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.dom;
  22 
  23 import java.util.ArrayList;
  24 import java.util.List;
  25 import org.w3c.dom.DOMImplementation;
  26 import org.w3c.dom.DOMImplementationList;
  27 
  28 /**
  29  * <p>This class implements the DOM Level 3 Core interface DOMImplementationList.</p>
  30  *
  31  * @xerces.internal
  32  *
  33  * @author Neil Delima, IBM
  34  * @since DOM Level 3 Core
  35  * @LastModified: Oct 2017
  36  */
  37 public class DOMImplementationListImpl implements DOMImplementationList {
  38 
  39     //A collection of DOMImplementations
  40     private List<DOMImplementation> fImplementations;
  41 
  42     /**
  43      * Construct an empty list of DOMImplementations
  44      */
  45     public DOMImplementationListImpl() {
  46         fImplementations = new ArrayList<>();
  47     }
  48 
  49     /**
  50      * Construct an empty list of DOMImplementations
  51      */
  52     public DOMImplementationListImpl(List<DOMImplementation> params) {
  53         fImplementations = params;
  54     }
  55 
  56     /**
  57      * Returns the indexth item in the collection.
  58      *
  59      * @param index The index of the DOMImplemetation from the list to return.
  60      */
  61     public DOMImplementation item(int index) {
  62         try {
  63             return fImplementations.get(index);
  64         } catch (IndexOutOfBoundsException e) {
  65             return null;
  66         }
  67     }
  68 
  69     /**
  70      * Returns the number of DOMImplementations in the list.
  71      *
  72      * @return An integer indicating the number of DOMImplementations.
  73      */
  74     public int getLength() {
  75         return fImplementations.size();
  76     }
  77 }