/*
 *   Copyright 2006 The Apache Software Foundation
 *
 *   Licensed 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.
 *
 */
package org.apache.felix.declarativeservices.scr;

import java.io.Reader;
import java.util.Properties;

import org.kxml2.io.KXmlParser;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

/**
 * The KXml2SAXParser extends the XmlParser from kxml. This is a very
 * simple parser that does not take into account the DTD
 *
 */
public class KXml2SAXParser extends KXmlParser {
	
	public String uri="uri";

	private Reader reader;
	
	/**
	* The constructor for a parser, it receives a java.io.Reader.
	*
	* @param   reader  The reader
	* @throws XmlPullParserException 
	*/
	public KXml2SAXParser(Reader reader) throws XmlPullParserException {
		super();
		this.reader=reader;
	    setInput(reader);
	}
	
	/**
	* Parser from the reader provided in the constructor, and call
	* the startElement and endElement in a KxmlHandler
	*
	* @param   reader  The reader
	* @exception   Exception thrown by the superclass
	*/
	public void parseXML(KXml2SAXHandler handler) throws Exception {

		while (next() != XmlPullParser.END_DOCUMENT) {
			handler.setLineNumber(getLineNumber());
			handler.setColumnNumber(getColumnNumber());
			if (getEventType() == XmlPullParser.START_TAG) {
				Properties props = new Properties();
				for (int i = 0; i < getAttributeCount(); i++) {
					props.put(getAttributeName(i), getAttributeValue(i));
				}
				handler.startElement(
					getNamespace(),
					getName(),
					getName(),
					props);
			} else if (getEventType() == XmlPullParser.END_TAG) {
				handler.endElement(getNamespace(), getName(), getName());
			} else if (getEventType() == XmlPullParser.TEXT) {
				String text = getText();
				handler.characters(text.toCharArray(),0,text.length());
			} else if (getEventType() == XmlPullParser.PROCESSING_INSTRUCTION) {
				// TODO extract the target from the evt.getText()
				handler.processingInstruction(null,getText()); 
			} else {
				// do nothing
			}
		}
	}	
}