Getting error "org.pdfclown.util.NotImplementedException: LZWDecode" when highlighting words inside pdfs

[Rohini Gate]

Hi,

We are using below code to highlight word in pdf,

public String highlight(String inputPath, String outputPath, String searchWord1,javax.servlet.http.HttpServletResponse res )
{
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
final String searchWord= searchWord1;

        // 1. Open the PDF file!
        File file;
        try
        {

            file = new File(inputPath);
        }
        catch(Exception e)
        {
            throw new RuntimeException(inputPath + " file access error.",e);
        }
         count = 0;
        Pattern pattern = Pattern.compile(searchWord, Pattern.CASE_INSENSITIVE);

        // 2. Iterating through the document pages...
        TextExtractor textExtractor = new TextExtractor(true, true);

        for(final Page page : file.getDocument().getPages())
        {

            // 2.1. Extract the page text!
            Map<Rectangle2D,List<ITextString>> textStrings = textExtractor.extract(page);

            // 2.2. Find the text pattern matches!
            final Matcher matcher = pattern.matcher(TextExtractor.toString(textStrings));
            // 2.3. Highlight the text pattern matches!

            textExtractor.filter(textStrings,
                    new TextExtractor.IIntervalFilter()
            {
                public boolean hasNext()
                {                   
                    if (matcher.find()) {
                        count++;
                        return true;
                    }
                    return false;
                }

                public Interval<Integer> next()
                {
                    return new Interval<Integer>(matcher.start(), matcher.end());
                }

                public void process(Interval<Integer> interval, ITextString match)
                {
                    // Defining the highlight box of the text pattern match...
                    List<Quad> highlightQuads = new ArrayList<Quad>();
                    {
                        Rectangle2D textBox = null;
                        for(TextChar textChar : match.getTextChars())
                        {
                            Rectangle2D textCharBox = textChar.getBox();
                            if(textBox == null)
                            {textBox = (Rectangle2D)textCharBox.clone();}
                            else
                            {
                                if(textCharBox.getY() > textBox.getMaxY())
                                {
                                    highlightQuads.add(Quad.get(textBox));
                                    textBox = (Rectangle2D)textCharBox.clone();
                                }
                                else
                                {textBox.add(textCharBox);}
                            }
                        }
                        textBox.setRect(textBox.getX(), textBox.getY(), textBox.getWidth(), textBox.getHeight()+5);
                        highlightQuads.add(Quad.get(textBox));
                    }

                    TextMarkup temp = new TextMarkup(page, searchWord, MarkupTypeEnum.Highlight, highlightQuads);
                    temp.setColor(new DeviceRGBColor((35.0/255.0), (35.0/255.0), (142.0/255.0))); 
                    //TextMarkup temp = new TextMarkup(
                    temp.setVisible(true);
                //  temp.setColor(new DeviceRGBColor((35.0/255.0), (35.0/255.0), (142.0/255.0))); 
                    //temp.setColor("white");
                }

                public void remove()
                {throw new UnsupportedOperationException();}
            }
                    );
        }

        SerializationModeEnum serializationMode = SerializationModeEnum.Incremental;
         ServletOutputStream out =null;
        try
        {

            file.save(new java.io.File(outputPath), serializationMode);
            //ByteArrayOutputStream baos = new ByteArrayOutputStream();

            file.close();

        }

       However we are getting below error for some pdfs

org.pdfclown.util.NotImplementedException: LZWDecode
org.pdfclown.bytes.filters.Filter.get(Filter.java:74)
org.pdfclown.objects.PdfStream.getBody(PdfStream.java:193)
org.pdfclown.objects.PdfStream.getBody(PdfStream.java:155)
org.pdfclown.documents.contents.Contents$ContentStream.moveNextStream(Contents.java:279)
org.pdfclown.documents.contents.Contents$ContentStream.<init>(Contents.java:86)
org.pdfclown.documents.contents.Contents.load(Contents.java:591)
org.pdfclown.documents.contents.Contents.<init>(Contents.java:366)
org.pdfclown.documents.contents.Contents.wrap(Contents.java:345)
org.pdfclown.documents.Page.getContents(Page.java:571)
org.pdfclown.documents.contents.ContentScanner.<init>(ContentScanner.java:1033)
org.pdfclown.tools.TextExtractor.extract(TextExtractor.java:297)
com.att.bcpr.actions.MyPdfHighlighting.highlight(MyPdfHighlighting.java:92)
com.att.bcpr.actions.MyPdfHighlighting.doGet(MyPdfHighlighting.java:59)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:86)

When we traced the log then came to know that error is with below line,

Map<Rectangle2D,List<ITextString>> textStrings = textExtractor.extract(page);

Please help me in this.

Thanks

[Rohini Gate]

Please guide me on this