basemarkupserializer.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 1,887 行 · 第 1/5 页

    {
        if ( _prepared )
            return;

        if ( _writer == null && _output == null ) {
            String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.SERIALIZER_DOMAIN,
                                                           "NoWriterSupplied", null);
            throw new IOException(msg);
        }
        // If the output stream has been set, use it to construct
        // the writer. It is possible that the serializer has been
        // reused with the same output stream and different encoding.

        _encodingInfo = _format.getEncodingInfo();

        if ( _output != null ) {
            _writer = _encodingInfo.getWriter(_output);
        }

        if ( _format.getIndenting() ) {
            _indenting = true;
            _printer = new IndentPrinter( _writer, _format );
        } else {
            _indenting = false;
            _printer = new Printer( _writer, _format );
        }

        ElementState state;

        _elementStateCount = 0;
        state = _elementStates[ 0 ];
        state.namespaceURI = null;
        state.localName = null;
        state.rawName = null;
        state.preserveSpace = _format.getPreserveSpace();
        state.empty = true;
        state.afterElement = false;
        state.afterComment = false;
        state.doCData = state.inCData = false;
        state.prefixes = null;

        _docTypePublicId = _format.getDoctypePublic();
        _docTypeSystemId = _format.getDoctypeSystem();
        _started = false;
        _prepared = true;
    }



    //----------------------------------//
    // DOM document serializing methods //
    //----------------------------------//


    /**
     * Serializes the DOM element using the previously specified
     * writer and output format. Throws an exception only if
     * an I/O exception occured while serializing.
     *
     * @param elem The element to serialize
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    public void serialize( Element elem )
        throws IOException
    {
        reset();
        prepare();
        serializeNode( elem );
        _printer.flush();
        if ( _printer.getException() != null )
            throw _printer.getException();
    }


    /**
     * Serializes the DOM document fragmnt using the previously specified
     * writer and output format. Throws an exception only if
     * an I/O exception occured while serializing.
     *
     * @param elem The element to serialize
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    public void serialize( DocumentFragment frag )
        throws IOException
    {
        reset();
        prepare();
        serializeNode( frag );
        _printer.flush();
        if ( _printer.getException() != null )
            throw _printer.getException();
    }


    /**
     * Serializes the DOM document using the previously specified
     * writer and output format. Throws an exception only if
     * an I/O exception occured while serializing.
     *
     * @param doc The document to serialize
     * @throws IOException An I/O exception occured while
     *   serializing
     */
    public void serialize( Document doc )
        throws IOException
    {
        reset();
        prepare();
        serializeNode( doc );
        serializePreRoot();
        _printer.flush();
        if ( _printer.getException() != null )
            throw _printer.getException();
    }


    //------------------------------------------//
    // SAX document handler serializing methods //
    //------------------------------------------//


    public void startDocument()
        throws SAXException
    {
        try {
            prepare();
        } catch ( IOException except ) {
            throw new SAXException( except.toString() );
        }
        // Nothing to do here. All the magic happens in startDocument(String)
    }
    
    
    public void characters( char[] chars, int start, int length )
        throws SAXException
    {
        ElementState state;

        try {
        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          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 );
            char ch;
            for ( int index = start ; index < length ; ++index ) {
                ch = chars[index];
                if ( ch == ']' && index + 2 < length &&
                     chars[ index + 1 ] == ']' && chars[ index + 2 ] == '>' ) {
                    _printer.printText("]]]]><![CDATA[>");
                    index +=2; 
                    continue;
                }
                if (!XMLChar.isValid(ch)) {
                    // check if it is surrogate
                    if (++index <length) {
                        surrogates(ch, chars[index]);
                    } 
                    else {
                        fatalError("The character '"+(char)ch+"' is an invalid XML character"); 
                    }
                    continue;
                } else {
                    if ( ( ch >= ' ' && _encodingInfo.isPrintable((char)ch) && ch != 0xF7 ) ||
                        ch == '\n' || ch == '\r' || ch == '\t' ) {
                        _printer.printText((char)ch);
                    } else {
                        // The character is not printable -- split CDATA section
                        _printer.printText("]]>&#x");                        
                        _printer.printText(Integer.toHexString(ch));                        
                        _printer.printText(";<![CDATA[");
                    }
                }
            }
            _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( chars, start, length, true, state.unescaped );
                _printer.setNextIndent( saveIndent );
            } else {
                printText( chars, start, length, false, state.unescaped );
            }
        }
        } catch ( IOException except ) {
            throw new SAXException( except );
        }
    }


    public void ignorableWhitespace( char[] chars, int start, int length )
        throws SAXException
    {
        int i;

        try {
        content();

        // Print ignorable whitespaces only when indenting, after
        // all they are indentation. Cancel the indentation to
        // not indent twice.
        if ( _indenting ) {
            _printer.setThisIndent( 0 );
            for ( i = start ; length-- > 0 ; ++i )
                _printer.printText( chars[ i ] );
        }
        } catch ( IOException except ) {
            throw new SAXException( except );
        }
    }


    public final void processingInstruction( String target, String code )
        throws SAXException
    {
        try {
            processingInstructionIO( target, code );
        } catch ( IOException except ) {
        throw new SAXException( except );
        }
    }

    public void processingInstructionIO( String target, String code )
        throws IOException
    {
        int          index;
        ElementState state;

        state = content();

        // Create the processing instruction textual representation.
        // Make sure we don't have '?>' inside either target or code.
        index = target.indexOf( "?>" );
        if ( index >= 0 )
            fStrBuffer.append( "<?" ).append( target.substring( 0, index ) );
        else
            fStrBuffer.append( "<?" ).append( target );
        if ( code != null ) {
            fStrBuffer.append( ' ' );
            index = code.indexOf( "?>" );
            if ( index >= 0 )
                fStrBuffer.append( code.substring( 0, index ) );
            else
                fStrBuffer.append( code );
        }
        fStrBuffer.append( "?>" );

        // If before the root element (or after it), do not print
        // the PI directly but place it in the pre-root vector.
        if ( isDocumentState() ) {
            if ( _preRoot == null )
                _preRoot = new Vector();
            _preRoot.addElement( fStrBuffer.toString() );
        } else {
            _printer.indent();
            printText( fStrBuffer.toString(), true, true );
            _printer.unindent();
            if ( _indenting )
            state.afterElement = true;
        }

        fStrBuffer.setLength(0);
    }


    public void comment( char[] chars, int start, int length )
        throws SAXException
    {
        try {
        comment( new String( chars, start, length ) );
        } catch ( IOException except ) {
            throw new SAXException( except );
    }
    }


    public void comment( String text )
        throws IOException
    {
        int          index;
        ElementState state;
        
        if ( _format.getOmitComments() )
            return;

        state  = content();
        // Create the processing comment textual representation.
        // Make sure we don't have '-->' inside the comment.
        index = text.indexOf( "-->" );
        if ( index >= 0 )
            fStrBuffer.append( "<!--" ).append( text.substring( 0, index ) ).append( "-->" );
        else
            fStrBuffer.append( "<!--" ).append( text ).append( "-->" );

        // If before the root element (or after it), do not print
        // the comment directly but place it in the pre-root vector.
        if ( isDocumentState() ) {
            if ( _preRoot == null )
                _preRoot = new Vector();
            _preRoot.addElement( fStrBuffer.toString() );
        } else {
            // Indent this element on a new line if the first
            // content of the parent element or immediately
            // following an element.
            if ( _indenting && ! state.preserveSpace)
                _printer.breakLine();
						_printer.indent();
            printText( fStrBuffer.toString(), true, true );
						_printer.unindent();
            if ( _indenting )
                state.afterElement = true;
        }

        fStrBuffer.setLength(0);
	state.afterComment = true;
	state.afterElement = false;
    }


    public void startCDATA()
    {
        ElementState state;

        state = getElementState();
        state.doCData = true;
    }


    public void endCDATA()
    {
        ElementState state;

        state = getElementState();
        state.doCData = false;
    }


    public void startNonEscaping()
    {
        ElementState state;

        state = getElementState();
        state.unescaped = true;
    }


    public void endNonEscaping()
    {
        ElementState state;

        state = getElementState();
        state.unescaped = false;
    }