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


1 /* ====================================================================
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56
57 package org.objectstyle.cayenne.modeler.action;
58
59 import java.awt.event.ActionEvent JavaDoc;
60
61 import org.objectstyle.cayenne.map.Relationship;
62 import org.objectstyle.cayenne.modeler.Application;
63 import org.objectstyle.cayenne.project.ProjectPath;
64
65 /**
66  * Removes currently selected relationship from either the DbEntity or ObjEntity.
67  *
68  * @author Garry Watkins
69  */
70 public class RemoveRelationshipAction extends RemoveAction {
71     private final static String JavaDoc ACTION_NAME = "Remove Relationship";
72     
73     public static String JavaDoc getActionName() {
74         return ACTION_NAME;
75     }
76
77     public RemoveRelationshipAction(Application application) {
78         super(ACTION_NAME, application);
79     }
80     
81     /**
82      * Returns <code>true</code> if last object in the path contains a removable relationship.
83      */
84     public boolean enableForPath(ProjectPath path) {
85         if (path == null) {
86             return false;
87         }
88         Object JavaDoc lastObject = path.getObject();
89
90         return lastObject instanceof Relationship;
91     }
92     
93     public void performAction(ActionEvent JavaDoc e) {
94         if (getProjectController().getCurrentObjRelationship() != null) {
95             removeObjRelationship();
96         }
97         else if (getProjectController().getCurrentDbRelationship() != null) {
98             removeDbRelationship();
99         }
100     }
101 }
102
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