/*
 * 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.binding.corba.types.util;

import java.lang.reflect.Field;

import org.apache.tuscany.sca.binding.corba.types.TypeTreeNode;
import org.omg.CORBA.StructMember;
import org.omg.CORBA.TypeCode;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.OutputStream;

/**
 * @version $Rev$ $Date$
 */
public class StructTypeHelper implements TypeHelper {

	public TypeCode getType(TypeTreeNode node) {
		TypeTreeNode[] children = node.getChildren();
		if (children != null) {
			StructMember[] members = new StructMember[children.length];
			for (int i = 0; i < children.length; i++) {
				members[i] = new StructMember(children[i].getJavaClass()
						.getSimpleName(),
						TypeHelpersProxy.getType(children[i]), null);
			}
			TypeCode result = org.omg.CORBA.ORB.init().create_struct_tc(
					node.getJavaClass().getSimpleName(),
					node.getJavaClass().getSimpleName(), members);
			return result;
		} else {
			return null;
		}
	}

	public Object read(TypeTreeNode node, InputStream is) {
		TypeTreeNode[] children = node.getChildren();
		Object result = null;
		if (children != null) {
			try {
				result = node.getJavaClass().newInstance();
				for (int i = 0; i < children.length; i++) {
					Object childResult = TypeHelpersProxy.read(children[i], is);
					Field childField = result.getClass().getField(
							children[i].getName());
					childField.set(result, childResult);
				}
			} catch (Exception e) {
				// TODO: handle exception
				e.printStackTrace();
			}
		}
		return result;
	}

	public void write(TypeTreeNode node, OutputStream os, Object data) {
		TypeTreeNode[] children = node.getChildren();
		if (children != null) {
			try {
				for (int i = 0; i < children.length; i++) {
					Field childField = node.getJavaClass().getField(
							children[i].getName());
					TypeHelpersProxy.write(children[i], os, childField
							.get(data));
				}
			} catch (Exception e) {
				// TODO: handle exception
				e.printStackTrace();
			}
		}
	}

}