/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.tuscany.sca.databinding.saxon;

import javax.xml.transform.dom.DOMSource;

import net.sf.saxon.Configuration;
import net.sf.saxon.event.Builder;
import net.sf.saxon.om.NodeInfo;
import net.sf.saxon.trans.XPathException;

import org.apache.tuscany.sca.databinding.PullTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.TransformationException;
import org.apache.tuscany.sca.databinding.impl.BaseTransformer;
import org.apache.tuscany.sca.databinding.impl.DOMHelper;
import org.w3c.dom.Node;

/**
 * Transforms DOM Node-s to NodeInfo objects needed by Saxon parser.
 *
 * Any namespaces that are defined are deleted, because otherwise
 * the SaxonB parser does not work
 *
 * @version $Rev$ $Date$
 */
public class Node2NodeInfoTransformer extends BaseTransformer<Node, NodeInfo> implements
    PullTransformer<Node, NodeInfo> {

    public NodeInfo transform(Node source, TransformationContext context) {      
        Configuration configuration = SaxonDataBindingHelper.CURR_EXECUTING_CONFIG;
        if (configuration == null) {
            configuration = new Configuration();
        }        
        
        NodeInfo docInfo = null;
        try {
            source = DOMHelper.promote(source);
            docInfo = Builder.build(new DOMSource(source), null, configuration);
        } catch (XPathException e) {
            throw new TransformationException(e);
        }
        return docInfo;
    }

    @Override
    protected Class<Node> getSourceType() {
        return Node.class;
    }

    @Override
    protected Class<NodeInfo> getTargetType() {
        return NodeInfo.class;
    }

    @Override
    public int getWeight() {
        return 10;
    }

}