basemarkupserializer.java

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                  (fDOMFilter.getWhatToShow() & NodeFilter.SHOW_ELEMENT)!= 0) {
                  short code = fDOMFilter.acceptNode(node);
                  switch (code) {
                    case NodeFilter.FILTER_REJECT: {
                        return;                     
                    }
                    case NodeFilter.FILTER_SKIP: { 
                        Node child = node.getFirstChild();
                        while ( child != null ) {
                            serializeNode( child );
                            child = child.getNextSibling();
                        }
                        return;  // skip this node                      
                    }

                    default: { // fall through
                    }
                  }
            }
            serializeElement( (Element) node );
            break;
        }
        case Node.DOCUMENT_NODE : {
            DocumentType      docType;
            DOMImplementation domImpl;
            NamedNodeMap      map;
            Entity            entity;
            Notation          notation;
            int               i;
            
            serializeDocument();
            
            // If there is a document type, use the SAX events to
            // serialize it.
            docType = ( (Document) node ).getDoctype();
            if (docType != null) {
                // DOM Level 2 (or higher)
                domImpl = ( (Document) node ).getImplementation();
                try {
                    String internal;

                    _printer.enterDTD();
                    _docTypePublicId = docType.getPublicId();
                    _docTypeSystemId = docType.getSystemId();
                    internal = docType.getInternalSubset();
                    if ( internal != null && internal.length() > 0 )
                        _printer.printText( internal );
                    endDTD();
                }
                // DOM Level 1 -- does implementation have methods?
                catch (NoSuchMethodError nsme) {
                    Class docTypeClass = docType.getClass();

                    String docTypePublicId = null;
                    String docTypeSystemId = null;
                    try {
                        java.lang.reflect.Method getPublicId = docTypeClass.getMethod("getPublicId", (Class[]) null);
                        if (getPublicId.getReturnType().equals(String.class)) {
                            docTypePublicId = (String)getPublicId.invoke(docType, (Object[]) null);
                        }
                    }
                    catch (Exception e) {
                        // ignore
                    }
                    try {
                        java.lang.reflect.Method getSystemId = docTypeClass.getMethod("getSystemId", (Class[]) null);
                        if (getSystemId.getReturnType().equals(String.class)) {
                            docTypeSystemId = (String)getSystemId.invoke(docType, (Object[]) null);
                        }
                    }
                    catch (Exception e) {
                        // ignore
                    }
                    _printer.enterDTD();
                    _docTypePublicId = docTypePublicId;
                    _docTypeSystemId = docTypeSystemId;
                    endDTD();
                }
                
                serializeDTD(docType.getName());
                              
            }
            _started = true;
                     
            // !! Fall through
        }
        case Node.DOCUMENT_FRAGMENT_NODE : {
            Node         child;

            // By definition this will happen if the node is a document,
            // document fragment, etc. Just serialize its contents. It will
            // work well for other nodes that we do not know how to serialize.
            child = node.getFirstChild();
            while ( child != null ) {
                serializeNode( child );
                child = child.getNextSibling();
            }
            break;
        }

        default:
            break;
        }
    }

 
    /* Serializes XML Declaration, according to 'xml-declaration' property.
     */
    protected void serializeDocument()throws IOException {
        int    i;
                
        String dtd = _printer.leaveDTD();
        if (! _started) {

            if (! _format.getOmitXMLDeclaration()) {
                StringBuffer    buffer;

                // Serialize the document declaration appreaing at the head
                // of very XML document (unless asked not to).
                buffer = new StringBuffer( "<?xml version=\"" );
                if (_format.getVersion() != null)
                    buffer.append( _format.getVersion() );
                else
                    buffer.append( "1.0" );
                buffer.append( '"' );
                String format_encoding =  _format.getEncoding();
                if (format_encoding != null) {
                    buffer.append( " encoding=\"" );
                    buffer.append( format_encoding );
                    buffer.append( '"' );
                }
                if (_format.getStandalone() && _docTypeSystemId == null &&
                    _docTypePublicId == null)
                    buffer.append( " standalone=\"yes\"" );
                buffer.append( "?>" );
                _printer.printText( buffer );
                _printer.breakLine();
            }
        }
        
        // Always serialize these, even if not te first root element.
        serializePreRoot();
        
    }
       
    /* Serializes DTD, if present.
     */
    protected void serializeDTD(String name) throws IOException{
        
        String dtd = _printer.leaveDTD();
        if (! _format.getOmitDocumentType()) {
            if (_docTypeSystemId != null) {
                // System identifier must be specified to print DOCTYPE.
                // If public identifier is specified print 'PUBLIC
                // <public> <system>', if not, print 'SYSTEM <system>'.
                _printer.printText( "<!DOCTYPE " );
                _printer.printText( name );
                if (_docTypePublicId != null) {
                    _printer.printText( " PUBLIC " );
                    printDoctypeURL( _docTypePublicId );
                    if (_indenting) {
                        _printer.breakLine();
                        for (int i = 0 ; i < 18 + name.length() ; ++i)
                            _printer.printText( " " );
                    } else
                        _printer.printText( " " );
                    printDoctypeURL( _docTypeSystemId );
                } else {
                    _printer.printText( " SYSTEM " );
                    printDoctypeURL( _docTypeSystemId );
                }

                // If we accumulated any DTD contents while printing.
                // this would be the place to print it.
                if (dtd != null && dtd.length() > 0) {
                    _printer.printText( " [" );
                    printText( dtd, true, true );
                    _printer.printText( ']' );
                }

                _printer.printText( ">" );
                _printer.breakLine();
            } else if (dtd != null && dtd.length() > 0) {
                _printer.printText( "<!DOCTYPE " );
                _printer.printText( name );
                _printer.printText( " [" );
                printText( dtd, true, true );
                _printer.printText( "]>" );
                _printer.breakLine();
            }
        }
    } 
    
    
    /**
     * Must be called by a method about to print any type of content.
     * If the element was just opened, the opening tag is closed and
     * will be matched to a closing tag. Returns the current element
     * state with <tt>empty</tt> and <tt>afterElement</tt> set to false.
     *
     * @return The current element state
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    protected ElementState content()
        throws IOException
    {
        ElementState state;

        state = getElementState();
        if ( ! isDocumentState() ) {
            // Need to close CData section first
            if ( state.inCData && ! state.doCData ) {
                _printer.printText( "]]>" );
                state.inCData = false;
            }
            // If this is the first content in the element,
            // change the state to not-empty and close the
            // opening element tag.
            if ( state.empty ) {
                _printer.printText( '>' );
                state.empty = false;
            }
            // Except for one content type, all of them
            // are not last element. That one content
            // type will take care of itself.
            state.afterElement = false;
            // Except for one content type, all of them
            // are not last comment. That one content
            // type will take care of itself.
            state.afterComment = false;
        }
        return state;
    }


    /**
     * Called to print the text contents in the prevailing element format.
     * Since this method is capable of printing text as CDATA, it is used
     * for that purpose as well. White space handling is determined by the
     * current element state. In addition, the output format can dictate
     * whether the text is printed as CDATA or unescaped.
     *
     * @param text The text to print
     * @param unescaped True is should print unescaped
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    protected void characters( String text )
        throws IOException
    {
        ElementState state;

        state = content();
        // Check if text should be print as CDATA section or unescaped
        // based on elements listed in the output format (the element
        // state) or whether we are inside a CDATA section or entity.

        if ( state.inCData || state.doCData ) {
            int          index;
            int          saveIndent;

            // Print a CDATA section. The text is not escaped, but ']]>'
            // appearing in the code must be identified and dealt with.
            // The contents of a text node is considered space preserving.
            if ( ! state.inCData ) {
                _printer.printText("<![CDATA[");
                state.inCData = true;
            }
            saveIndent = _printer.getNextIndent();
            _printer.setNextIndent( 0 );
            printCDATAText( text);
            _printer.setNextIndent( saveIndent );

        } else {

            int saveIndent;

            if ( state.preserveSpace ) {
                // If preserving space then hold of indentation so no
                // excessive spaces are printed at line breaks, escape
                // the text content without replacing spaces and print
                // the text breaking only at line breaks.
                saveIndent = _printer.getNextIndent();
                _printer.setNextIndent( 0 );
                printText( text, true, state.unescaped );
                _printer.setNextIndent( saveIndent );
            } else {
                printText( text, false, state.unescaped );
            }
        }
    }


    /**
     * Returns the suitable entity reference for this character value,
     * or null if no such entity exists. Calling this method with <tt>'&amp;'</tt>
     * will return <tt>"&amp;amp;"</tt>.
     *
     * @param ch Character value
     * @return Character entity name, or null
     */
    protected abstract String getEntityRef( int ch );


    /**
     * Called to serializee the DOM element. The element is serialized based on
     * the serializer's method (XML, HTML, XHTML).
     *
     * @param elem The element to serialize
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    protected abstract void serializeElement( Element elem )
        throws IOException;


    /**
     * Comments and PIs cannot be serialized before the root element,
     * because the root element serializes the document type, which
     * generally comes first. Instead such PIs and comments are
     * accumulated inside a vector and serialized by calling this
     * method. Will be called when the root element is serialized
     * and when the document finished serializing.
     *
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    protected void serializePreRoot()
        throws IOException
    {
        int i;

        if ( _preRoot != null ) {
            for ( i = 0 ; i < _preRoot.size() ; ++i ) {
                printText( (String) _preRoot.elementAt( i ), true, true );
                if ( _indenting )
                _printer.breakLine();
            }
            _preRoot.removeAllElements();
        }
    }


    //---------------------------------------------//
    // Text pretty printing and formatting methods //
    //---------------------------------------------//

    protected void printCDATAText( String text ) throws IOException {
        int length = text.length();
        char ch;

        for ( int index = 0 ; index <  length; ++index ) {
            ch = text.charAt( index );            
            if (ch == ']'
                && index + 2 < length
                && text.charAt(index + 1) == ']'
                && text.charAt(index + 2) == '>') { // check for ']]>'
                if (fDOMErrorHandler != null) {
                    // REVISIT: this means that if DOM Error handler is not registered we don't report any
                    // fatal errors and might serialize not wellformed document
                    if ((features & DOMSerializerImpl.SPLITCDATA) == 0) {
                        String msg = DOMMessageFormatter.formatMessage(
                            DOMMessageFormatter.SERIALIZER_DOMAIN,
                            "EndingCDATA",
                            null);    
                        if ((features & DOMSerializerImpl.WELLFORMED) != 0) {
                            // issue fatal error
                            modifyDOMError(msg, DOMError.SEVERITY_FATAL_ERROR, "wf-invalid-character", fCurrentNode);
                            fDOMErrorHandler.handleError(fDOMError);
                            throw new LSException(LSException.SERIALIZE_ERR, msg);
                        } 
                        else {
                            // issue error
                            modifyDOMError(msg, DOMError.SEVERITY_ERROR, "cdata-section-not-splitted", fCurrentNode);
                            if (!fDOMErrorHandler.handleError(fDOMError)) {
                                throw new LSException(LSException.SERIALIZE_ERR, msg);
                            }
                        }                        
                    } else {
                        // issue warning
                        String msg =
                            DOMMessageFormatter.formatMessage(
                                DOMMessageFormatter.SERIALIZER_DOMAIN,
                                "SplittingCDATA",
                                null);
                        modifyDOMError(
                            msg,
                            DOMError.SEVERITY_WARNING,
                            null, fCurrentNode);