Examples of org.xml.sax.XMLFilter

org.xml.sax.XMLFilter
axproject.org'>http://www.saxproject.org for further information.
An XML filter is like an XML reader, except that it obtains its events from another XML reader rather than a primary source like an XML document or database. Filters can modify a stream of events as they pass on to the final application.

The XMLFilterImpl helper class provides a convenient base for creating SAX2 filters, by passing on all {@link org.xml.sax.EntityResolver EntityResolver}, {@link org.xml.sax.DTDHandler DTDHandler}, {@link org.xml.sax.ContentHandler ContentHandler} and {@link org.xml.sax.ErrorHandler ErrorHandler} events automatically.
@since SAX 2.0 @author David Megginson @version 2.0.1 (sax2r2) @see org.xml.sax.helpers.XMLFilterImpl


            Templates t = createTemplates(getInTemplates(mt), inParamsMap, inProperties);
            if (t == null && supportJaxbOnly) {
                return super.unmarshalFromInputStream(unmarshaller, is, mt);
            }
            XMLFilter filter = factory.newXMLFilter(t);
            SAXSource source = new SAXSource(filter, new InputSource(is));
            if (systemId != null) {
                source.setSystemId(systemId);
            }
            return unmarshaller.unmarshal(source);

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            // If the Source object is not changed, the
            // getTransformerHandler() of XSLTProcessor will simply return
            // the old template object. If the Source is unchanged, the
            // namespaces are not modified either.
            XMLFilter saveNSFilter = new SaveNamespaceFilter(namespaceURIs);
            return xsltProcessor.getTransformerHandler(source, saveNSFilter);


        } catch (ServiceException e) {
            throw new ProcessingException("Could not obtain XSLT processor", e);
        } catch (MalformedURLException e) {

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        if (filterChain == null) {
            this.xmlReader = new SaxWriter();
        } else {
            if (filterChain instanceof XMLFilter) {
                // Connect the filter chain to a document reader.
                XMLFilter filter = (XMLFilter) filterChain;
                while (filter.getParent() instanceof XMLFilter) {
                    filter = (XMLFilter) (filter.getParent());
                }
                filter.setParent(new SaxWriter());


                // Read XML data from filter chain.
                this.xmlReader = filterChain;
            } else {
                throw new UnsupportedOperationException();

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    private void writeSVGToOutput(SVGGraphics2D svgGenerator,
                                  Element svgRoot,
                                  TranscoderOutput output) 
        throws TranscoderException {
        // XMLFilter
        XMLFilter xmlFilter = output.getXMLFilter();
        if(xmlFilter != null){
            handler.fatalError(new TranscoderException("" + ERROR_INCOMPATIBLE_OUTPUT_TYPE));
        }


        // <!> FIX ME: SHOULD HANDLE DOCUMENT INPUT

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        LinkedList filterList = new LinkedList();
        if (templatesData == null)
            return filterList;
        for (int i = 0; i < templatesData.length; i++) {
            TemplatesData t = templatesData[i];
            XMLFilter f = _stf.newXMLFilter(t.getTemplates());
            addToList(filterList, i, f);
        }
        return filterList;
    }

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        }
        return filterList;
    }
    
    private void addToList(LinkedList filterList, int index, XMLFilter filter) {
        XMLFilter parent = null;
        if ( index == 0) {
            filter.setParent(_reader);
        } else {
            parent = (XMLFilter) filterList.get(index-1);
            filter.setParent(parent);
            // check if child the exists
            if ( filterList.size() -1 > index) {
                XMLFilter child = (XMLFilter) filterList.get(index);
                if ( child != null) {
                    child.setParent(filter);
                }
            }
        }
        filterList.add(index, filter);        
    }

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        // In general, a filter may violate the constraints of XML 1.0.
        // However, I specifically trust Norm Walsh not to do that, so 
        // if his filters are being used we look at the parent instead.
        if (parserName.equals("org.apache.xml.resolver.tools.ResolvingXMLFilter")) {
            XMLFilter filter = (XMLFilter) parser;
            parserName = filter.getParent().getClass().getName();
        }
        
        // These parsers are known to not make all the checks
        // they're supposed to. :-(
        if (parserName.equals("gnu.xml.aelfred2.XmlReader")) return false;

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        String data = "<?xml version=\"1.0\"?>\n" 
          + "<!DOCTYPE root [\n" +
                "  <!--comment-->\n  <!ELEMENT test (#PCDATA)>" +
            "\n  <!--comment-->\n]>"
          + "\n<test />\n";  
        XMLFilter filter = new XMLFilterImpl();
        filter.setParent(XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser"));
        Document doc = (new Builder(filter)).build(data, null);
        String result = doc.toXML();
        assertEquals(data, result);    
        
    }

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        String data = "<?xml version=\"1.0\"?>\n" 
          + "<!DOCTYPE root [\n" +
                "  <?target data?>\n  <!ELEMENT test (#PCDATA)>" +
            "\n  <?target?>\n]>"
          + "\n<test />\n";  
        XMLFilter filter = new XMLFilterImpl();
        filter.setParent(XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser"));
        Document doc = (new Builder(filter)).build(data, null);
        String result = doc.toXML();
        assertEquals(data, result);    
        
    }

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                && tFactory.getFeature(SAXResult.FEATURE)) {
                // Cast the TransformerFactory to SAXTransformerFactory.
                SAXTransformerFactory saxTFactory =
                    ((SAXTransformerFactory)tFactory);
                // Create an XMLFilter for each stylesheet.
                XMLFilter xmlfilter =
                    saxTFactory.newXMLFilter(xsltSource);


                // Create an XMLReader.
                XMLReader parser = createParser();
                if (parser == null) {
                    throw new FOPException("Unable to create SAX parser");
                }


                // xmlFilter uses the XMLReader as its reader.
                xmlfilter.setParent(parser);
                return xmlfilter;
            } else {
                throw new FOPException("Your parser doesn't support the features SAXSource and SAXResult."
                                       + "\nMake sure you are using a xsl parser which supports TrAX");
            }

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