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Java > Open Source Codes > org > openlaszlo > iv > flash > context > StandardContext


1 /*
2  * $Id: StandardContext.java,v 1.2 2002/02/15 23:44:28 skavish Exp $
3  *
4  * ===========================================================================
5  *
6  * The JGenerator Software License, Version 1.0
7  *
8  * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution, if
22  * any, must include the following acknowlegement:
23  * "This product includes software developed by Dmitry Skavish
24  * (skavish@usa.net, http://www.flashgap.com/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The name "The JGenerator" must not be used to endorse or promote
29  * products derived from this software without prior written permission.
30  * For written permission, please contact skavish@usa.net.
31  *
32  * 5. Products derived from this software may not be called "The JGenerator"
33  * nor may "The JGenerator" appear in their names without prior written
34  * permission of Dmitry Skavish.
35  *
36  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39  * DISCLAIMED. IN NO EVENT SHALL DMITRY SKAVISH OR THE OTHER
40  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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46  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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49  */
50
51 package org.openlaszlo.iv.flash.context;
52
53 import org.openlaszlo.iv.flash.util.PropertyManager;
54
55 import java.util.*;
56
57 /**
58  * Standard generator context of name,value pairs.
59  *
60  * @author Dmitry Skavish
61  * @author James Taylor
62  */
63 public class StandardContext extends Context {
64
65     private Hashtable table = new Hashtable();
66
67     /**
68      * Creates empty context.
69      */
70     public StandardContext() {}
71
72     /**
73      * Creates context from specified hashtable.
74      *
75      * @param table hashtable to be used as storage for name,value pairs
76      */
77     public StandardContext( Hashtable table ) {
78         this.table = table;
79     }
80
81     /**
82      * Creates context in specifed parent context.
83      *
84      * @param context parent context
85      */
86     public StandardContext( Context context ) {
87         setParent( context );
88     }
89
90     /**
91      * Puts specified value under specified name into this context.
92      *
93      * @param name the specified name
94      * @param value the specified value
95      */
96     public void setValue( String JavaDoc name, String JavaDoc value ) {
97         if( !PropertyManager.varCaseSensitive ) name = name.toUpperCase();
98         table.put(name, value);
99     }
100
101     /**
102      * Returns value by name from this context or from it's parent context.
103      *
104      * @param name name of the value to be retrieved
105      * @return value of the specified name
106      */
107     public String JavaDoc getValue( String JavaDoc name ) {
108         String JavaDoc _name = PropertyManager.varCaseSensitive? name: name.toUpperCase();
109         String JavaDoc value = (String JavaDoc) table.get(_name);
110         if( value != null ) return value;
111         return getValueFromParent(name);
112     }
113
114     protected StandardContext( StandardContext from ) {
115         table = (Hashtable) from.table.clone();
116         setParent( from.getParent() );
117     }
118
119     public Object JavaDoc clone() {
120         return new StandardContext(this);
121     }
122 }
123
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