KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > freemarker > ext > jython > JythonSequenceModel


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
34  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
35  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36  * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
37  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
40  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
41  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
42  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
43  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44  * SUCH DAMAGE.
45  * ====================================================================
46  *
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.ext.jython;
54
55 import org.python.core.PyException;
56 import org.python.core.PyObject;
57
58 import freemarker.ext.util.ModelFactory;
59 import freemarker.template.ObjectWrapper;
60 import freemarker.template.TemplateCollectionModel;
61 import freemarker.template.TemplateModel;
62 import freemarker.template.TemplateModelException;
63 import freemarker.template.TemplateModelIterator;
64 import freemarker.template.TemplateSequenceModel;
65
66 /**
67  * Model for Jython sequence objects ({@link org.python.core.PySequence} descendants).
68  * @version $Id: JythonSequenceModel.java,v 1.13 2003/11/12 21:53:40 ddekany Exp $
69  * @author Attila Szegedi
70  */
71 public class JythonSequenceModel
72 extends
73     JythonModel
74 implements
75     TemplateSequenceModel,
76     TemplateCollectionModel
77 {
78     static final ModelFactory FACTORY =
79         new ModelFactory()
80         {
81             public TemplateModel create(Object JavaDoc object, ObjectWrapper wrapper)
82             {
83                 return new JythonSequenceModel((PyObject)object, (JythonWrapper)wrapper);
84             }
85         };
86         
87     public JythonSequenceModel(PyObject object, JythonWrapper wrapper)
88     {
89         super(object, wrapper);
90     }
91
92     /**
93      * Returns {@link PyObject#__finditem__(int)}.
94      */
95     public TemplateModel get(int index) throws TemplateModelException
96     {
97         try
98         {
99             return wrapper.wrap(object.__finditem__(index));
100         }
101         catch(PyException e)
102         {
103             throw new TemplateModelException(e);
104         }
105     }
106
107     /**
108      * Returns {@link PyObject#__len__()}.
109      */
110     public int size() throws TemplateModelException
111     {
112         try
113         {
114             return object.__len__();
115         }
116         catch(PyException e)
117         {
118             throw new TemplateModelException(e);
119         }
120     }
121
122     public TemplateModelIterator iterator()
123     {
124         return new TemplateModelIterator()
125         {
126             int i = 0;
127             
128             public boolean hasNext() throws TemplateModelException
129             {
130                 return i < size();
131             }
132
133             public TemplateModel next() throws TemplateModelException
134             {
135                 return get(i++);
136             }
137         };
138     }
139 }
140
Popular Tags