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Java > Open Source Codes > org > objectstyle > cayenne > modeler > action > DbEntitySyncAction


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
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6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
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54  * <http://objectstyle.org/>.
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56 package org.objectstyle.cayenne.modeler.action;
57
58 import java.awt.event.ActionEvent JavaDoc;
59 import java.util.Collection JavaDoc;
60
61 import org.objectstyle.cayenne.map.DataMap;
62 import org.objectstyle.cayenne.map.DbEntity;
63 import org.objectstyle.cayenne.map.event.EntityEvent;
64 import org.objectstyle.cayenne.modeler.Application;
65 import org.objectstyle.cayenne.modeler.ProjectController;
66 import org.objectstyle.cayenne.modeler.util.CayenneAction;
67 import org.objectstyle.cayenne.project.ProjectPath;
68 import org.objectstyle.cayenne.util.EntityMergeSupport;
69
70 /**
71  * Action that synchronizes all ObjEntities with the current state of the
72  * selected DbEntity.
73  *
74  * @author Garry Watkins
75  */
76 public class DbEntitySyncAction extends CayenneAction {
77
78     public static String JavaDoc getActionName() {
79         return "Sync Dependent ObjEntities with DbEntity";
80     }
81
82     public DbEntitySyncAction(Application application) {
83         super(getActionName(), application);
84     }
85
86     public String JavaDoc getIconName() {
87         return "icon-sync.gif";
88     }
89
90     /**
91      * @see org.objectstyle.cayenne.modeler.util.CayenneAction#performAction(ActionEvent)
92      */
93     public void performAction(ActionEvent JavaDoc e) {
94         synchDbEntity();
95     }
96
97     protected void synchDbEntity() {
98         ProjectController mediator = getProjectController();
99         DataMap map = mediator.getCurrentDataMap();
100         DbEntity ent = mediator.getCurrentDbEntity();
101
102         if (map != null && ent != null) {
103             EntityMergeSupport merger = new EntityMergeSupport(map);
104             Collection JavaDoc objEntities = map.getMappedEntities(ent);
105             merger.synchronizeWithDbEntities(objEntities);
106             
107             // fire a chain of "remove/add" events for entity
108 // this seems to be the only way to refresh the view
109 mediator.fireObjEntityEvent(
110                 new EntityEvent(this, ent, EntityEvent.REMOVE));
111
112             mediator.fireObjEntityEvent(
113                 new EntityEvent(this, ent, EntityEvent.ADD));
114         }
115     }
116     
117     /**
118      * Returns <code>true</code> if path contains a ObjEntity object.
119      */
120     public boolean enableForPath(ProjectPath path) {
121         if (path == null) {
122             return false;
123         }
124
125         return path.firstInstanceOf(DbEntity.class) != null;
126     }
127 }
128
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