/*
 * Copyright 2009 Yuichiro Moriguchi
 *
 * 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 net.morilib.lisp.util;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;

public class ReflContainer {
	
	private Object       arr = null;
	private List<Object> lst = null;
	
	
	public ReflContainer(Class<?> cl, int len) {
		if(cl.isArray()) {
			arr = Array.newInstance(cl.getComponentType(), len);
		} else if(cl.isAssignableFrom(List.class)) {
			lst = new ArrayList<Object>(len);
		} else {
			throw new ClassCastException(cl.getName());
		}
	}
	
	
	public void set(int i, Object o) {
		if(arr != null) {
			Array.set(arr, i, o);
		} else if(lst != null) {
			lst.set(i, o);
		}
	}
	
	
	public Object toObject() {
		if(arr != null) {
			return arr;
		} else {
			return lst;
		}
	}
	
}
