1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.xerces.internal.xs.datatypes; 22 23 import java.util.List; 24 25 /** 26 * <p>The <code>ObjectList</code> is an immutable ordered collection of 27 * <code>Object</code>.</p> 28 * 29 * @author Ankit Pasricha, IBM 30 * 31 * @LastModified: Oct 2017 32 */ 33 public interface ObjectList extends List<Object> { 34 35 /** 36 * The number of <code>Object</code>s in the list. The range of 37 * valid child object indices is 0 to <code>length-1</code> inclusive. 38 */ 39 public int getLength(); 40 41 /** 42 * Checks if the <code>Object</code> <code>item</code> is a 43 * member of this list. 44 * @param item <code>Object</code> whose presence in this list 45 * is to be tested. 46 * @return True if this list contains the <code>Object</code> 47 * <code>item</code>. 48 */ 49 public boolean contains(Object item); 50 51 /** 52 * Returns the <code>index</code>th item in the collection or 53 * <code>null</code> if <code>index</code> is greater than or equal to 54 * the number of objects in the list. The index starts at 0. 55 * @param index index into the collection. 56 * @return The <code>Object</code> at the <code>index</code>th 57 * position in the <code>ObjectList</code>, or <code>null</code> if 58 * the index specified is not valid - greater than or equal to the 59 * number of items in the list or less than zero. 60 */ 61 public Object item(int index); 62 63 }