01: /*
02: * This file is part of the Echo Web Application Framework (hereinafter "Echo").
03: * Copyright (C) 2002-2005 NextApp, Inc.
04: *
05: * Version: MPL 1.1/GPL 2.0/LGPL 2.1
06: *
07: * The contents of this file are subject to the Mozilla Public License Version
08: * 1.1 (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: * http://www.mozilla.org/MPL/
11: *
12: * Software distributed under the License is distributed on an "AS IS" basis,
13: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14: * for the specific language governing rights and limitations under the
15: * License.
16: *
17: * Alternatively, the contents of this file may be used under the terms of
18: * either the GNU General Public License Version 2 or later (the "GPL"), or
19: * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20: * in which case the provisions of the GPL or the LGPL are applicable instead
21: * of those above. If you wish to allow use of your version of this file only
22: * under the terms of either the GPL or the LGPL, and not to allow others to
23: * use your version of this file under the terms of the MPL, indicate your
24: * decision by deleting the provisions above and replace them with the notice
25: * and other provisions required by the GPL or the LGPL. If you do not delete
26: * the provisions above, a recipient may use your version of this file under
27: * the terms of any one of the MPL, the GPL or the LGPL.
28: */
29:
30: package nextapp.echo2.webcontainer;
31:
32: import org.w3c.dom.Element;
33:
34: import nextapp.echo2.app.Component;
35:
36: /**
37: * An optional interface for <code>ComponentSynchronizePeer</code>s that provides
38: * the capability to receive <strong>DELAYED</strong> notification of
39: * state updates from the client. The delayed state notifications will
40: * be provided to the server when a state change occurs to a component
41: * which requires immediate notification. The delayed state notifications
42: * will be provided to the application before the immediate notification,
43: * though they will be processed in no particular order.
44: * This interface must be implemented by any component that creates
45: * "EchoPropertyUpdate" message parts on the client in a ClientMessage.
46: *
47: * @see nextapp.echo2.webcontainer.ActionProcessor
48: */
49: public interface PropertyUpdateProcessor {
50:
51: /**
52: * The attribute name of XML 'property' elements that specifies
53: * the name of the property.
54: */
55: public String PROPERTY_NAME = "name";
56:
57: /**
58: * The attribute name of XML 'property' elements that specifies
59: * the value of the property. Property elements may instead
60: * pass property data in child XML elements, and in such cases
61: * should not have a 'value' attribute.
62: */
63: public String PROPERTY_VALUE = "value";
64:
65: /**
66: * Notifies the <code>ComponentSynchronizePeer</code> that a client property
67: * update has occurred.
68: *
69: * @param ci the relevant <code>ContainerInstance</code>
70: * @param component the target <code>Component</code>
71: * @param propertyElement the XML element describing the property update
72: * (the name and value of the changed property may be obtained
73: * by querying the <code>PROPERTY_NAME</code> and
74: * <code>PROPERTY_VALUE</code> attribute values.
75: */
76: public void processPropertyUpdate(ContainerInstance ci,
77: Component component, Element propertyElement);
78: }
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