Source Code Cross Referenced for ElementChildTrigger.java in  » Web-Framework » rife-1.6.1 » com » uwyn » rife » engine » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » rife 1.6.1 » com.uwyn.rife.engine 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright 2001-2007 Geert Bevin <gbevin[remove] at uwyn dot com>
03:         * Distributed under the terms of either:
04:         * - the common development and distribution license (CDDL), v1.0; or
05:         * - the GNU Lesser General Public License, v2.1 or later
06:         * $Id: ElementChildTrigger.java 3634 2007-01-08 21:42:24Z gbevin $
07:         */
08:        package com.uwyn.rife.engine;
09:
10:        /**
11:         * This interface contains all the methods that a class must implement to be
12:         * able to handle child trigger events.
13:         * <p>Child triggers are setup in the site structure to drill down an element
14:         * inheritance hierarchy according to value changes in inputs or cookies. This
15:         * will happen both when values are sent by a client and when values are set
16:         * by an element.
17:         * <p>By registering an instance of a <code>ElementChildTrigger</code> class,
18:         * it's possible to only allow the child to be activated according to certain
19:         * conditions. This can for instance be used to validate an authentication
20:         * session identifier, and only allow the child activation if the identifier
21:         * is valid and not expired.
22:         * 
23:         * @author Geert Bevin (gbevin[remove] at uwyn dot com)
24:         * @version $Revision: 3634 $
25:         * @see ElementSupport#setChildTrigger
26:         * @since 1.0
27:         */
28:        public interface ElementChildTrigger {
29:            /**
30:             * This method will be called when a child trigger instance is registered
31:             * and a value is provided for an input or cookie that is setup as a child
32:             * trigger.
33:             * <p>You are not allowed to access any information of the element context
34:             * state besides the name and values of the child trigger variable. These
35:             * are provided to you as method arguments. If you do try to access other
36:             * state information, the engine will throw a {@link
37:             * com.uwyn.rife.engine.exceptions.RequestAccessDeniedException}
38:             * exception. This is needed to be able to record all the child triggers
39:             * that occurred. The engine uses this information to replay child
40:             * triggers automatically during subsequent requests and access a child
41:             * element directly if all child triggers are still successful.
42:             * 
43:             * @param name the name of the child trigger variable
44:             * @param values the values of the child trigger variable
45:             * @return <code>true</code> if the child element can be executed; or
46:             * <p><code>false</code> if the logic should continue in the element that
47:             * activated the child trigger
48:             * @since 1.0
49:             */
50:            public boolean childTriggered(String name, String[] values);
51:        }
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