/*******************************************************************************
 *  Copyright (c) 2000, 2009 IBM Corporation and others.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 * 
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.update.core.model;


import java.io.IOException;
import java.io.InputStream;

import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.update.internal.core.InternalFeatureParser;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;

/**
 * Default feature parser.
 * Parses the feature manifest file as defined by the platform. Defers
 * to a model factory to create the actual concrete model objects. The 
 * update framework supplies two factory implementations:
 * <ul>
 * <p>
 * <b>Note:</b> This class/interface is part of an interim API that is still under development and expected to
 * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
 * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
 * (repeatedly) as the API evolves.
 * </p>
 * <li>@see org.eclipse.update.core.model.FeatureModelFactory
 * <li>@see org.eclipse.update.core.BaseFeatureFactory
 * </ul>
 * 
 * @since 2.0
 * @deprecated The org.eclipse.update component has been replaced by Equinox p2. This
 * provisional API was never promoted to stable API, and may be removed from a future release of the platform.
 */
public class DefaultFeatureParser extends DefaultHandler {
	
	private InternalFeatureParser featureParser;


	// Current State Information
	//Stack stateStack = new Stack();

	// Current object stack (used to hold the current object we are
	// populating in this plugin descriptor
	//Stack objectStack = new Stack();

	/**
	 * Constructs a feature parser.
	 * 
	 * @since 2.0
	 */
	public DefaultFeatureParser() {
		super();
		featureParser = new InternalFeatureParser();
	}

	public void init(FeatureModelFactory factory) {
		init(factory, null);
	}
    
    /**
     * @param factory
     * @param location
     * @since 3.1
     */
    public void init(FeatureModelFactory factory, String location) {
    	
    	this.featureParser.init(factory, location);
    }

	/**
	 * Parses the specified input steam and constructs a feature model.
	 * The input stream is not closed as part of this operation.
	 * 
	 * @param in input stream
	 * @return feature model
	 * @exception SAXException
	 * @exception IOException
	 * @since 2.0
	 */
	public FeatureModel parse(InputStream in) throws SAXException, IOException {
		return featureParser.parse(in);
	}

	/**
	 * Returns all status objects accumulated by the parser.
	 *
	 * @return multi-status containing accumulated status, or <code>null</code>.
	 * @since 2.0
	 */
	public MultiStatus getStatus() {
		return featureParser.getStatus();
	}

	/**
	 * Handle start of element tags
	 * @see DefaultHandler#startElement(String, String, String, Attributes)
	 * @since 2.0
	 */
	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
		featureParser.startElement(uri, localName, qName, attributes);
		

	}

	/**
	 * Handle end of element tags
	 * @see DefaultHandler#endElement(String, String, String)
	 * @since 2.0
	 */
	public void endElement(String uri, String localName, String qName) {
		featureParser.endElement(uri, localName, qName);
	}
	

	/**
	 * Handle character text
	 * @see DefaultHandler#characters(char[], int, int)
	 * @since 2.0
	 */
	public void characters(char[] ch, int start, int length) {
		featureParser.characters(ch, start, length);
	}

	/**
	 * Handle errors
	 * @see DefaultHandler#error(SAXParseException)
	 * @since 2.0
	 */
	public void error(SAXParseException ex) {
		featureParser.error(ex);
	}

	/**
	 * Handle fatal errors
	 * @see DefaultHandler#fatalError(SAXParseException)
	 * @exception SAXException
	 * @since 2.0
	 */
	public void fatalError(SAXParseException ex) throws SAXException {
		featureParser.fatalError(ex);
	}

	/**
	 * @see org.xml.sax.ContentHandler#ignorableWhitespace(char[], int, int)
	 */
	public void ignorableWhitespace(char[] arg0, int arg1, int arg2) throws SAXException {
		featureParser.ignorableWhitespace(arg0, arg1, arg2);
	}
}