Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
PageClientPropertyPersistenceScope |
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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.record; | |
16 | ||
17 | import org.apache.tapestry.IPage; | |
18 | import org.apache.tapestry.IRequestCycle; | |
19 | import org.apache.tapestry.engine.ServiceEncoding; | |
20 | ||
21 | /** | |
22 | * Defines the 'page' scope for persisting client properties. Persist the properties only if the | |
23 | * current page name is the same as that of the property. | |
24 | * | |
25 | * @author Mindbridge | |
26 | * @since 4.0 | |
27 | * @see org.apache.tapestry.record.ClientPropertyPersistenceScope | |
28 | */ | |
29 | public class PageClientPropertyPersistenceScope extends | |
30 | AbstractPrefixedClientPropertyPersistenceScope | |
31 | { | |
32 | private IRequestCycle _requestCycle; | |
33 | ||
34 | public PageClientPropertyPersistenceScope() | |
35 | { | |
36 | 0 | super("state:"); |
37 | 0 | } |
38 | ||
39 | /** | |
40 | * Returns true if the active page name matches the page for this property. This means that | |
41 | * <em>after a new page has been activated</em>, the state is discarded. | |
42 | */ | |
43 | ||
44 | public boolean shouldEncodeState(ServiceEncoding encoding, String pageName, | |
45 | PersistentPropertyData data) | |
46 | { | |
47 | 0 | IPage page = _requestCycle.getPage(); |
48 | ||
49 | // TAPESTRY-701: if you try to generate a link using, say, page or external service, | |
50 | // from inside PageValidateListener.pageValidate(), then there may not be an active | |
51 | // page yet. Seems like the right thing to do is hold onto any properties until | |
52 | // we know what the active page is. I know this one is going to cause a fight | |
53 | // since its not clear whether keeping or discarding is the right way to go. | |
54 | ||
55 | 0 | if (page == null) |
56 | 0 | return true; |
57 | ||
58 | 0 | return pageName.equals(page.getPageName()); |
59 | } | |
60 | ||
61 | public void setRequestCycle(IRequestCycle requestCycle) | |
62 | { | |
63 | 0 | _requestCycle = requestCycle; |
64 | 0 | } |
65 | ||
66 | } |