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


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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10  * modification, are permitted provided that the following conditions
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24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
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26  * if and wherever such third-party acknowlegements normally appear.
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53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56 package org.objectstyle.cayenne.modeler.action;
57
58 import java.awt.event.ActionEvent JavaDoc;
59
60 import org.objectstyle.cayenne.map.DbEntity;
61 import org.objectstyle.cayenne.map.DbRelationship;
62 import org.objectstyle.cayenne.map.Entity;
63 import org.objectstyle.cayenne.map.ObjEntity;
64 import org.objectstyle.cayenne.map.ObjRelationship;
65 import org.objectstyle.cayenne.map.event.RelationshipEvent;
66 import org.objectstyle.cayenne.modeler.Application;
67 import org.objectstyle.cayenne.modeler.ProjectController;
68 import org.objectstyle.cayenne.modeler.event.RelationshipDisplayEvent;
69 import org.objectstyle.cayenne.modeler.util.CayenneAction;
70 import org.objectstyle.cayenne.project.NamedObjectFactory;
71 import org.objectstyle.cayenne.project.ProjectPath;
72
73 /**
74  * @author Andrei Adamchik
75  */
76 public class CreateRelationshipAction extends CayenneAction {
77
78     public static String JavaDoc getActionName() {
79         return "Create Relationship";
80     }
81
82     /**
83      * Constructor for CreateRelationshipAction.
84      */
85     public CreateRelationshipAction(Application application) {
86         super(getActionName(), application);
87     }
88
89     public String JavaDoc getIconName() {
90         return "icon-relationship.gif";
91     }
92
93     /**
94      * @see org.objectstyle.cayenne.modeler.util.CayenneAction#performAction(ActionEvent)
95      */
96     public void performAction(ActionEvent JavaDoc e) {
97         ObjEntity objEnt = getProjectController().getCurrentObjEntity();
98         if (objEnt != null) {
99             createObjRelationship(objEnt);
100         } else {
101             DbEntity dbEnt = getProjectController().getCurrentDbEntity();
102             if (dbEnt != null) {
103                 createDbRelationship(dbEnt);
104             }
105         }
106     }
107
108     public void createObjRelationship(ObjEntity objEnt) {
109         ProjectController mediator = getProjectController();
110
111         ObjRelationship rel =
112             (ObjRelationship) NamedObjectFactory.createObject(
113                 ObjRelationship.class,
114                 objEnt);
115         rel.setSourceEntity(objEnt);
116         objEnt.addRelationship(rel);
117
118         mediator.fireObjRelationshipEvent(
119             new RelationshipEvent(this, rel, objEnt, RelationshipEvent.ADD));
120         
121         RelationshipDisplayEvent rde = new RelationshipDisplayEvent(
122                 this,
123                 rel,
124                 objEnt,
125                 mediator.getCurrentDataMap(),
126                 mediator.getCurrentDataDomain());
127         
128         mediator.fireObjRelationshipDisplayEvent(rde);
129     }
130
131     public void createDbRelationship(DbEntity dbEnt) {
132         ProjectController mediator = getProjectController();
133
134         DbRelationship rel =
135             (DbRelationship) NamedObjectFactory.createObject(DbRelationship.class, dbEnt);
136
137         rel.setSourceEntity(dbEnt);
138         dbEnt.addRelationship(rel);
139
140         mediator.fireDbRelationshipEvent(
141             new RelationshipEvent(this, rel, dbEnt, RelationshipEvent.ADD));
142
143         RelationshipDisplayEvent rde = new RelationshipDisplayEvent(
144                 this,
145                 rel,
146                 dbEnt,
147                 mediator.getCurrentDataMap(),
148                 mediator.getCurrentDataDomain());
149         
150         mediator.fireDbRelationshipDisplayEvent(rde);
151     }
152
153     /**
154     * Returns <code>true</code> if path contains an Entity object.
155     */
156     public boolean enableForPath(ProjectPath path) {
157         if (path == null) {
158             return false;
159         }
160
161         return path.firstInstanceOf(Entity.class) != null;
162     }
163 }
164
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