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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.fo.extensions.svg;
-
- import javax.xml.transform.TransformerConfigurationException;
- import javax.xml.transform.dom.DOMResult;
- import javax.xml.transform.sax.SAXTransformerFactory;
- import javax.xml.transform.sax.TransformerHandler;
-
- import org.w3c.dom.DOMImplementation;
- import org.w3c.dom.Document;
-
- import org.xml.sax.Attributes;
- import org.xml.sax.ContentHandler;
- import org.xml.sax.SAXException;
-
- import org.apache.batik.dom.svg.SVGDOMImplementation;
-
- import org.apache.fop.util.ContentHandlerFactory;
- import org.apache.fop.util.DelegatingContentHandler;
-
- /**
- * ContentHandlerFactory which constructs ContentHandlers that build SVG DOM
- * Documents.
- */
- public class SVGDOMContentHandlerFactory implements ContentHandlerFactory {
-
- private static SAXTransformerFactory tFactory
- = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
-
- /**
- * Default Constructor.
- */
- public SVGDOMContentHandlerFactory() {
- // nop
- }
-
- /** {@inheritDoc} */
- public String[] getSupportedNamespaces() {
- return new String[] {SVGDOMImplementation.SVG_NAMESPACE_URI};
- }
-
- /** {@inheritDoc} */
- public ContentHandler createContentHandler() throws SAXException {
- return new Handler();
- }
-
- private static class Handler extends DelegatingContentHandler implements
- ContentHandlerFactory.ObjectSource {
-
- private Document doc;
- private ObjectBuiltListener obListener;
-
- public Handler() throws SAXException {
- super();
- }
-
- public Document getDocument() {
- return this.doc;
- }
-
- /** {@inheritDoc} */
- public Object getObject() {
- return getDocument();
- }
-
- /** {@inheritDoc} */
- public void setObjectBuiltListener(ObjectBuiltListener listener) {
- this.obListener = listener;
- }
-
- /** {@inheritDoc} */
- public void startDocument() throws SAXException {
- // Suppress startDocument() call if doc has not been set, yet. It
- // will be done later.
- if (doc != null) {
- super.startDocument();
- }
- }
-
- private DOMImplementation getDOMImplementation(String ver) {
- //TODO It would be great if Batik provided this method as static helper method.
- if (ver == null || ver.length() == 0
- || ver.equals("1.0") || ver.equals("1.1")) {
- return SVGDOMImplementation.getDOMImplementation();
- } else if (ver.equals("1.2")) {
- try {
- Class clazz = Class.forName(
- "org.apache.batik.dom.svg12.SVG12DOMImplementation");
- return (DOMImplementation)clazz.getMethod(
- "getDOMImplementation", (Class[])null).invoke(null, (Object[])null);
- } catch (Exception e) {
- return SVGDOMImplementation.getDOMImplementation();
- }
- }
- throw new RuntimeException("Unsupport SVG version '" + ver + "'");
- }
-
- /** {@inheritDoc} */
- public void startElement(String uri, String localName, String qName, Attributes atts)
- throws SAXException {
- if (doc == null) {
- TransformerHandler handler;
- try {
- handler = tFactory.newTransformerHandler();
- } catch (TransformerConfigurationException e) {
- throw new SAXException("Error creating a new TransformerHandler", e);
- }
- String version = atts.getValue("version");
- DOMImplementation domImplementation = getDOMImplementation(version);
- doc = domImplementation.createDocument(uri, qName, null);
- // It's easier to work with an empty document, so remove the
- // root element
- doc.removeChild(doc.getDocumentElement());
- handler.setResult(new DOMResult(doc));
- setDelegateContentHandler(handler);
- setDelegateLexicalHandler(handler);
- setDelegateDTDHandler(handler);
- handler.startDocument();
- }
- super.startElement(uri, localName, qName, atts);
- }
-
- /** {@inheritDoc} */
- public void endDocument() throws SAXException {
- super.endDocument();
- if (obListener != null) {
- obListener.notifyObjectBuilt(getObject());
- }
- }
-
- }
-
- }
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