storeToURL(sPDFUrl.toString(),
filterOpts);
}
}
else if (pages.size() > 1) {
throw new PrintDocumentException(
"Only one forced split catered for currently");
}
else { // a forced split exists.
log.debug("Page break found in "
+ (String) pages.firstElement());
String[] newPageRanges = calculatePageRanges(
(String) pages.firstElement(), pageRange);
int rangeCount = newPageRanges.length;
for (int i = 0; i < rangeCount; i++) {
outputOpts[1].Value = newPageRanges[i];
log.debug("page range = " + newPageRanges[i]);
filterOpts[2] = new PropertyValue();
filterOpts[2].Name = "FilterData";
filterOpts[2].Value = outputOpts;
String fileExtension = (i == 0 && rangeCount > 1) ? "__Summary.pdf"
: ".pdf";
File outputFile = new File(
sourceFile.getParent(),
printReq.getOutputFileName()
+ fileExtension);
StringBuffer sPDFUrl = new StringBuffer(
"file:///");
sPDFUrl.append(outputFile.getCanonicalPath()
.replace('\\', '/'));
log.debug("PDF file = " + sPDFUrl.toString());
if (pdfCreator != null) {
log.debug("about to create the PDF file");
sleep();
pdfCreator.storeToURL(
sPDFUrl.toString(), filterOpts);
log.debug("done");
}
}
}
}
Thanks in advance.
Glad that suggestion of making the document visible helped. Since it has ALSO fixed the problem you have a timing/threading issue. I suspect you'll find that another dodgy option of doing a sleep before executing the save to PDF will also allow the images to appear. Neither of these solutions is good.
Most likley best fix is to upgrade to a newer version of Open Office (the API calls you have should still work). Another option would be to try to call the API to ask the document to refresh itself.
After finding the correct property I was able to open the file with the hidden property set to false, this meant when the file was exported to PDF it included the background images. Its a shame I could not find another solultion that kept the file hidden but at least its working.
I fail to understand why my code is giving me HDF5 Library Exceptions. It points at the createScalarDS method as the source of the error. But I believe this method does exist. Can anyone tell me why this code is unable to create an opaque dataset? What should the modification(s) be? Thanks.
public static void createFile(Message message) throws Exception {
// retrieve an instance of H5File
FileFormat fileFormat = FileFormat
.getFileFormat(FileFormat.FILE_TYPE_HDF5);
if (fileFormat == null) {
System.err.println("Cannot find HDF5 FileFormat.");
return;
}
// create a new file with a given file name.
H5File testFile = (H5File) fileFormat.create(fname);
if (testFile == null) {
System.err.println("Failed to create file:" + fname);
return;
}
// open the file and retrieve the root group
testFile.open();
Group root = (Group) ((javax.swing.tree.DefaultMutableTreeNode) testFile
.getRootNode()).getUserObject();
Group g1 = testFile.createGroup("byte arrays", root);
// obtaining the serialized object
byte[] b = serializer.serialize(message);
int len = b.length;
byte[] dset_data = new byte[len + 1];
// Initialize data.
int indx = 0;
for (int jndx = 0; jndx < len; jndx++)
dset_data[jndx] = b[jndx];
dset_data[len] = (byte) (indx);
// create opaque dataset ---- error here…
Datatype dtype = testFile.createDatatype(Datatype.CLASS_OPAQUE,
(len * 4), Datatype.NATIVE, Datatype.NATIVE);
Dataset dataset = testFile.createScalarDS("byte array", g1, dtype,
dims1D, null, null, 0, dset_data);// error shown in this line
// close file resource
testFile.close();
}
I don't have grip on HDF5.
but, you can not directly use CLASS_OPAQUE
An opaque data type is a user-defined data type that can be used in the same way as a built-in data type. To create an opaque type check links:
http://idlastro.gsfc.nasa.gov/idl_html_help/Opaque_Datatypes.html
To create array datatype object:
Result = H5T_ARRAY_CREATE(Datatype_id, Dimensions)
example:
http://idlastro.gsfc.nasa.gov/idl_html_help/H5F_CREATE.html