/*
* (c) Copyright 2010-2011 AgileBirds
*
* This file is part of OpenFlexo.
*
* OpenFlexo is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenFlexo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
*
*/
package org.openflexo.dataimporter;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class DataImporterLoader {
private static final Logger logger = Logger.getLogger(DataImporterLoader.class.getPackage().getName());
/*public static final String RATIONAL_ROSE_IMPORTER = "org.openflexo.rationalrose.Importer";
public static final String WSDL_IMPORTER = "org.openflexo.wsdl.Importer";*/
public enum KnownDataImporter {
WSDL_IMPORTER {
@Override
public String getClassName() {
return "org.openflexo.wsdl.Importer";
}
},
RATIONAL_ROSE_IMPORTER {
@Override
public String getClassName() {
return "org.openflexo.rationalrose.Importer";
}
};
public abstract String getClassName();
public boolean isAvailable() {
return DataImporterLoader.getDataImporter(getClassName()) != null;
}
public DataImporter getImporter() {
return DataImporterLoader.getDataImporter(getClassName());
}
}
private static final Hashtable<String, DataImporter> _dataImporter = new Hashtable<String, DataImporter>();
/**
* Return supplied data importer, or null if such a data importer was not found
*
* @param aDataImporter
* @return
*/
public static DataImporter getDataImporter(String aDataImporter) {
return getAllDataImporter().get(aDataImporter);
}
/**
* Return all DataImporter instances
*
* @return a Hashtable of DataImporter instances
*/
public static Hashtable<String, DataImporter> getAllDataImporter() {
if (_dataImporter.size() == 0) {
loadAllDataImporter();
}
return _dataImporter;
}
/**
* Internnaly used to load data importers
*/
private static void loadAllDataImporter() {
for (int i = 0; i < KnownDataImporter.values().length; i++) {
KnownDataImporter candidate = KnownDataImporter.values()[i];
try {
Class<?> importer = Class.forName(candidate.getClassName());
Object dataImporter = importer.newInstance();
if (dataImporter instanceof DataImporter) {
_dataImporter.put(candidate.getClassName(), (DataImporter) dataImporter);
} else {
if (logger.isLoggable(Level.WARNING)) {
logger.warning("Data importer :" + candidate
+ " cannot be loaded because it doesn't implements org.openflexo.dataimporter.DataImporter.");
}
}
} catch (Exception e) {
if (logger.isLoggable(Level.WARNING) && !candidate.equals(KnownDataImporter.RATIONAL_ROSE_IMPORTER)) {
logger.warning("Data importer :" + candidate + " cannot be loaded.\n\t\t" + e.getMessage());
if (logger.isLoggable(Level.FINE)) {
e.printStackTrace();
}
}
} catch (Error e) {
if (logger.isLoggable(Level.SEVERE)) {
logger.severe("An error has occured while trying to load " + candidate.getClassName());
}
e.printStackTrace();
}
}
}
}