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Java > Open Source Codes > org > netbeans > modules > xml > retriever > catalog > model > CatalogModelFactory


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 package org.netbeans.modules.xml.retriever.catalog.model;
20
21 import java.io.IOException JavaDoc;
22 import javax.swing.text.BadLocationException JavaDoc;
23 import javax.swing.text.Document JavaDoc;
24 import org.netbeans.modules.xml.xam.AbstractModelFactory;
25 import org.netbeans.modules.xml.xam.ModelSource;
26 import org.netbeans.modules.xml.retriever.catalog.model.impl.CatalogModelImpl;
27
28 public class CatalogModelFactory extends AbstractModelFactory<CatalogModel> {
29     /**
30      * Creates a new instance of CatalogModelFactory
31      */
32     private CatalogModelFactory() {
33     }
34     
35     private static CatalogModelFactory instance = new CatalogModelFactory();
36     
37     public static CatalogModelFactory getInstance() {
38         return instance;
39     }
40     
41     protected CatalogModel createModel(ModelSource source) {
42         return new CatalogModelImpl(source);
43     }
44     
45     public static final String JavaDoc CATALOG_TEMPLATE = "<?xml version=\"1.0\" encoding=\"UTF-8\""
46             +" standalone=\"no\"?>"+"\n"+
47             "<catalog xmlns=\"urn:oasis:names:tc:entity:xmlns:xml:catalog\" prefer=\"system\"/>";
48     
49     public CatalogModel getModel(ModelSource source) {
50         Document JavaDoc doc = (Document JavaDoc) source.getLookup().lookup(Document JavaDoc.class);
51         if( (doc != null) && doc.getLength() <= 5){
52             //means the catalog file is empty now
53 try {
54                 doc.remove(0, doc.getLength());
55                 doc.insertString(0, CATALOG_TEMPLATE, null);
56             } catch (BadLocationException JavaDoc ex) {
57                 return null;
58             }
59         }
60         
61         CatalogModel cm =(CatalogModel) super.getModel(source);
62         try {
63             cm.sync();
64         } catch (IOException JavaDoc ex) {
65         }
66         return cm;
67     }
68 }
69
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