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Java > Open Source Codes > org > apache > tapestry > form > AbstractRequirableField


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.form;
16
17 import org.apache.tapestry.IMarkupWriter;
18 import org.apache.tapestry.IRequestCycle;
19
20 /**
21  * Abstract requirable field implementation that delegates render and rewind
22  * logic to an implementation of {@link RequirableFieldSupport}.
23  *
24  * @author Paul Ferraro
25  * @since 4.0
26  */
27 public abstract class AbstractRequirableField extends AbstractFormComponent implements RequirableField
28 {
29     /**
30      * Injected.
31      */
32     public abstract RequirableFieldSupport getRequirableFieldSupport();
33     
34     /**
35      * May by used by required fields to override the default required message pattern.
36      * @param message
37      */
38     public abstract void setRequiredMessage(String JavaDoc message);
39     
40     /**
41      * @see org.apache.tapestry.form.AbstractFormComponent#rewindFormComponent(org.apache.tapestry.IRequestCycle)
42      */
43     protected void rewindFormComponent(IMarkupWriter writer, IRequestCycle cycle)
44     {
45         getRequirableFieldSupport().rewind(this, writer, cycle);
46     }
47     
48     /**
49      * @see org.apache.tapestry.form.RequirableField#getSubmittedValue(org.apache.tapestry.IRequestCycle)
50      */
51     public String JavaDoc getSubmittedValue(IRequestCycle cycle)
52     {
53         return cycle.getParameter(getName());
54     }
55     
56     /**
57      * @see org.apache.tapestry.form.AbstractFormComponent#renderFormComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle)
58      */
59     protected void renderFormComponent(IMarkupWriter writer, IRequestCycle cycle)
60     {
61         getRequirableFieldSupport().render(this, writer, cycle);
62     }
63 }
64
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