NodeListImpl


1   /*
2    * @(#)HashMapNode.java 1.36 02/03/21
3    *
4    * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   package org.enhydra.xml;
8   
9   import java.util.ArrayList  ;
10  import java.util.List  ;
11  
12  import org.w3c.dom.Node  ;
13  import org.w3c.dom.NodeList  ;
14  
15  
16  
17  /**
18   * @author Tweety
19   * 
20   * A class representing a node in a meta-data tree, which implements
21   * the <a HREF="../../../../api/org/w3c/dom/NodeList.html">
22   *
23   * <p> Namespaces are ignored in this implementation.  The terms "tag
24   * name" and "node name" are always considered to be synonymous.
25   *
26   * @version 1.0
27   */
28  public class NodeListImpl implements NodeList   {
29  
30      /**
31       * List of <code>Node</code>s.
32       */
33      List   nodes;
34  
35  
36      /**
37       * Constructs an empty <code>NodeListImpl</code>.
38       */
39      public NodeListImpl() {
40          this.nodes = new ArrayList  ();
41      }
42      
43      
44      /**
45       * Constructs <code>NodeListImpl</code> with the given list of nodes.
46       * 
47       * @param nodes list of nodes.
48       */
49      public NodeListImpl(List   nodes) {
50          this.nodes = nodes;
51      }
52  
53  
54      /**
55       * Returns the count of nodes.
56       * 
57       * @return the count of nodes.
58       */
59      public int getLength() {
60          return nodes.size();
61      }
62  
63  
64      /**
65       * Returns the <code>Node</code> with the given index.
66       * 
67       * @param index node index.
68       * 
69       * @return the <code>Node</code> with the given index.
70       */
71      public Node   item(int index) {
72          if (index < 0 || index > nodes.size()) {
73              return null;
74          }
75          return (Node  ) nodes.get(index);
76      }
77  
78      
79      /**
80       * Appends the given list to the end of the existing one.
81       * 
82       * @param list list to add, as <code>NodeListImpl</code>.
83       * 
84       * @return this as </code>NodeList</code>.
85       */
86      public NodeList   append(NodeListImpl list) {
87          this.nodes.addAll(list.nodes);
88          return this;
89      }
90      
91  }
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