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


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
8  *
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10  * modification, are permitted provided that the following conditions
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13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
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28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
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34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
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.DbAttribute;
61 import org.objectstyle.cayenne.map.DbEntity;
62 import org.objectstyle.cayenne.map.DerivedDbAttribute;
63 import org.objectstyle.cayenne.map.DerivedDbEntity;
64 import org.objectstyle.cayenne.map.Entity;
65 import org.objectstyle.cayenne.map.ObjAttribute;
66 import org.objectstyle.cayenne.map.ObjEntity;
67 import org.objectstyle.cayenne.map.event.AttributeEvent;
68 import org.objectstyle.cayenne.modeler.Application;
69 import org.objectstyle.cayenne.modeler.ProjectController;
70 import org.objectstyle.cayenne.modeler.event.AttributeDisplayEvent;
71 import org.objectstyle.cayenne.modeler.util.CayenneAction;
72 import org.objectstyle.cayenne.project.NamedObjectFactory;
73 import org.objectstyle.cayenne.project.ProjectPath;
74
75 /**
76  * @author Andrei Adamchik
77  */
78 public class CreateAttributeAction extends CayenneAction {
79
80     public static String JavaDoc getActionName() {
81         return "Create Attribute";
82     }
83
84     /**
85      * Constructor for CreateAttributeAction.
86      * @param name
87      */
88     public CreateAttributeAction(Application application) {
89         super(getActionName(), application);
90     }
91
92     public String JavaDoc getIconName() {
93         return "icon-attribute.gif";
94     }
95
96     /**
97      * Creates ObjAttribute, DbAttribute depending on context.
98      */
99     public void performAction(ActionEvent JavaDoc e) {
100         if (getProjectController().getCurrentObjEntity() != null) {
101             createObjAttribute();
102         }
103         else if (getProjectController().getCurrentDbEntity() != null) {
104             createDbAttribute();
105         }
106     }
107
108     public void createObjAttribute() {
109         ProjectController mediator = getProjectController();
110         ObjEntity objEntity = mediator.getCurrentObjEntity();
111
112         ObjAttribute attr = (ObjAttribute) NamedObjectFactory.createObject(
113                 ObjAttribute.class,
114                 objEntity);
115         objEntity.addAttribute(attr);
116
117         mediator.fireObjAttributeEvent(new AttributeEvent(
118                 this,
119                 attr,
120                 objEntity,
121                 AttributeEvent.ADD));
122
123         AttributeDisplayEvent ade = new AttributeDisplayEvent(
124                 this,
125                 attr,
126                 objEntity,
127                 mediator.getCurrentDataMap(),
128                 mediator.getCurrentDataDomain());
129
130         mediator.fireObjAttributeDisplayEvent(ade);
131     }
132
133     public void createDbAttribute() {
134         Class JavaDoc attrClass = null;
135
136         DbEntity dbEntity = getProjectController().getCurrentDbEntity();
137         if (dbEntity instanceof DerivedDbEntity) {
138             if (((DerivedDbEntity) dbEntity).getParentEntity() == null) {
139                 return;
140             }
141             attrClass = DerivedDbAttribute.class;
142         }
143         else {
144             attrClass = DbAttribute.class;
145         }
146
147         DbAttribute attr =
148             (DbAttribute) NamedObjectFactory.createObject(attrClass, dbEntity);
149         dbEntity.addAttribute(attr);
150
151         ProjectController mediator = getProjectController();
152         mediator.fireDbAttributeEvent(
153             new AttributeEvent(this, attr, dbEntity, AttributeEvent.ADD));
154
155         AttributeDisplayEvent ade = new AttributeDisplayEvent(
156                 this,
157                 attr,
158                 dbEntity,
159                 mediator.getCurrentDataMap(),
160                 mediator.getCurrentDataDomain());
161
162         mediator.fireDbAttributeDisplayEvent(ade);
163     }
164
165     /**
166      * Returns <code>true</code> if path contains an Entity object.
167      */
168     public boolean enableForPath(ProjectPath path) {
169         if (path == null) {
170             return false;
171         }
172
173         return path.firstInstanceOf(Entity.class) != null;
174     }
175 }
176
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