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Cayenne Object Persistence Framework
/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.project;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
import org.apache.cayenne.conf.ConfigStatus;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.map.MapLoader;
import org.xml.sax.InputSource;
/**
* Cayenne project that consists of a single DataMap.
*
* @author Andrei Adamchik
*/
public class DataMapProject extends Project {
private static Logger logObj = Logger.getLogger(DataMapProject.class);
protected DataMap map;
/**
* Constructor for MapProject.
*
* @param projectFile
*/
public DataMapProject(File projectFile) {
super(projectFile);
}
/**
* @since 1.1
*/
public void upgrade() throws ProjectException {
// upgrades not supported in this type of project
throw new ProjectException("'DataMapProject' does not support upgrades.");
}
/**
* Does nothing.
*/
public void checkForUpgrades() {
// do nothing
}
/**
* Initializes internal map
object and then calls super.
*/
protected void postInitialize(File projectFile) {
if (projectFile != null) {
try {
InputStream in = new FileInputStream(projectFile.getCanonicalFile());
map = new MapLoader().loadDataMap(new InputSource(in));
String fileName = resolveSymbolicName(projectFile);
logObj.error("resolving: " + projectFile + " to " + fileName);
String mapName = (fileName != null && fileName
.endsWith(DataMapFile.LOCATION_SUFFIX))
? fileName.substring(0, fileName.length()
- DataMapFile.LOCATION_SUFFIX.length())
: "UntitledMap";
map.setName(mapName);
}
catch (Exception dme) {
throw new ProjectException(
"Error creating " + this.getClass().getName(),
dme);
}
}
else {
map = (DataMap) NamedObjectFactory.createObject(DataMap.class, null);
}
super.postInitialize(projectFile);
}
/**
* Returns a list that contains project DataMap as a single object.
*/
public List getChildren() {
List entities = new ArrayList();
entities.add(map);
return entities;
}
/**
* Returns appropriate ProjectFile or null if object does not require a file of its
* own. In case of DataMapProject, the only object that requires a file is the project
* itself.
*/
public ProjectFile projectFileForObject(Object obj) {
if (obj == this) {
return new DataMapFile(this, map);
}
return null;
}
/**
* Always returns empty status. Map projects do not support status tracking yet.
*/
public ConfigStatus getLoadStatus() {
return new ConfigStatus();
}
}
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