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Java > Open Source Codes > org > netbeans > modules > j2ee > jpa > verification > common > Predicate


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.j2ee.jpa.verification.common;
21
22 /**
23  * This term is borrowed from propositional logic.
24  * It represents predicate part of "S is P" kind of preposition.
25  * In other words, it represents something that is affirmed or denied of the
26  * subject in a proposition in logic (taken from http://m-w.com).
27  * e.g. In the proposition <i>Foo.class is an entity class</i>
28  * Foo.class is the subject, the property of being an entity class is the predicate.
29  *
30  * @author Sanjeeb.Sahoo@Sun.COM
31  */
32 public interface Predicate {
33     /**
34      * Evaluate the predicate for this subject.
35      * @param subject for which this predicate will be evaluated
36      * @return true if the subject has this property, else false.
37      * It also returns false if the subject is not applicable to this predicate.
38      */
39     boolean evaluate(Object JavaDoc subject);
40 }
41
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