Example usage for org.apache.pdfbox.cos COSStream removeItem

Introduction

In this page you can find the example usage for org.apache.pdfbox.cos COSStream removeItem.

Prototype

public void removeItem(COSName key) 

Source Link

Document

This will remove an item for the dictionary.

Usage

From source file:ReducePDFSize.java

License:Apache License

public static void main(String[] args) throws IOException {
    if (2 != args.length) {
        throw new RuntimeException("arg0 must be input file, org1 must be output file");
    }/* w  ww. j  ava 2  s  .c o  m*/
    String in = args[0];
    String out = args[1];
    PDDocument doc = null;

    try {
        doc = PDDocument.load(new File(in));
        doc.setAllSecurityToBeRemoved(true);
        for (COSObject cosObject : doc.getDocument().getObjects()) {
            COSBase base = cosObject.getObject();
            // if it's a stream: decode it, then re-write it using FLATE_DECODE
            if (base instanceof COSStream) {
                COSStream stream = (COSStream) base;
                byte[] bytes;
                try {
                    bytes = new PDStream(stream).toByteArray();
                } catch (IOException ex) {
                    // NOTE: original example code from PDFBox just logged & "continue;"d here, 'skipping' this stream.
                    // If this type of failure ever happens, we can (perhaps) consider (re)ignoring this type of failure?
                    //
                    // IIUC then that will leave the original (non-decoded / non-flated) stream in place?
                    throw new RuntimeException("can't serialize byte[] from: " + cosObject.getObjectNumber()
                            + " " + cosObject.getGenerationNumber() + " obj: " + ex.getMessage(), ex);
                }
                stream.removeItem(COSName.FILTER);
                OutputStream streamOut = stream.createOutputStream(COSName.FLATE_DECODE);
                streamOut.write(bytes);
                streamOut.close();
            }
        }
        doc.getDocumentCatalog();
        doc.save(out);
    } finally {
        if (doc != null) {
            doc.close();
        }
    }
}

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From source file:org.apache.fop.render.pdf.pdfbox.PDFBoxAdapter.java

License:Apache License

private void mergeXObj(COSDictionary sourcePageResources, FontInfo fontinfo, UniqueName uniqueName)
        throws IOException {
    COSDictionary xobj = (COSDictionary) sourcePageResources.getDictionaryObject(COSName.XOBJECT);
    if (xobj != null && pdfDoc.isMergeFontsEnabled()) {
        for (Map.Entry<COSName, COSBase> i : xobj.entrySet()) {
            COSObject v = (COSObject) i.getValue();
            COSStream stream = (COSStream) v.getObject();
            COSDictionary res = (COSDictionary) stream.getDictionaryObject(COSName.RESOURCES);
            if (res != null) {
                COSDictionary src = (COSDictionary) res.getDictionaryObject(COSName.FONT);
                if (src != null) {
                    COSDictionary target = (COSDictionary) sourcePageResources
                            .getDictionaryObject(COSName.FONT);
                    if (target == null) {
                        sourcePageResources.setItem(COSName.FONT, src);
                    } else {
                        for (Map.Entry<COSName, COSBase> entry : src.entrySet()) {
                            if (!target.keySet().contains(entry.getKey())) {
                                target.setItem(uniqueName.getName(entry.getKey()), entry.getValue());
                            }/*from w w w . j  av a 2 s  . c  om*/
                        }
                    }
                    PDFWriter writer = new MergeFontsPDFWriter(src, fontinfo, uniqueName, parentFonts, 0);
                    String c = writer.writeText(new PDStream(stream));
                    if (c != null) {
                        stream.removeItem(COSName.FILTER);
                        newXObj.put(i.getKey(), c);
                        for (Object e : src.keySet().toArray()) {
                            COSName name = (COSName) e;
                            src.setItem(uniqueName.getName(name), src.getItem(name));
                            src.removeItem(name);
                        }
                    }
                }
            }
        }
    }
}

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