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Java > Open Source Codes > org > apache > tapestry > IAction


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;
16
17 /**
18  * A particular type of component usuable with the
19  * action service.
20  *
21  * @author Howard Lewis Ship
22  * @since 1.0.1
23  */
24
25 public interface IAction extends IComponent
26 {
27     /**
28      * Returns true if the component requires
29      * an existing, not new, {@link javax.servlet.http.HttpSession}
30      * to operate. Components who are not dependant on page state
31      * (or the visit object) are non-stateful and can return false.
32      *
33      **/
34
35     public boolean getRequiresSession();
36 }
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