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Java > Open Source Codes > org > objectstyle > cayenne > project > DataNodeFile


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  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
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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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21  * 3. The end-user documentation included with the redistribution, if any,
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.
27  *
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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41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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48  * SUCH DAMAGE.
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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.project;
57
58 import java.io.PrintWriter JavaDoc;
59
60 import org.objectstyle.cayenne.access.DataNode;
61 import org.objectstyle.cayenne.conf.ConfigSaver;
62 import org.objectstyle.cayenne.conf.DriverDataSourceFactory;
63
64 /**
65  * DataNodeFile is a ProjectFile abstraction of the
66  * DataNode file in a Cayenne project.
67  *
68  * @author Andrei Adamchik
69  */
70 public class DataNodeFile extends ProjectFile {
71     public static final String JavaDoc LOCATION_SUFFIX = ".driver.xml";
72
73     protected DataNode nodeObj;
74
75     public DataNodeFile() {}
76
77     /**
78      * Constructor for DataNodeFile.
79      */
80     public DataNodeFile(Project project, DataNode node) {
81         super(project, node.getDataSourceLocation());
82         this.nodeObj = node;
83     }
84
85     /**
86      * @see ProjectFile#getObject()
87      */
88     public Object JavaDoc getObject() {
89         return nodeObj;
90     }
91
92     /**
93      * @see ProjectFile#getObjectName()
94      */
95     public String JavaDoc getObjectName() {
96         return nodeObj.getName();
97     }
98
99     public void save(PrintWriter JavaDoc out) throws Exception JavaDoc {
100         ProjectDataSource src = (ProjectDataSource) nodeObj.getDataSource();
101         new ConfigSaver().storeDataNode(out, src.getDataSourceInfo());
102     }
103
104     /**
105      * @see org.objectstyle.cayenne.project.ProjectFile#canHandle(Object)
106      */
107     public boolean canHandle(Object JavaDoc obj) {
108         if (obj instanceof DataNode) {
109             DataNode node = (DataNode) obj;
110
111             // only driver datasource factory requires a file
112 if (DriverDataSourceFactory
113                 .class
114                 .getName()
115                 .equals(node.getDataSourceFactory())) {
116                 return true;
117             }
118         }
119
120         return false;
121     }
122
123     /**
124      * Updates node location to match the name before save.
125      */
126     public void willSave() {
127         super.willSave();
128
129         if (nodeObj != null && canHandle(nodeObj)) {
130             nodeObj.setDataSourceLocation(getLocation());
131         }
132     }
133
134     /**
135      * Returns ".driver.xml" that should be used as a file suffix
136      * for DataNode driver files.
137      */
138     public String JavaDoc getLocationSuffix() {
139         return LOCATION_SUFFIX;
140     }
141 }
142
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