/*
* ====================================================================
*
* Frame2 Open Source License
*
* Copyright (c) 2004-2007 Megatome Technologies. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by
* Megatome Technologies."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Frame2 Project", and "Frame2",
* must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact iamthechad@sourceforge.net.
*
* 5. Products derived from this software may not be called "Frame2"
* nor may "Frame2" appear in their names without prior written
* permission of Megatome Technologies.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL MEGATOME TECHNOLOGIES OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/
package org.megatome.frame2.util.sax;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.megatome.frame2.log.Logger;
import org.megatome.frame2.log.LoggerFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
public class Frame2SAXReader extends DefaultHandler {
private static Logger LOGGER = LoggerFactory.instance(Frame2SAXReader.class.getName());
private Map<String, ElementHandler> handlers = new HashMap<String, ElementHandler>();
private List<String> elementsWithNoHandlers = new ArrayList<String>();
private Stack<ElementHandler> stack = new Stack<ElementHandler>();
public void setElementHandler(String name, ElementHandler handler) {
this.handlers.put(name, handler);
}
public void setElement(String name) {
this.elementsWithNoHandlers.add(name);
}
public void parse(InputStream io) throws ParserException {
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(true);
factory.setNamespaceAware(true);
SAXParser parser = factory.newSAXParser();
XMLReader reader = parser.getXMLReader();
reader.setContentHandler(this);
reader.setErrorHandler(new Frame2ParseErrorHandler());
reader.setEntityResolver(new Frame2EntityResolver());
InputSource is = new InputSource(io);
reader.parse(is);
} catch (ParserConfigurationException ex) {
throw new ParserException(ex);
} catch (SAXException ex) {
throw new ParserException(ex);
} catch (IOException ex) {
throw new ParserException(ex);
}
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws ParserException {
ElementHandler handler = this.handlers.get(qName);
if (handler == null) {
if (!this.elementsWithNoHandlers.contains(qName)) {
LOGGER.severe("Frame2XMLReader Handler not found " + qName); //$NON-NLS-1$
return;
}
}
this.stack.push(handler);
if (handler != null) {
handler.startElement(uri, localName, qName, attributes);
}
}
@Override
public void endElement(String uri, String localName, String qName)
throws ParserException {
ElementHandler handler = this.stack.pop();
if (handler != null) {
try {
handler.endElement(uri, localName, qName);
} catch (SAXException ex) {
throw new ParserException(ex);
}
}
}
@Override
public void characters(char[] ch, int start, int length)
throws ParserException {
ElementHandler handler = this.stack.peek();
if (handler != null) {
try {
handler.characters(ch, start, length);
} catch (SAXException ex) {
throw new ParserException(ex);
}
}
}
}