Examples of org.xml.sax.ContentHandler

org.xml.sax.ContentHandler
axproject.org'>http://www.saxproject.org for further information.
This is the main interface that most SAX applications implement: if the application needs to be informed of basic parsing events, it implements this interface and registers an instance with the SAX parser using the {@link org.xml.sax.XMLReader#setContentHandler setContentHandler} method. The parser uses the instance to report basic document-related events like the start and end of elements and character data.

The order of events in this interface is very important, and mirrors the order of information in the document itself. For example, all of an element's content (character data, processing instructions, and/or subelements) will appear, in order, between the startElement event and the corresponding endElement event.

This interface is similar to the now-deprecated SAX 1.0 DocumentHandler interface, but it adds support for Namespaces and for reporting skipped entities (in non-validating XML processors).

Implementors should note that there is also a ContentHandler class in the java.net package; that means that it's probably a bad idea to do
```
import java.net.*; import org.xml.sax.*; 
```
In fact, "import ...*" is usually a sign of sloppy programming anyway, so the user should consider this a feature rather than a bug.
@since SAX 2.0 @author David Megginson @version 2.0.1+ (sax2r3pre1) @see org.xml.sax.XMLReader @see org.xml.sax.DTDHandler @see org.xml.sax.ErrorHandler

      // deserialize into another CAS (repeat twice to check it still works after reset)
      CAS newCas = CasCreationUtils.createCas(typeSystem, new TypePriorities_impl(),
              new FsIndexDescription[0]);
      for (int i = 0; i < 2; i++) {
        XmiCasDeserializer newDeser = new XmiCasDeserializer(newCas.getTypeSystem());
        ContentHandler newDeserHandler = newDeser.getXmiCasHandler(newCas);
        SAXParserFactory fact = SAXParserFactory.newInstance();
        SAXParser parser = fact.newSAXParser();
        XMLReader xmlReader = parser.getXMLReader();
        xmlReader.setContentHandler(newDeserHandler);
        xmlReader.parse(new InputSource(new StringReader(xml)));

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      // deserialize a complex CAS from XCAS
      CAS cas = CasCreationUtils.createCas(typeSystem, new TypePriorities_impl(), indexes);


      InputStream serCasStream = new FileInputStream(JUnitExtension.getFile("ExampleCas/cas.xml"));
      XCASDeserializer deser = new XCASDeserializer(cas.getTypeSystem());
      ContentHandler deserHandler = deser.getXCASHandler(cas);
      SAXParserFactory fact = SAXParserFactory.newInstance();
      SAXParser parser = fact.newSAXParser();
      XMLReader xmlReader = parser.getXMLReader();
      xmlReader.setContentHandler(deserHandler);
      xmlReader.parse(new InputSource(serCasStream));
      serCasStream.close();


      // now read in a TypeSystem that's a subset of those types
      TypeSystemDescription partialTypeSystemDesc = UIMAFramework.getXMLParser()
              .parseTypeSystemDescription(
                      new XMLInputSource(JUnitExtension
                              .getFile("ExampleCas/partialTestTypeSystem.xml")));
      TypeSystem partialTypeSystem = CasCreationUtils.createCas(partialTypeSystemDesc, null, null)
              .getTypeSystem();


      // reserialize as XMI, filtering out anything that doesn't fit in the
      // partialTypeSystem
      StringWriter sw = new StringWriter();
      XMLSerializer xmlSer = new XMLSerializer(sw, false);
      XmiCasSerializer xmiSer = new XmiCasSerializer(partialTypeSystem);
      xmiSer.serialize(cas, xmlSer.getContentHandler());
      String xml = sw.getBuffer().toString();
      // System.out.println(xml);


      // deserialize into another CAS (which has the whole type system)
      CAS cas2 = CasCreationUtils.createCas(typeSystem, new TypePriorities_impl(), indexes);
      XmiCasDeserializer deser2 = new XmiCasDeserializer(cas2.getTypeSystem());
      ContentHandler deserHandler2 = deser2.getXmiCasHandler(cas2);
      xmlReader.setContentHandler(deserHandler2);
      xmlReader.parse(new InputSource(new StringReader(xml)));


      // check that types have been filtered out
      Type orgType = cas2.getTypeSystem().getType("org.apache.uima.testTypeSystem.Organization");

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    // deserialize into another CAS
    CAS cas2 = CasCreationUtils.createCas(typeSystem, new TypePriorities_impl(),
            new FsIndexDescription[0]);


    XmiCasDeserializer deser2 = new XmiCasDeserializer(cas2.getTypeSystem());
    ContentHandler deserHandler2 = deser2.getXmiCasHandler(cas2);
    SAXParserFactory fact = SAXParserFactory.newInstance();
    SAXParser parser = fact.newSAXParser();
    XMLReader xmlReader = parser.getXMLReader();
    xmlReader.setContentHandler(deserHandler2);
    xmlReader.parse(new InputSource(new StringReader(xml)));

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            new FsIndexDescription[0]);


    // get a complex CAS
    InputStream serCasStream = new FileInputStream(JUnitExtension.getFile("ExampleCas/cas.xml"));
    XCASDeserializer deser = new XCASDeserializer(cas.getTypeSystem());
    ContentHandler deserHandler = deser.getXCASHandler(cas);
    SAXParserFactory fact = SAXParserFactory.newInstance();
    SAXParser parser = fact.newSAXParser();
    XMLReader xmlReader = parser.getXMLReader();
    xmlReader.setContentHandler(deserHandler);
    xmlReader.parse(new InputSource(serCasStream));
    serCasStream.close();


    // test it
    assertTrue(CAS.NAME_DEFAULT_SOFA.equals(cas.getSofa().getSofaID()));


    // get a v1 XMI version of the same CAS
    serCasStream = new FileInputStream(JUnitExtension.getFile("ExampleCas/v1xmiCas.xml"));
    XmiCasDeserializer deser2 = new XmiCasDeserializer(v1cas.getTypeSystem());
    ContentHandler deserHandler2 = deser2.getXmiCasHandler(v1cas);
    xmlReader.setContentHandler(deserHandler2);
    xmlReader.parse(new InputSource(serCasStream));
    serCasStream.close();


    // compare

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      String media = null;
      Vector params = new Vector();
      boolean quietConflictWarnings = false;
      URIResolver uriResolver = null;
      EntityResolver entityResolver = null;
      ContentHandler contentHandler = null;
      int recursionLimit=-1;


      for (int i = 0; i < argv.length; i++)
      {
        if ("-XSLTC".equalsIgnoreCase(argv[i]))

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    public void testBasicScript() throws Exception
    {
        MockControl control = newControl(ContentHandler.class);
        control.setDefaultMatcher(new SAXEqualsMatcher());


        ContentHandler mock = (ContentHandler) control.getMock();


        mock.setDocumentLocator(HiveMindBuilder.GROOVY_LOCATOR);


        AttributesImpl attrs = new AttributesImpl();


        attrs.addAttribute("", "id", "id", "", "basic");
        attrs.addAttribute("", "version", "version", "", "1.0.0");


        mock.startElement("", "module", "module", attrs);
        mock.endElement("", "module", "module");


        replayControls();


        Script script = new GroovyShell().parse("processor.module(id:'basic', version:'1.0.0')");

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   * @param aWriter
   *          a Writer to which the XML string will be written
   */
  public void toXML(Writer aWriter) throws SAXException, IOException {
    XMLSerializer sax2xml = new XMLSerializer(aWriter);
    ContentHandler contentHandler = sax2xml.getContentHandler();
    contentHandler.startDocument();
    toXML(sax2xml.getContentHandler(), true);
    contentHandler.endDocument();
  }

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   * @param aOutputStream
   *          an OutputStream to which the XML string will be written
   */
  public void toXML(OutputStream aOutputStream) throws SAXException, IOException {
    XMLSerializer sax2xml = new XMLSerializer(aOutputStream);
    ContentHandler contentHandler = sax2xml.getContentHandler();
    contentHandler.startDocument();
    toXML(sax2xml.getContentHandler(), true);
    contentHandler.endDocument();
  }

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  public static void deserialize(InputStream aStream, CAS aCAS, boolean aLenient,
          XmiSerializationSharedData aSharedData, int aMergePoint)
          throws SAXException, IOException {
    XMLReader xmlReader = XMLReaderFactory.createXMLReader();
    XmiCasDeserializer deser = new XmiCasDeserializer(aCAS.getTypeSystem());
    ContentHandler handler = deser.getXmiCasHandler(aCAS, aLenient, aSharedData, aMergePoint);
    xmlReader.setContentHandler(handler);
    xmlReader.parse(new InputSource(aStream));
  }

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        if ( node != null ) {
            try {
                if ( req.getRequestPathInfo().getSelectorString() == null
                     || req.getRequestPathInfo().getSelectorString().equals(DOCVIEW) ) {
                    // check if response is adaptable to a content handler
                    final ContentHandler ch = resp.adaptTo(ContentHandler.class);
                    if ( ch == null ) {
                        node.getSession().exportDocumentView(node.getPath(), resp.getOutputStream(), false, false);
                    } else {
                        node.getSession().exportDocumentView(node.getPath(), ch, false, false);
                    }
                } else if ( req.getRequestPathInfo().getSelectorString().equals(SYSVIEW) ) {
                    // check if response is adaptable to a content handler
                    final ContentHandler ch = resp.adaptTo(ContentHandler.class);
                    if ( ch == null ) {
                        node.getSession().exportSystemView(node.getPath(), resp.getOutputStream(), false, false);
                    } else {
                        node.getSession().exportSystemView(node.getPath(), ch, false, false);
                    }

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