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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 java.util.HashMap;
import javax.xml.parsers.SAXParserFactory;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.ElementMapping;
import org.apache.batik.util.XMLResourceDescriptor;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.DOMImplementation;
/**
* Setup the SVG element mapping.
* This adds the svg element mappings used to create the objects
* that create the SVG Document.
*/
public class SVGElementMapping extends ElementMapping {
/** the SVG namespace */
public static final String URI = SVGDOMImplementation.SVG_NAMESPACE_URI;
/** logging instance */
protected Log log = LogFactory.getLog(SVGElementMapping.class);
private boolean batikAvailable = true;
/** Main constructor. */
public SVGElementMapping() {
namespaceURI = URI;
}
/** {@inheritDoc} */
public DOMImplementation getDOMImplementation() {
return SVGDOMImplementation.getDOMImplementation();
}
/**
* Returns the fully qualified classname of an XML parser for
* Batik classes that apparently need it (error messages, perhaps)
* @return an XML parser classname
*/
private String getAParserClassName() {
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
return factory.newSAXParser().getXMLReader().getClass().getName();
} catch (Exception e) {
return null;
}
}
/** {@inheritDoc} */
protected void initialize() {
if (foObjs == null && batikAvailable) {
// this sets the parser that will be used
// by default (SVGBrokenLinkProvider)
// normally the user agent value is used
try {
XMLResourceDescriptor.setXMLParserClassName(
getAParserClassName());
foObjs = new HashMap();
foObjs.put("svg", new SE());
foObjs.put(DEFAULT, new SVGMaker());
} catch (Throwable t) {
log.error("Error while initializing the Batik SVG extensions", t);
// if the classes are not available
// the DISPLAY is not checked
batikAvailable = false;
}
}
}
/** {@inheritDoc} */
public String getStandardPrefix() {
return "svg";
}
static class SVGMaker extends ElementMapping.Maker {
public FONode make(FONode parent) {
return new SVGObj(parent);
}
}
static class SE extends ElementMapping.Maker {
public FONode make(FONode parent) {
return new SVGElement(parent);
}
}
}
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