/*
 * Copyright 2004,2005 The Apache Software Foundation.
 * Copyright 2006 International Business Machines Corp.
 *
 * 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.axis2.jaxws.message.impl;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.impl.builder.StAXOMBuilder;
import org.apache.axis2.jaxws.message.Block;
import org.apache.axis2.jaxws.message.MessageException;
import org.apache.axis2.jaxws.message.factory.BlockFactory;

/**
 * BlockFactoryImpl
 * Abstract Base Class for the Block Factories
 */
public abstract class BlockFactoryImpl implements BlockFactory {

	public BlockFactoryImpl() {
		super();
	}

	/* (non-Javadoc)
	 * @see org.apache.axis2.jaxws.message.BlockFactory#createFrom(org.apache.axis2.jaxws.message.Block, java.lang.Object)
	 */
	public Block createFrom(Block other, Object context) throws XMLStreamException, MessageException {
		// This is the default behavior.  Derived Factories may
		// provide a more performant implementation.
		if (other.getBlockFactory().equals(this)) {
            if (other.getBusinessContext() == null && 
                context == null) {
                return other;
            }
            else if (other.getBusinessContext() != null &&
                     other.getBusinessContext().equals(context)) {
                return other;
            }
		}
		QName qName= null;
		if (other.isQNameAvailable()) {
			qName = other.getQName();
		}
		Block newBlock = createFrom(other.getXMLStreamReader(true), context, qName);
        newBlock.setParent(other.getParent());
        return newBlock;
	}

	public Block createFrom(XMLStreamReader reader, Object context, QName qName) throws XMLStreamException {
		StAXOMBuilder builder = new StAXOMBuilder(reader);  
		OMElement omElement = builder.getDocumentElement();
		return createFrom(omElement, context, qName);
	}

	
	

}