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Java > Open Source Codes > com > sun > org > apache > xerces > internal > impl > xs > util > StringListImpl


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57
58 package com.sun.org.apache.xerces.internal.impl.xs.util;
59
60 import com.sun.org.apache.xerces.internal.xs.StringList;
61 import java.util.Vector JavaDoc;
62 /**
63  * Containts a list of Object's.
64  *
65  * @author Sandy Gao, IBM
66  *
67  * @version $Id: StringListImpl.java,v 1.5 2003/11/12 23:17:34 sandygao Exp $
68  */
69 public class StringListImpl implements StringList {
70
71     // The array to hold all data
72 private String JavaDoc[] fArray = null;
73     // Number of elements in this list
74 private int fLength = 0;
75
76     // REVISIT: this is temp solution. In general we need to use this class
77 // instead of the Vector.
78 private Vector JavaDoc fVector;
79
80     public StringListImpl(Vector JavaDoc v) {
81         fVector = v;
82         fLength = (v == null) ? 0 : v.size();
83     }
84
85     /**
86      * Construct an XSObjectList implementation
87      *
88      * @param array the data array
89      * @param length the number of elements
90      */
91     public StringListImpl(String JavaDoc[] array, int length) {
92         fArray = array;
93         fLength = length;
94     }
95
96     /**
97      * The number of <code>Objects</code> in the list. The range of valid
98      * child node indices is 0 to <code>length-1</code> inclusive.
99      */
100     public int getLength() {
101         return fLength;
102     }
103
104     /**
105      * Checks if the <code>GenericString</code> <code>item</code> is a member
106      * of this list.
107      * @param item <code>GenericString</code> whose presence in this list is
108      * to be tested.
109      * @return True if this list contains the <code>GenericString</code>
110      * <code>item</code>.
111      */
112     public boolean contains(String JavaDoc item) {
113         if (fVector != null)
114             return fVector.contains(item);
115         
116         if (item == null) {
117             for (int i = 0; i < fLength; i++) {
118                 if (fArray[i] == null)
119                     return true;
120             }
121         }
122         else {
123             for (int i = 0; i < fLength; i++) {
124                 if (item.equals(fArray[i]))
125                     return true;
126             }
127         }
128         return false;
129     }
130
131     public String JavaDoc item(int index) {
132         if (index < 0 || index >= fLength)
133             return null;
134         if (fVector != null) {
135             return (String JavaDoc)fVector.elementAt(index);
136         }
137         return fArray[index];
138     }
139
140 } // class XSParticle
141
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