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Java > Open Source Codes > org > netbeans > modules > xml > xsd > XSDGrammarQueryProvider


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.xsd;
21
22 import java.beans.FeatureDescriptor JavaDoc;
23 import java.util.Enumeration JavaDoc;
24 import java.util.WeakHashMap JavaDoc;
25 import org.netbeans.modules.xml.api.model.*;
26
27 /**
28  * Provide XSD grammar. It must be registered at layer.
29  *
30  * @author Ales Novak <ales.novak@sun.com>
31  */
32 public class XSDGrammarQueryProvider extends GrammarQueryManager {
33
34     private static final WeakHashMap JavaDoc schemas = new WeakHashMap JavaDoc();
35  
36     public XSDGrammarQueryProvider() {
37     }
38     
39     public Enumeration JavaDoc enabled(GrammarEnvironment ctx) {
40         
41         if (ctx.getFileObject() == null) {
42             return null;
43         }
44         
45         XSDGrammarResolver ret = XSDGrammarResolver.createResolver(ctx);
46         if (ret != null) {
47             // remember this schema
48 schemas.put(ctx.getFileObject(), ret);
49             return org.openide.util.Enumerations.singleton (ret.getTarget());
50         }
51         
52     return null;
53     }
54     
55     public FeatureDescriptor JavaDoc getDescriptor() {
56         return new FeatureDescriptor JavaDoc();
57     }
58     
59     public GrammarQuery getGrammar(GrammarEnvironment env) {
60         return (XSDGrammarResolver) schemas.remove(env.getFileObject());
61     }
62 }
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