SolutionsCatalog


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.blueprints.catalog;
21  
22  import java.io.IOException  ;
23  import java.io.InputStream  ;
24  import javax.xml.parsers.ParserConfigurationException  ;
25  import org.netbeans.modules.j2ee.blueprints.catalog.bpcatalogxmlparser.Nbcatalog;
26  import org.xml.sax.SAXException  ;
27  
28  /**
29   * Singleton for accessing the solutions catalog.
30   *
31   * @author Mark Roth
32   */
33  public class SolutionsCatalog {
34  
35      private static SolutionsCatalog theInstance = null;
36      
37      private static final String   NBCATALOG =
38          "/org/netbeans/modules/j2ee/blueprints/nbcatalog.xml"; // NOI18N
39          
40      /** Parsed representation of nbcatalog.xml */
41      private Nbcatalog nbcatalogXml = null;
42          
43      /** Private Singleton constructor */
44      private SolutionsCatalog() {}
45  
46      public static SolutionsCatalog getInstance() {
47          if(theInstance == null) {
48              createInstance();
49          }
50          return theInstance;
51      }
52      
53      private synchronized static void createInstance() {
54          if(theInstance == null) {
55              theInstance = new SolutionsCatalog();
56          }
57      }
58      
59      public Nbcatalog getCatalogXml() {
60          if(this.nbcatalogXml == null){
61              parseCatalogXml(NBCATALOG);
62          }    
63          return this.nbcatalogXml;
64      }
65      
66      public Nbcatalog getCurrentNbcatalogXml() {
67          parseCatalogXml(NBCATALOG);
68          return nbcatalogXml;
69      }
70      
71      private synchronized void parseCatalogXml(String   catalogFile) {
72              this.nbcatalogXml = new Nbcatalog();
73              try {
74                  InputStream   in = getClass().getResourceAsStream(catalogFile);
75                  this.nbcatalogXml = Nbcatalog.read(in);
76                  in.close();
77              }
78              catch(ParserConfigurationException   e) {
79                  throw new RuntimeException  (e);
80              }
81              catch(SAXException   e) {
82                  throw new RuntimeException  (e);
83              }
84              catch(IOException   e) {
85                  throw new RuntimeException  (e);
86              }
87      }
88  }
89
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