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Java > Open Source Codes > org > apache > tapestry > script > SetRule


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.script;
16
17 import org.apache.tapestry.Tapestry;
18 import org.apache.tapestry.util.xml.BaseRule;
19 import org.apache.tapestry.util.xml.RuleDirectedParser;
20 import org.xml.sax.Attributes JavaDoc;
21
22 /**
23  * Constructs at {@link org.apache.tapestry.script.SetToken} from at <set> element,
24  * which contains full content.
25  *
26  * @author Howard Lewis Ship
27  * @since 3.0
28  */
29
30 class SetRule extends BaseRule
31 {
32     public void startElement(RuleDirectedParser parser, Attributes JavaDoc attributes)
33     {
34         String JavaDoc key = getAttribute(attributes, "key");
35
36         parser.validate(key, Tapestry.SIMPLE_PROPERTY_NAME_PATTERN, "ScriptParser.invalid-key");
37
38         String JavaDoc expression = getAttribute(attributes, "expression");
39
40         SetToken token = new SetToken(key, expression, parser.getLocation());
41
42         IScriptToken parent = (IScriptToken) parser.peek();
43         parent.addToken(token);
44
45         parser.push(token);
46     }
47
48     public void endElement(RuleDirectedParser parser)
49     {
50         parser.pop();
51     }
52 }
53
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