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Java > Open Source Codes > org > netbeans > modules > j2ee > persistence > api > PersistenceLocation


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.persistence.api;
21
22 import java.io.IOException JavaDoc;
23 import org.netbeans.api.project.Project;
24 import org.netbeans.modules.j2ee.persistence.spi.PersistenceLocationProvider;
25 import org.openide.filesystems.FileObject;
26
27 /**
28  * This class allows retrieving the default persistence location in a project
29  * or creating this location if it doesn't exist.
30  *
31  * @author Andrei Badea
32  */
33 public final class PersistenceLocation {
34
35     private PersistenceLocation() {
36     }
37
38     /**
39      * Returns the default persistence location in the given project.
40      *
41      * @param project the project.
42      * @return the persistence location or null if the project does not have
43      * a persistence location or the location does not exist.
44      */
45     public static FileObject getLocation(Project project) {
46         PersistenceLocationProvider provider = (PersistenceLocationProvider)project.getLookup().lookup(PersistenceLocationProvider.class);
47         if (provider != null) {
48             return provider.getLocation();
49         }
50         return null;
51     }
52
53     /**
54      * Creates the default persistence location in the given project.
55      *
56      * @param project the project.
57      * @return the persistence location; never null.
58      * @throws IOException if the persistence location could not be created
59      * or the project did not have an implementation of
60      * PersistenceLocationProvider in its lookup.
61      */
62     public static FileObject createLocation(Project project) throws IOException JavaDoc {
63         PersistenceLocationProvider provider = (PersistenceLocationProvider)project.getLookup().lookup(PersistenceLocationProvider.class);
64         if (provider != null) {
65             return provider.createLocation();
66         }
67         throw new IOException JavaDoc("The project " + project + " does not have an implementation of PersistenceLocationProvider in its lookup"); // NOI18N
68 }
69 }
70
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