Examples of org.xml.sax.DTDHandler

org.xml.sax.DTDHandler
axproject.org'>http://www.saxproject.org for further information.
If a SAX application needs information about notations and unparsed entities, then the application implements this interface and registers an instance with the SAX parser using the parser's setDTDHandler method. The parser uses the instance to report notation and unparsed entity declarations to the application.

Note that this interface includes only those DTD events that the XML recommendation requires processors to report: notation and unparsed entity declarations.

The SAX parser may report these events in any order, regardless of the order in which the notations and unparsed entities were declared; however, all DTD events must be reported after the document handler's startDocument event, and before the first startElement event. (If the {@link org.xml.sax.ext.LexicalHandler LexicalHandler} isused, these events must also be reported before the endDTD event.)

It is up to the application to store the information for future use (perhaps in a hash table or object tree). If the application encounters attributes of type "NOTATION", "ENTITY", or "ENTITIES", it can use the information that it obtained through this interface to find the entity and/or notation corresponding with the attribute value.
@since SAX 1.0 @author David Megginson @version 2.0.1 (sax2r2) @see org.xml.sax.XMLReader#setDTDHandler

        }
    }


    public void testSetDtdHandlerNotSupported() {
        try {
            new DefaultNonBlockingXMLReader().setDTDHandler(new DTDHandler() {
                public void unparsedEntityDecl(String name, String publicId, String systemId, String notationName)
                        throws SAXException {
                }


                public void notationDecl(String name, String publicId, String systemId) throws SAXException {

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        // unqueue all of the buffered events


        // for speed purposes, we don't allow contentHandler to be null
        if(ch!=null) {
            // determine what a given content handler represents
            DTDHandler dtdh=null;
            if(ch instanceof DTDHandler) {
                dtdh=(DTDHandler) ch;
            }


            ErrorHandler erh=null;

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        // unqueue all of the buffered events


        // for speed purposes, we don't allow contentHandler to be null
        if(ch!=null) {
            // determine what a given content handler represents
            DTDHandler dtdh=null;
            if(ch instanceof DTDHandler) {
                dtdh=(DTDHandler) ch;
            }
            
            ErrorHandler erh=null;
            if(ch instanceof ErrorHandler) {
                erh=(ErrorHandler)ch;
            }
            
            LexicalHandler lh=null;
            if(ch instanceof LexicalHandler) {
                lh=(LexicalHandler)ch;
            }
        
            Enumeration args = eventArguments.elements ();
            ThreeString ths;
            CharBlock cd;
            TwoString ts;
            FourString fs;
            SAXParseException e;
        
            for (Enumeration types = eventTypes.elements (); types.hasMoreElements ();) {
                Integer type = (Integer)types.nextElement();


                // ContentHandler events
                if (STARTDOCUMENT.equals(type)) {
                    ch.startDocument ();
                } else if (ENDDOCUMENT.equals(type)) {
                    ch.endDocument ();
                } else if (STARTPREFIXMAPPING.equals(type)) {
                    ts=(TwoString) args.nextElement();
                    ch.startPrefixMapping(ts.first,ts.second);
                } else if (ENDPREFIXMAPPING.equals(type)) {
                    ch.endPrefixMapping((String)args.nextElement());
                } else if (STARTELEMENT.equals(type)) {
                    StartElementData sed = (StartElementData) args.nextElement ();
                    ch.startElement (sed.getURI(), sed.getLocalName(), sed.getQName(),sed.getAtts());
                } else if (ENDELEMENT.equals(type)) {
                    ths = (ThreeString) args.nextElement ();
                    ch.endElement (ths.first,ths.second,ths.third);
                } else if (CHARACTERS.equals(type)) {
                    cd = (CharBlock) args.nextElement ();
                    ch.characters (cd.getCh(), cd.getStart(), cd.getLength());
                } else if (IGNORABLEWHITESPACE.equals(type)) {
                    cd = (CharBlock) args.nextElement ();
                    ch.ignorableWhitespace (cd.getCh(), cd.getStart(), cd.getLength());
                } else if (PROCESSINGINSTRUCTION.equals(type)) {
                    ts=(TwoString) args.nextElement();
                    ch.processingInstruction (ts.first,ts.second);
                    
                // DTDHandler events
                } else if (NOTATIONDECL.equals(type)) {
                    if(dtdh!=null) {
                        ths=(ThreeString) args.nextElement();
                        dtdh.notationDecl(ths.first,ths.second,ths.third);
                    }
                } else if (UNPARSEDENTITYDECL.equals(type)) {
                    if(dtdh!=null) {
                        fs=(FourString) args.nextElement();
                        dtdh.unparsedEntityDecl(fs.first,fs.second,fs.third,fs.fourth);
                    }


                // ErrorHandler events
                } else if (WARNING.equals(type)) {
                    if(erh!=null) {

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