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/*
 * (c) Copyright 2010-2011 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License (GPL).
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 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.databene.webdecs.xml;

import java.util.ArrayList;
import java.util.List;

import org.databene.commons.ArrayUtil;
import org.databene.commons.xml.XMLUtil;
import org.w3c.dom.Element;

/**
 * Provides context informations and operations for XML parsing.


 * Created: 05.12.2010 12:09:54
 * @since 0.5.4
 * @author Volker Bergmann
 */
public class ParseContext {
	
	protected XMLElementParserFactory factory;
	protected Class pathComponentType;
	
	public ParseContext(Class pathComponentType) {
		this(pathComponentType, new XMLElementParserFactory());
	}

	public ParseContext(Class pathComponentType, XMLElementParserFactory factory) {
		this.pathComponentType = pathComponentType;
		this.factory = factory;
	}

	public void addParser(XMLElementParser parser) {
		factory.addParser(parser);
	}

	public E parseElement(Element element, E[] parentPath) {
		XMLElementParser parser = factory.getParser(element, parentPath);
		return parser.parse(element, parentPath, this);
	}
	
	public List parseChildElementsOf(Element element, E[] currentPath) {
		List result = new ArrayList();
		for (Element childElement : XMLUtil.getChildElements(element))
			result.add(parseChildElement(childElement, currentPath));
		return result;
	}
	
	public E parseChildElement(Element childElement, E[] currentPath) {
		return parseElement(childElement, currentPath);
	}

	@SuppressWarnings("unchecked")
	public E[] createSubPath(E[] parentPath, E currentObject) {
		if (parentPath == null)
			return ArrayUtil.buildArrayOfType(pathComponentType, currentObject);
		else
			return ArrayUtil.append(parentPath, currentObject);
	}

}