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


1 /*
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5  * Copyright (c) 2001 The Apache Software Foundation.
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24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
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27  * 4. The names "Xerces" and "Apache Software Foundation" must
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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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