/*

 */

/*

 * 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 com.sun.org.apache.xerces.internal.xs.datatypes;

import java.util.List;

/**

 * <p>The <code>ObjectList</code> is an immutable ordered collection of

 * <code>Object</code>.</p>

 *

 * @author Ankit Pasricha, IBM

 *

 */

    /**

     * The number of <code>Object</code>s in the list. The range of

     * valid child object indices is 0 to <code>length-1</code> inclusive.

     */

    public int getLength();

    /**

     * Checks if the <code>Object</code> <code>item</code> is a

     * member of this list.

     * @param item  <code>Object</code> whose presence in this list

     *   is to be tested.

     * @return  True if this list contains the <code>Object</code>

     *   <code>item</code>.

     */

    public boolean contains(Object item);

    /**

     * Returns the <code>index</code>th item in the collection or

     * <code>null</code> if <code>index</code> is greater than or equal to

     * the number of objects in the list. The index starts at 0.

     * @param index  index into the collection.

     * @return  The <code>Object</code> at the <code>index</code>th

     *   position in the <code>ObjectList</code>, or <code>null</code> if

     *   the index specified is not valid - greater than or equal to the

     *   number of items in the list or less than zero.

     */

    public Object item(int index);

}