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Java > Open Source Codes > freemarker > testcase > models > LegacyList


1 /*
2  * Copyright (c) 2003 The Visigoth Software Society. All rights
3  * reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  *
12  * 2. Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in
14  * the documentation and/or other materials provided with the
15  * distribution.
16  *
17  * 3. The end-user documentation included with the redistribution, if
18  * any, must include the following acknowledgement:
19  * "This product includes software developed by the
20  * Visigoth Software Society (http://www.visigoths.org/)."
21  * Alternately, this acknowledgement may appear in the software itself,
22  * if and wherever such third-party acknowledgements normally appear.
23  *
24  * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
25  * project contributors may be used to endorse or promote products derived
26  * from this software without prior written permission. For written
27  * permission, please contact visigoths@visigoths.org.
28  *
29  * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
30  * nor may "FreeMarker" or "Visigoth" appear in their names
31  * without prior written permission of the Visigoth Software Society.
32  *
33  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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47  * This software consists of voluntary contributions made by many
48  * individuals on behalf of the Visigoth Software Society. For more
49  * information on the Visigoth Software Society, please see
50  * http://www.visigoths.org/
51  */

52
53 package freemarker.testcase.models;
54
55 import freemarker.template.*;
56 import java.util.*;
57
58 /**
59  * A little bridge class that subclasses the new SimpleList
60  * and still implements the deprecated TemplateListModel
61  */

62 public class LegacyList extends SimpleSequence {
63
64     private Iterator iterator;
65
66     /**
67      * Resets the cursor to the beginning of the list.
68      */

69     public synchronized void rewind() {
70         iterator = null;
71     }
72
73     /**
74      * @return true if the cursor is at the beginning of the list.
75      */

76     public synchronized boolean isRewound() {
77         return (iterator == null);
78     }
79
80     /**
81      * @return true if there is a next element.
82      */

83     public synchronized boolean hasNext() {
84         if (iterator == null) {
85             iterator = list.listIterator();
86         }
87         return iterator.hasNext();
88     }
89
90     /**
91      * @return the next element in the list.
92      */

93     public synchronized TemplateModel next() throws TemplateModelException {
94         if (iterator == null) {
95             iterator = list.listIterator();
96         }
97         if (iterator.hasNext()) {
98             return (TemplateModel)iterator.next();
99         } else {
100             throw new TemplateModelException("No more elements.");
101         }
102     }
103 }
104
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