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Java > Open Source Codes > org > apache > tapestry > engine > BaseEngine


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.engine;
16
17 import java.util.Collection JavaDoc;
18 import java.util.Collections JavaDoc;
19
20 import org.apache.tapestry.IRequestCycle;
21
22 /**
23  * Concrete implementation of {@link org.apache.tapestry.IEngine} used for ordinary applications.
24  * All page state information is maintained in the {@link javax.servlet.http.HttpSession} using
25  * instances of {@link org.apache.tapestry.record.SessionPageRecorder}.
26  *
27  * @author Howard Lewis Ship
28  */
29
30 public class BaseEngine extends AbstractEngine
31 {
32     /**
33      * Returns an unmodifiable {@link Collection} of the page names for which {@link IPageRecorder}
34      * instances exist. Note: Starting in 4.0, this method is deprecated and returns an empty list.
35      *
36      * @deprecated
37      */
38
39     public Collection JavaDoc getActivePageNames()
40     {
41         return Collections.EMPTY_LIST;
42
43     }
44 }
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