Examples of org.apache.pdfbox.cos.COSStream

org.apache.pdfbox.cos.COSStream
This class represents a stream object in a PDF document. @author Ben Litchfield

     * @param document The document that the stream will be part of.
     * @return A new stream object.
     */
    public static PDObjectStream createStream( PDDocument document )
    {
        COSStream cosStream = document.getDocument().createCOSStream();
        PDObjectStream strm = new PDObjectStream( cosStream );
        strm.getStream().setItem( COSName.TYPE, COSName.OBJ_STM );
        return strm;
    }

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     * @return The object that this stream is an extension.
     */
    public PDObjectStream getExtends()
    {
        PDObjectStream retval = null;
        COSStream stream = (COSStream)getStream().getDictionaryObject( COSName.EXTENDS );
        if( stream != null )
        {
            retval = new PDObjectStream( stream );
        }
        return retval;

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     * Returns the metadata associated with this XObject, or null if there is none.
     * @return the metadata associated with this object.
     */
    public PDMetadata getMetadata()
    {
        COSStream cosStream = (COSStream) getCOSStream().getDictionaryObject(COSName.METADATA);
        if (cosStream != null)
        {
            return new PDMetadata(cosStream);
        }
        return null;

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            // color key mask, no explicit mask to return
            return null;
        }
        else
        {
            COSStream cosStream = (COSStream)getCOSStream().getDictionaryObject(COSName.MASK);
            if (cosStream != null)
            {
                return new PDImageXObject(new PDStream(cosStream), null); // always DeviceGray
            }
            return null;

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     * Returns the Soft Mask Image XObject associated with this image, or null if there is none.
     * @return the SMask Image XObject, or null.
     */
    public PDImageXObject getSoftMask() throws IOException
    {
        COSStream cosStream = (COSStream)getCOSStream().getDictionaryObject(COSName.SMASK);
        if (cosStream != null)
        {
            return new PDImageXObject(new PDStream(cosStream), null);  // always DeviceGray
        }
        return null;

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        dict.setItem("Domain", domainArray);
        COSArray rangeArray = new COSArray();
        rangeArray.setFloatArray(range);
        dict.setItem("Range", rangeArray);


        COSStream functionStream = new COSStream(dict);
        OutputStream out = functionStream.createUnfilteredStream();
        byte[] data = function.getBytes("US-ASCII");
        out.write(data, 0, data.length);
        out.flush();


        return new PDFunctionType4(functionStream);

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        // pass a non-stroking color in CMYK color space
        contentStream.setNonStrokingColor(0.1f, 0.2f, 0.3f, 0.4f);
        contentStream.close();


        // now read the PDF stream and verify that the CMYK values are correct
        COSStream stream = page.getStream().getStream();
        PDFStreamParser parser = new PDFStreamParser(stream);
        parser.parse();
        java.util.List<Object>  pageTokens = parser.getTokens();
        // expected five tokens :
        // [0] = COSFloat{0.1}

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    {
        int[] cid2gid = null;
        COSBase map = dict.getDictionaryObject(COSName.CID_TO_GID_MAP);
        if (map instanceof COSStream)
        {
            COSStream stream = (COSStream) map;
            try
            {
                InputStream is = stream.getUnfilteredStream();
                byte[] mapAsBytes = IOUtils.toByteArray(is);
                IOUtils.closeQuietly(is);
                int numberOfInts = mapAsBytes.length / 2;
                cid2gid = new int[numberOfInts];
                int offset = 0;

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    private COSStream createContentStream(COSBase contents) throws IOException
    {
        List<COSStream> contentStreams = createContentStreamList(contents);
        // concatenate streams
        COSStream concatStream = new COSStream();
        OutputStream out = concatStream.createUnfilteredStream();
        for (COSStream contentStream : contentStreams)
        {
            InputStream in = contentStream.getUnfilteredStream();
            byte[] buf = new byte[2048];
            int n;
            while ((n = in.read(buf)) > 0)
            {
                out.write(buf, 0, n);
            }
            out.flush();
        }
        out.close();
        concatStream.setFilters(COSName.FLATE_DECODE);
        return concatStream;
    }

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                + " cm /" + xObjectId.getName() + " Do Q\nQ\n");
    }


    private COSStream createStream(String content) throws IOException
    {
        COSStream stream = new COSStream();
        OutputStream out = stream.createUnfilteredStream();
        out.write(content.getBytes("ISO-8859-1"));
        out.close();
        stream.setFilters(COSName.FLATE_DECODE);
        return stream;
    }

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