// GraphTea Project: http://github.com/graphtheorysoftware/GraphTea
// Copyright (C) 2012 Graph Theory Software Foundation: http://GraphTheorySoftware.com
// Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
// Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
package graphtea.plugins.main.saveload.xmlparser;
import org.xml.sax.*;
/**
* The class reads XML documents according to specified DTD and
* translates all related events into GraphmlHandler events.
* <p>Usage sample:
* <pre>
* GraphmlParser parser = new GraphmlParser(...);
* parser.parse(new InputSource("..."));
* </pre>
* <p><b>Warning:</b> the class is machine generated. DO NOT MODIFY</p>
*/
public class GraphmlParser implements ContentHandler {
private java.lang.StringBuffer buffer;
private GraphmlHandler handler;
private java.util.Stack context;
private EntityResolver resolver;
/**
* Creates a parser instance.
*
* @param handler handler interface implementation (never <code>null</code>
* @param resolver SAX entity resolver implementation or <code>null</code>.
* It is recommended that it could be able to resolve at least the DTD.
*/
public GraphmlParser(final GraphmlHandler handler, final EntityResolver resolver) {
this.handler = handler;
this.resolver = resolver;
buffer = new StringBuffer(111);
context = new java.util.Stack();
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void setDocumentLocator(Locator locator) {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void startDocument() throws SAXException {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void endDocument() throws SAXException {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void startElement(java.lang.String ns, java.lang.String name, java.lang.String qname, Attributes attrs) throws SAXException {
dispatch(true);
context.push(new Object[]{qname, new org.xml.sax.helpers.AttributesImpl(attrs)});
if ("edge".equals(qname)) {
handler.start_edge(attrs);
} else if ("locator".equals(qname)) {
handler.handle_locator(attrs);
} else if ("node".equals(qname)) {
handler.start_node(attrs);
} else if ("graph".equals(qname)) {
handler.start_graph(attrs);
} else if ("endpoint".equals(qname)) {
handler.start_endpoint(attrs);
} else if ("graphml".equals(qname)) {
handler.start_graphml(attrs);
} else if ("hyperedge".equals(qname)) {
handler.start_hyperedge(attrs);
} else if ("port".equals(qname)) {
handler.start_port(attrs);
}
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void endElement(java.lang.String ns, java.lang.String name, java.lang.String qname) throws SAXException {
dispatch(false);
context.pop();
if ("edge".equals(qname)) {
handler.end_edge();
} else if ("node".equals(qname)) {
handler.end_node();
} else if ("graph".equals(qname)) {
handler.end_graph();
} else if ("endpoint".equals(qname)) {
handler.end_endpoint();
} else if ("graphml".equals(qname)) {
handler.end_graphml();
} else if ("hyperedge".equals(qname)) {
handler.end_hyperedge();
} else if ("port".equals(qname)) {
handler.end_port();
}
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void characters(char[] chars, int start, int len) throws SAXException {
buffer.append(chars, start, len);
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void ignorableWhitespace(char[] chars, int start, int len) throws SAXException {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void processingInstruction(java.lang.String target, java.lang.String data) throws SAXException {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void startPrefixMapping(final java.lang.String prefix, final java.lang.String uri) throws SAXException {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void endPrefixMapping(final java.lang.String prefix) throws SAXException {
}
/**
* This SAX interface method is implemented by the parser.
*/
public final void skippedEntity(java.lang.String name) throws SAXException {
}
private void dispatch(final boolean fireOnlyIfMixed) throws SAXException {
if (fireOnlyIfMixed && buffer.length() == 0) return; //skip it
Object[] ctx = (Object[]) context.peek();
String here = (String) ctx[0];
Attributes attrs = (Attributes) ctx[1];
if ("key".equals(here)) {
if (fireOnlyIfMixed) throw new IllegalStateException("Unexpected characters() event! (Missing DTD?)");
handler.handle_key(buffer.length() == 0 ? null : buffer.toString(), attrs);
} else if ("data".equals(here)) {
if (fireOnlyIfMixed) throw new IllegalStateException("Unexpected characters() event! (Missing DTD?)");
handler.handle_data(buffer.length() == 0 ? null : buffer.toString(), attrs);
} else if ("desc".equals(here)) {
if (fireOnlyIfMixed) throw new IllegalStateException("Unexpected characters() event! (Missing DTD?)");
handler.handle_desc(buffer.length() == 0 ? null : buffer.toString(), attrs);
} else {
//do not care
}
buffer.delete(0, buffer.length());
}
/**
* The recognizer entry method taking an InputSource.
*
* @param input InputSource to be parsed.
* @throws java.io.IOException on I/O error.
* @throws SAXException propagated exception thrown by a DocumentHandler.
* @throws javax.xml.parsers.ParserConfigurationException
* a parser satisfining requested configuration can not be created.
* @throws javax.xml.parsers.FactoryConfigurationRrror
* if the implementation can not be instantiated.
*/
public void parse(final InputSource input) throws SAXException, javax.xml.parsers.ParserConfigurationException, java.io.IOException {
parse(input, this);
}
/**
* The recognizer entry method taking a URL.
*
* @param url URL source to be parsed.
* @throws java.io.IOException on I/O error.
* @throws SAXException propagated exception thrown by a DocumentHandler.
* @throws javax.xml.parsers.ParserConfigurationException
* a parser satisfining requested configuration can not be created.
*/
public void parse(final java.net.URL url) throws SAXException, javax.xml.parsers.ParserConfigurationException, java.io.IOException {
parse(new InputSource(url.toExternalForm()), this);
}
/**
* The recognizer entry method taking an Inputsource.
*
* @param input InputSource to be parsed.
* @throws java.io.IOException on I/O error.
* @throws SAXException propagated exception thrown by a DocumentHandler.
* @throws javax.xml.parsers.ParserConfigurationException
* a parser satisfining requested configuration can not be created.
* @throws javax.xml.parsers.FactoryConfigurationRrror
* if the implementation can not be instantiated.
*/
public static void parse(final InputSource input, final GraphmlHandler handler) throws SAXException, javax.xml.parsers.ParserConfigurationException, java.io.IOException {
parse(input, new GraphmlParser(handler, null));
}
/**
* The recognizer entry method taking a URL.
*
* @param url URL source to be parsed.
* @throws java.io.IOException on I/O error.
* @throws SAXException propagated exception thrown by a DocumentHandler.
* @throws javax.xml.parsers.ParserConfigurationException
* a parser satisfining requested configuration can not be created.
* @throws javax.xml.parsers.FactoryConfigurationRrror
* if the implementation can not be instantiated.
*/
public static void parse(final java.net.URL url, final GraphmlHandler handler) throws SAXException, javax.xml.parsers.ParserConfigurationException, java.io.IOException {
parse(new InputSource(url.toExternalForm()), handler);
}
private static void parse(final InputSource input, final GraphmlParser recognizer) throws SAXException, javax.xml.parsers.ParserConfigurationException, java.io.IOException {
javax.xml.parsers.SAXParserFactory factory = javax.xml.parsers.SAXParserFactory.newInstance();
factory.setValidating(false); //the code was generated according DTD
factory.setNamespaceAware(false); //the code was generated according DTD
XMLReader parser = factory.newSAXParser().getXMLReader();
parser.setContentHandler(recognizer);
parser.setErrorHandler(recognizer.getDefaultErrorHandler());
if (recognizer.resolver != null) parser.setEntityResolver(recognizer.resolver);
parser.parse(input);
}
/**
* Creates default error handler used by this parser.
*
* @return org.xml.sax.ErrorHandler implementation
*/
protected ErrorHandler getDefaultErrorHandler() {
return new ErrorHandler() {
public void error(SAXParseException ex) throws SAXException {
if (context.isEmpty()) System.err.println("Missing DOCTYPE.");
throw ex;
}
public void fatalError(SAXParseException ex) throws SAXException {
throw ex;
}
public void warning(SAXParseException ex) throws SAXException {
// ignore
}
};
}
}