Source Code Cross Referenced for DataObjectProvider.java in  » IDE-Netbeans » etl.project » org » netbeans » modules » etl » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » etl.project » org.netbeans.modules.etl.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         *                 Sun Public License Notice
03:         * 
04:         * The contents of this file are subject to the Sun Public License
05:         * Version 1.0 (the "License"). You may not use this file except in
06:         * compliance with the License. A copy of the License is available at
07:         * http://www.sun.com/
08:         * 
09:         * The Original Code is NetBeans. The Initial Developer of the Original
10:         * Code is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
11:         * Microsystems, Inc. All Rights Reserved.
12:
13:        If you wish your version of this file to be governed by only the CDDL
14:        or only the GPL Version 2, indicate your decision by adding
15:        "[Contributor] elects to include this software in this distribution
16:        under the [CDDL or GPL Version 2] license." If you do not indicate a
17:        single choice of license, a recipient has the option to distribute
18:        your version of this file under either the CDDL, the GPL Version 2 or
19:        to extend the choice of license to its licensees as provided above.
20:        However, if you add GPL Version 2 code and therefore, elected the GPL
21:        Version 2 license, then the option applies only if the new code is
22:        made subject to such option by the copyright holder.
23:
24:        If you wish your version of this file to be governed by only the CDDL
25:        or only the GPL Version 2, indicate your decision by adding
26:        "[Contributor] elects to include this software in this distribution
27:        under the [CDDL or GPL Version 2] license." If you do not indicate a
28:        single choice of license, a recipient has the option to distribute
29:        your version of this file under either the CDDL, the GPL Version 2 or
30:        to extend the choice of license to its licensees as provided above.
31:        However, if you add GPL Version 2 code and therefore, elected the GPL
32:        Version 2 license, then the option applies only if the new code is
33:        made subject to such option by the copyright holder.
34:         */
35:
36:        package org.netbeans.modules.etl.ui;
37:
38:        import org.openide.loaders.DataObject;
39:        import org.openide.util.Lookup;
40:        import org.openide.windows.TopComponent;
41:
42:        /**
43:         * This Class uses the Lookup to find the data object corresponding
44:         * to the active top component.
45:         * @author ks161616
46:         */
47:        public class DataObjectProvider {
48:
49:            /* singleton instance of the top component provider */
50:            private static DataObjectProvider instance;
51:
52:            public static ETLDataObject activeDataObject;
53:
54:            /**
55:             * Creates a new instance of DataObjectProvider
56:             */
57:            private DataObjectProvider() {
58:            }
59:
60:            /**
61:             * Gets the singleton instance of the provider.
62:             *    
63:             */
64:            public static DataObjectProvider getProvider() {
65:                if (instance == null) {
66:                    instance = new DataObjectProvider();
67:                }
68:                return instance;
69:            }
70:
71:            /**
72:             * Gets the active ETL data object.
73:             *
74:             */
75:            public ETLDataObject getActiveDataObject() {
76:                Object obj = TopComponent.getRegistry().getActivated()
77:                        .getLookup().lookup(DataObject.class);
78:                if (obj instanceof  ETLDataObject) {
79:                    activeDataObject = (ETLDataObject) obj;
80:                }
81:                // If no active data object is found, returns the previously active data object.
82:                // check if any other ways exists to do this.
83:                return activeDataObject;
84:            }
85:        }
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