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/*
 * 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.Array;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

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

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

	public TypeCode getType(TypeTreeNode node) {
		TypeCode typeCode = 
			org.omg.CORBA.ORB.init().create_alias_tc(
				node.getJavaClass().getSimpleName(),
				node.getJavaClass().getSimpleName(),
				org.omg.CORBA.ORB.init().create_sequence_tc(0,
						TypeHelpersProxy.getType(node.getChildren()[0])));
		return typeCode;
	}

	public Object read(TypeTreeNode node, InputStream is) {
		Object sequence = null;
		try {
			int size = is.read_long();
			sequence = Array.newInstance(node.getChildren()[0].getJavaClass(),
					size);
			for (int i = 0; i < size; i++) {
				Array.set(sequence, i, TypeHelpersProxy.read(
						node.getChildren()[0], is));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return sequence;
	}

	public void write(TypeTreeNode node, OutputStream os, Object data) {
		int sum = 0;
		// determine length of array
		List<Object> array = new ArrayList<Object>();
		while (true) {
			try {
				array.add(Array.get(data, sum));
				sum++;
			} catch (ArrayIndexOutOfBoundsException e) {
				break;
			}
		}
		os.write_long(sum);
		Iterator<Object> iter = array.iterator();
		while (iter.hasNext()) {
			Object elem = iter.next();
			TypeHelpersProxy.write(node.getChildren()[0], os, elem);
		}

	}
}