graphtoxgmmlsaxhandler.java

OpenJGraph是一个开源的Java库

         */
        public void endSerializeEdge( Edge edge ) throws Exception {
            this.commonHandler.endSerializeEdge( edge );
        }

        /**
         * Calls <tt>CommonHandler.endSerialize()</tt>
         */
        public void endSerialize() throws Exception {
            this.commonHandler.endSerialize();
        }
    }

    /**
     * Inner class delegate of <tt>GraphToXGMMLSAXHandler</tt> for
     * serializing <tt>VisualGraph</tt> objects and not <tt>Graph</tt> objects.
     *
     * @author  Jesus M. Salvo Jr.
     */
    class VisualGraphHandler extends GraphToXGMMLSAXHandler {

        private VisualGraph     vGraph;
        private CommonHandler   commonHandler;
        private GraphHandler    graphHandler;

        public VisualGraphHandler( GraphToXMLEventGenerator eventGenerator,
                XMLSerializer serializer, CommonHandler commonHandler ) {
            super( eventGenerator, serializer );
            this.commonHandler = commonHandler;
            this.graphHandler = new GraphHandler( eventGenerator, serializer, this.commonHandler );
        }

        /**
         * Empty method implementation
         */
        public void startSerialize( Graph graph ) throws Exception {}

        /**
         * Serializes the <tt>&lt;graph&gt;</tt> element, including setting the
         * <tt>Graphic</tt> attribute to <tt>1</tt>.
         */
        public void startSerialize( VisualGraph vGraph ) throws Exception {
            this.vGraph = vGraph;
            this.commonHandler.startSerialize( vGraph.getGraph() );

            // Serialize the beginning tag of the graph element
            AttributesImpl attrs = new AttributesImpl();

            // Add the Graphic attribute
            attrs.addAttribute( "",
                XGMML.GRAPHIC_ATTRIBUTE_LITERAL, XGMML.GRAPHIC_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.BOOLEAN_TYPE_STRINGPOOL_INDEX ),
                this.commonHandler.sPool.toString( this.commonHandler.ONE_LITERAL_STRINGPOOL_INDEX ));
            // Add the Vendor attribute
            attrs.addAttribute( "",
                XGMML.VENDOR_ATTRIBUTE_LITERAL, XGMML.VENDOR_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                this.commonHandler.sPool.toString( this.commonHandler.OPENJGRAPH_LITERAL_STRINGPOOL_INDEX ));
            // Add the directed attribute
            attrs.addAttribute( "",
                XGMML.DIRECTED_ATTRIBUTE_LITERAL, XGMML.DIRECTED_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.BOOLEAN_TYPE_STRINGPOOL_INDEX ),
                vGraph.getGraph() instanceof DirectedGraph ?
                    this.commonHandler.sPool.toString( this.commonHandler.ONE_LITERAL_STRINGPOOL_INDEX ) :
                    this.commonHandler.sPool.toString( this.commonHandler.ZERO_LITERAL_STRINGPOOL_INDEX ));

            this.commonHandler.getReaderAdapter().startElement( "",
                XGMML.GRAPH_ELEMENT_LITERAL, XGMML.GRAPH_ELEMENT_LITERAL, attrs );

            // Serialize the att element for other meta information about the graph
            this.commonHandler.serializeOtherGraphMetaInformation();

            // =============NOTE: Need to also serialize vertexPainterFactory,
            // ============= EdgePainterFactory, and componentEditorFactory
            // Serialize the layoutmanager
            attrs.clear();
            // Add the name attribute
            attrs.addAttribute( "",
                XGMML.NAME_ATTRIBUTE_LITERAL, XGMML.NAME_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "layoutManager" );
            // Add the type attribute
            attrs.addAttribute( "",
                XGMML.TYPE_ATTRIBUTE_LITERAL, XGMML.TYPE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "string" );
            // Add the type attribute
            attrs.addAttribute( "",
                XGMML.VALUE_ATTRIBUTE_LITERAL, XGMML.VALUE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                this.vGraph.getGraphLayoutManager().getClass().getName() );

            this.commonHandler.getReaderAdapter().startElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL, attrs );
            this.commonHandler.getReaderAdapter().endElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL);
        }

        /**
         * Serializes the <tt>&lt;node&gt;</tt> element, including the
         * &ltgraphics&gt; element that describes the visual properties of the
         * <tt>VisualVertex</tt> as allowed by XGMML.
         * <p>
         * The corresponding <tt>VisualVertex</tt> of the specified <tt>Vertex</tt>
         * is obtained via tt>VisualGraph.getVisualVertex()</tt>.
         */
        public void serializeVertex( Vertex vertex ) throws Exception {
            XMLReaderAdapter    readerAdapter = this.commonHandler.getReaderAdapter();
            AttributesImpl  attrs = new AttributesImpl();

            this.graphHandler.serializeVertex( vertex );

            VisualVertex vVertex = this.vGraph.getVisualVertex( vertex );
            java.awt.geom.Rectangle2D bounds = vVertex.getBounds2D();

            attrs.addAttribute( "",
                XGMML.WIDTH_ATTRIBUTE_LITERAL, XGMML.WIDTH_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Double.toString(bounds.getWidth()) );
            attrs.addAttribute( "",
                XGMML.HEIGHT_ATTRIBUTE_LITERAL, XGMML.HEIGHT_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Double.toString(bounds.getHeight()) );
            attrs.addAttribute( "",
                XGMML.FONT_ATTRIBUTE_LITERAL, XGMML.FONT_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                vVertex.getFont().getName() );
            attrs.addAttribute( "",
                XGMML.VISIBLE_ATTRIBUTE_LITERAL, XGMML.VISIBLE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "true" );
            attrs.addAttribute( "",
                XGMML.FILL_ATTRIBUTE_LITERAL, XGMML.FILL_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Integer.toHexString( vVertex.getFillcolor().getRGB()) );
            attrs.addAttribute( "",
                XGMML.OUTLINE_ATTRIBUTE_LITERAL, XGMML.OUTLINE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Integer.toHexString( vVertex.getOutlinecolor().getRGB()) );

            readerAdapter.startElement( "",
                XGMML.GRAPHICS_ELEMENT_LITERAL, XGMML.GRAPHICS_ELEMENT_LITERAL, attrs );

            attrs.clear();
            attrs.addAttribute( "",
                XGMML.X_ATTRIBUTE_LITERAL, XGMML.X_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Double.toString(bounds.getCenterX()) );
            attrs.addAttribute( "",
                XGMML.Y_ATTRIBUTE_LITERAL, XGMML.Y_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Double.toString(bounds.getCenterY()) );
            readerAdapter.startElement( "",
                XGMML.CENTER_ELEMENT_LITERAL, XGMML.CENTER_ELEMENT_LITERAL, attrs );
            readerAdapter.endElement( "",
                XGMML.CENTER_ELEMENT_LITERAL, XGMML.CENTER_ELEMENT_LITERAL );

            attrs.clear();
            attrs.addAttribute( "",
                XGMML.NAME_ATTRIBUTE_LITERAL, XGMML.NAME_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "className" );
            attrs.addAttribute( "",
                XGMML.TYPE_ATTRIBUTE_LITERAL, XGMML.TYPE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ));
            attrs.addAttribute( "",
                XGMML.VALUE_ATTRIBUTE_LITERAL, XGMML.VALUE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                vVertex.getClass().getName() );
            readerAdapter.startElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL, attrs );
            readerAdapter.endElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL );

            attrs.clear();
            attrs.addAttribute( "",
                XGMML.NAME_ATTRIBUTE_LITERAL, XGMML.NAME_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "painter" );
            attrs.addAttribute( "",
                XGMML.TYPE_ATTRIBUTE_LITERAL, XGMML.TYPE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ));
            attrs.addAttribute( "",
                XGMML.VALUE_ATTRIBUTE_LITERAL, XGMML.VALUE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                vVertex.getPainter().getClass().getName());
            readerAdapter.startElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL, attrs );
            readerAdapter.endElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL );

            readerAdapter.endElement( "",
                XGMML.GRAPHIC_ATTRIBUTE_LITERAL, XGMML.GRAPHIC_ATTRIBUTE_LITERAL);
        }

        /**
         * Calls <tt>CommonHandler.endSerializeVertex()</tt>
         */
        public void endSerializeVertex( Vertex vertex ) throws Exception {
            this.commonHandler.endSerializeVertex( vertex );
        }

        /**
         * Serializes the <tt>&lt;edge&gt;</tt> element, including the
         * &ltgraphics&gt; element that describes the visual properties of the
         * <tt>VisualEdge</tt> as allowed by XGMML.
         * <p>
         * The corresponding <tt>VisualEdge</tt> of the specified <tt>Edge</tt>
         * is obtained via tt>VisualGraph.getVisualEdge()</tt>.
         */
        public void serializeEdge( Edge edge ) throws Exception {
            XMLReaderAdapter    readerAdapter = this.commonHandler.getReaderAdapter();
            AttributesImpl      attrs = new AttributesImpl();

            this.graphHandler.serializeEdge( edge );

            VisualEdge vEdge = this.vGraph.getVisualEdge( edge );

            attrs.addAttribute( "",
                XGMML.FONT_ATTRIBUTE_LITERAL, XGMML.FONT_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                vEdge.getFont().getName() );
            attrs.addAttribute( "",
                XGMML.VISIBLE_ATTRIBUTE_LITERAL, XGMML.VISIBLE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "true" );
            attrs.addAttribute( "",
                XGMML.FILL_ATTRIBUTE_LITERAL, XGMML.FILL_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Integer.toHexString( vEdge.getFillcolor().getRGB()) );
            attrs.addAttribute( "",
                XGMML.OUTLINE_ATTRIBUTE_LITERAL, XGMML.OUTLINE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                Integer.toHexString( vEdge.getOutlinecolor().getRGB()) );

            readerAdapter.startElement( "",
                XGMML.GRAPHICS_ELEMENT_LITERAL, XGMML.GRAPHICS_ELEMENT_LITERAL, attrs );

            readerAdapter.startElement( "",
                XGMML.LINE_ELEMENT_LITERAL, XGMML.LINE_ELEMENT_LITERAL,
                new AttributesImpl());


            double edgeSegment[] = new double[6];

            java.awt.geom.PathIterator pathIterator =
                vEdge.getGeneralPath().getPathIterator( null );
            while( !pathIterator.isDone() ) {
                int segmentType = pathIterator.currentSegment( edgeSegment );
                if( segmentType != java.awt.geom.PathIterator.SEG_CLOSE ) {
                    attrs.clear();
                    attrs.addAttribute( "",
                        XGMML.X_ATTRIBUTE_LITERAL, XGMML.X_ATTRIBUTE_LITERAL,
                        this.commonHandler.sPool.toString( this.commonHandler.DOUBLE_TYPE_STRINGPOOL_INDEX ),
                        Double.toString( edgeSegment[0] ));
                    attrs.addAttribute( "",
                        XGMML.Y_ATTRIBUTE_LITERAL, XGMML.Y_ATTRIBUTE_LITERAL,
                        this.commonHandler.sPool.toString( this.commonHandler.DOUBLE_TYPE_STRINGPOOL_INDEX ),
                        Double.toString( edgeSegment[1] ));
                    readerAdapter.startElement( "",
                        XGMML.POINT_ELEMENT_LITERAL, XGMML.POINT_ELEMENT_LITERAL,
                        attrs );
                    readerAdapter.endElement( "",
                        XGMML.POINT_ELEMENT_LITERAL, XGMML.POINT_ELEMENT_LITERAL );
                }
                pathIterator.next();
            }

            readerAdapter.endElement( "",
                XGMML.LINE_ELEMENT_LITERAL, XGMML.LINE_ELEMENT_LITERAL );

            attrs.clear();
            attrs.addAttribute( "",
                XGMML.NAME_ATTRIBUTE_LITERAL, XGMML.NAME_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "className" );
            attrs.addAttribute( "",
                XGMML.TYPE_ATTRIBUTE_LITERAL, XGMML.TYPE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ));
            attrs.addAttribute( "",
                XGMML.VALUE_ATTRIBUTE_LITERAL, XGMML.VALUE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                vEdge.getClass().getName() );
            readerAdapter.startElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL, attrs );
            readerAdapter.endElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL );

            attrs.clear();
            attrs.addAttribute( "",
                XGMML.NAME_ATTRIBUTE_LITERAL, XGMML.NAME_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                "painter" );
            attrs.addAttribute( "",
                XGMML.TYPE_ATTRIBUTE_LITERAL, XGMML.TYPE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ));
            attrs.addAttribute( "",
                XGMML.VALUE_ATTRIBUTE_LITERAL, XGMML.VALUE_ATTRIBUTE_LITERAL,
                this.commonHandler.sPool.toString( this.commonHandler.STRING_TYPE_STRINGPOOL_INDEX ),
                vEdge.getPainter().getClass().getName());
            readerAdapter.startElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL, attrs );
            readerAdapter.endElement( "",
                XGMML.ATT_ELEMENT_LITERAL, XGMML.ATT_ELEMENT_LITERAL );

            readerAdapter.endElement( "",
                XGMML.GRAPHIC_ATTRIBUTE_LITERAL, XGMML.GRAPHIC_ATTRIBUTE_LITERAL );

        }

        /**
         * Calls <tt>CommonHandler.endSerializeEdge()</tt>
         */
        public void endSerializeEdge( Edge edge ) throws Exception {
            this.commonHandler.endSerializeEdge( edge );
        }

        /**
         * Calls <tt>CommonHandler.endSerialize</tt>
         */
        public void endSerialize() throws Exception {
            this.commonHandler.endSerialize();
        }

    }
}