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


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  * Implements the logic used by {@link RequiredField}s for required field checking on rewind
22  * and generating client-side logic during render.
23  *
24  * @author Paul Ferraro
25  * @since 4.0
26  */
27 public interface RequirableFieldSupport
28 {
29     /**
30      * Called by the {@link RequiredField} during render to generate client-side validation logic.
31      */
32     public void render(RequirableField component, IMarkupWriter writer, IRequestCycle cycle);
33
34     /**
35      * Called by the {@link RequiredField} during rewind to perform required field checking.
36      */
37     public void rewind(RequirableField component, IMarkupWriter writer, IRequestCycle cycle);
38 }
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