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Java > Open Source Codes > org > netbeans > modules > xml > schema > model > visitor > FindReferredConstraintVisitor


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.xml.schema.model.visitor;
21
22 import java.util.Collection JavaDoc;
23 import org.netbeans.modules.xml.schema.model.Constraint;
24 import org.netbeans.modules.xml.schema.model.GlobalElement;
25 import org.netbeans.modules.xml.schema.model.LocalElement;
26 import org.netbeans.modules.xml.schema.model.SchemaComponent;
27
28 /**
29  *
30  * @author rico
31  * Visitor that searches schema elements for a key or unique.
32  * This is used by KeyRef to look for keys or unique that
33  * it refers to in its "refer" attribute.
34  */
35 public class FindReferredConstraintVisitor extends DeepSchemaVisitor{
36     
37     private Constraint constraint;
38     private String JavaDoc name;
39     private boolean found;
40     
41     /**
42      * Creates a new instance of FindReferredConstraintVisitor
43      */
44     public FindReferredConstraintVisitor() {
45     }
46     
47     /**
48      * Recursively searches from parent for the Constraint (unique or key) that
49      * has the same name as the name parameter.
50      * @param parent Node where searching will start.
51      * @param name name of Constraint to look for
52      */
53     public Constraint findReferredConstraint(SchemaComponent parent, String JavaDoc name){
54         this.name = name;
55         found = false;
56         parent.accept(this);
57         return constraint;
58     }
59     
60     public void visit(LocalElement le) {
61         if(findConstraint(le.getConstraints())){
62             return;
63         }
64         super.visit(le);
65     }
66     
67     public void visit(GlobalElement ge) {
68         if(findConstraint(ge.getConstraints())){
69             return;
70         }
71         super.visit(ge);
72     }
73     
74     protected void visitChildren(SchemaComponent sc) {
75         for (SchemaComponent child: sc.getChildren()) {
76             child.accept(this);
77             if(found) return;
78         }
79     }
80     
81     private boolean findConstraint(Collection JavaDoc<Constraint> constraints){
82         for(Constraint c : constraints){
83             if(c.getName().equals(name)){
84                 constraint = c;
85                 found = true;
86                 return true;
87             }
88         }
89         return false;
90     }
91 }
92
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