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Java > Open Source Codes > org > apache > tapestry > wml > GoFormSupportImpl


1 // Copyright 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.wml;
16
17 import org.apache.hivemind.HiveMind;
18 import org.apache.tapestry.IForm;
19 import org.apache.tapestry.IMarkupWriter;
20 import org.apache.tapestry.IRequestCycle;
21 import org.apache.tapestry.form.FormEventType;
22 import org.apache.tapestry.form.FormSupportImpl;
23
24 /**
25  * Subclass of {@link org.apache.tapestry.form.FormSupportImpl} that adjusts the output markup
26  * to conform to WML.
27  *
28  * @author Howard M. Lewis Ship
29  * @since 4.0
30  */
31 public class GoFormSupportImpl extends FormSupportImpl
32 {
33     public GoFormSupportImpl(IMarkupWriter writer, IRequestCycle cycle, IForm form)
34     {
35         super(writer, cycle, form);
36     }
37
38     protected void writeTag(IMarkupWriter writer, String JavaDoc method, String JavaDoc url)
39     {
40         writer.begin("go");
41         writer.attribute("method", method);
42         writer.attribute("href", url);
43     }
44
45     protected void writeHiddenField(IMarkupWriter writer, String JavaDoc name, String JavaDoc id, String JavaDoc value)
46     {
47         writer.beginEmpty("postfield");
48         writer.attribute("name", name);
49
50         if (HiveMind.isNonBlank(id))
51             writer.attribute("id", id);
52
53         writer.attribute("value", value);
54         writer.println();
55     }
56
57     public void addEventHandler(FormEventType type, String JavaDoc functionName)
58     {
59         throw new UnsupportedOperationException JavaDoc(
60                 "addEventHandler() not supported for WML Go component.");
61     }
62
63     protected String JavaDoc emitEventManagerInitialization()
64     {
65         return null;
66     }
67 }
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