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Java > Open Source Codes > org > enhydra > apache > xerces > validators > schema > identity > FieldActivator


1 /*
2  * The Apache Software License, Version 1.1
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4  *
5  * Copyright (c) 2001 The Apache Software Foundation.
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10  * are met:
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13  * notice, this list of conditions and the following disclaimer.
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20  * 3. The end-user documentation included with the redistribution,
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22  * "This product includes software developed by the
23  * Apache Software Foundation (http://www.apache.org/)."
24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
26  *
27  * 4. The names "Xerces" and "Apache Software Foundation" must
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32  * 5. Products derived from this software may not be called "Apache",
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50  * This software consists of voluntary contributions made by many
51  * individuals on behalf of the Apache Software Foundation and was
52  * originally based on software copyright (c) 1999, International
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56  */
57
58 package org.enhydra.apache.xerces.validators.schema.identity;
59
60
61 /**
62  * Interface for a field activator. The field activator is responsible
63  * for activating fields within a specific scope; the caller merely
64  * requests the fields to be activated.
65  *
66  * @author Andy Clark, IBM
67  *
68  * @version $Id: FieldActivator.java,v 1.2 2005/01/26 08:28:45 jkjome Exp $
69  */
70 public interface FieldActivator {
71     
72     //
73 // FieldActivator methods
74 //
75
76     /**
77      * Start the value scope for the specified identity constraint. This
78      * method is called when the selector matches in order to initialize
79      * the value store.
80      *
81      * @param identityConstraint The identity constraint.
82      */
83     public void startValueScopeFor(IdentityConstraint identityConstraint)
84         throws Exception JavaDoc;
85
86     /**
87      * Request to activate the specified field. This method returns the
88      * matcher for the field.
89      * It's also important for the implementor to ensure that the Field realizes that
90      * it is permitted to match a value--that is, to call the field's setMayMatch(boolean) method.
91      *
92      * @param field The field to activate.
93      */
94     public XPathMatcher activateField(Field field) throws Exception JavaDoc;
95
96     /**
97      * Ends the value scope for the specified identity constraint.
98      *
99      * @param identityConstraint The identity constraint.
100      */
101     public void endValueScopeFor(IdentityConstraint identityConstraint)
102         throws Exception JavaDoc;
103
104 } // interface FieldActivator
105
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