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Java > Open Source Codes > org > netbeans > modules > j2ee > sun > validation > constraints > NonZeroLengthConstraint


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 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.j2ee.sun.validation.constraints;
21
22 import java.util.ArrayList JavaDoc;
23 import java.util.Collection JavaDoc;
24
25 import org.netbeans.modules.j2ee.sun.validation.constraints.ConstraintFailure;
26 import org.netbeans.modules.j2ee.sun.validation.util.BundleReader;
27
28 /**
29  * NonZeroLengthConstraint is a {@link Constraint} to validate non zero
30  * length value. It implements <code>Constraint</code> interface and extends
31  * {@link ConstraintUtils} class.
32  * <code>match</code> method of this object returns empty
33  * <code>Collection</code> if the value being validated is of non zero length;
34  * else it returns a <code>Collection</code> with a {@link ConstraintFailure}
35  * object in it.
36  * <code>ConstraintUtils</code> class provides utility methods for formating
37  * failure messages and a <code>print<method> method to print this object.
38  *
39  * @author Rajeshwar Patil
40  * @version %I%, %G%
41  */
42 public class NonZeroLengthConstraint extends ConstraintUtils
43                 implements Constraint {
44     
45     /** Creates a new instance of
46      * <code>NonZeroLengthConstraintConstraint</code>.
47      */
48     public NonZeroLengthConstraint() {
49     }
50
51
52     /**
53      * Validates the given value against this <code>Constraint</code>.
54      *
55      * @param value the value to be validated.
56      * @param name the element name, value of which is being validated.
57      * It is used only in case of <code>Constraint</code> failure, to construct
58      * the failure message.
59      *
60      * @return <code>Collection</code> the Collection of
61      * <code>ConstraintFailure</code> Objects. Collection is empty if
62      * there are no failures. Failure can occur if value being validated
63      * is of zero length.
64      */
65     public Collection JavaDoc match(String JavaDoc value, String JavaDoc name) {
66         Collection JavaDoc failed_constrained_list = new ArrayList JavaDoc();
67         if (value != null){
68             if(value.length() == 0){
69                 String JavaDoc failureMessage = formatFailureMessage(toString(), name);
70                 failed_constrained_list.add(new ConstraintFailure(toString(),
71                     value, name, failureMessage, BundleReader.getValue(
72                         "MSG_NonZeroLengthConstraint_Failure"))); //NOI18N
73 }
74         }
75         return failed_constrained_list;
76     }
77 }
78
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