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


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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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.access.DataDomain;
61 import org.objectstyle.cayenne.access.DataNode;
62 import org.objectstyle.cayenne.conf.DriverDataSourceFactory;
63 import org.objectstyle.cayenne.conn.DataSourceInfo;
64 import org.objectstyle.cayenne.map.event.DataNodeEvent;
65 import org.objectstyle.cayenne.modeler.Application;
66 import org.objectstyle.cayenne.modeler.ProjectController;
67 import org.objectstyle.cayenne.modeler.event.DataNodeDisplayEvent;
68 import org.objectstyle.cayenne.modeler.util.CayenneAction;
69 import org.objectstyle.cayenne.project.NamedObjectFactory;
70 import org.objectstyle.cayenne.project.ProjectDataSource;
71 import org.objectstyle.cayenne.project.ProjectPath;
72
73 /**
74  * @author Andrei Adamchik
75  */
76 public class CreateNodeAction extends CayenneAction {
77
78     public static String JavaDoc getActionName() {
79         return "Create DataNode";
80     }
81
82     /**
83      * Constructor for CreateNodeAction.
84      *
85      * @param name
86      */
87     public CreateNodeAction(Application application) {
88         super(getActionName(), application);
89     }
90
91     public String JavaDoc getIconName() {
92         return "icon-node.gif";
93     }
94
95     /**
96      * @see org.objectstyle.cayenne.modeler.util.CayenneAction#performAction(ActionEvent)
97      */
98     public void performAction(ActionEvent JavaDoc e) {
99         createDataNode();
100     }
101
102     /**
103      * Creates a new DataNode, notifying listeners of this event.
104      */
105     protected DataNode createDataNode() {
106         ProjectController mediator = getProjectController();
107         DataDomain domain = mediator.getCurrentDataDomain();
108
109         // use domain name as DataNode base, as node names must be unique across the
110 // project...
111 DataNode node = buildDataNode();
112         mediator.fireDataNodeEvent(new DataNodeEvent(this, node, DataNodeEvent.ADD));
113         mediator.fireDataNodeDisplayEvent(new DataNodeDisplayEvent(this, domain, node));
114
115         return node;
116     }
117
118     /**
119      * Creates a new DataNode, adding to the current domain, but doesn't send any events.
120      */
121     protected DataNode buildDataNode() {
122         ProjectController mediator = getProjectController();
123         DataDomain domain = mediator.getCurrentDataDomain();
124
125         // use domain name as DataNode base, as node names must be unique across the
126 // project...
127 DataNode node = (DataNode) NamedObjectFactory.createObject(
128                 DataNode.class,
129                 domain,
130                 domain.getName() + "Node");
131         ProjectDataSource src = new ProjectDataSource(new DataSourceInfo());
132         node.setDataSource(src);
133
134         // by default create JDBC Node
135 node.setDataSourceFactory(DriverDataSourceFactory.class.getName());
136
137         domain.addNode(node);
138         return node;
139     }
140
141     /**
142      * Returns <code>true</code> if path contains a DataDomain object.
143      */
144     public boolean enableForPath(ProjectPath path) {
145         if (path == null) {
146             return false;
147         }
148
149         return path.firstInstanceOf(DataDomain.class) != null;
150     }
151 }
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