package com.adito.security;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.adito.jdbc.JDBCSystemDatabase;
/**
* System database factory for creating system databases.
*/
public class SystemDatabaseFactory {
static Log log = LogFactory.getLog(SystemDatabaseFactory.class);
static SystemDatabase instance;
static Class systemDatabaseImpl = JDBCSystemDatabase.class;
private static boolean locked = false;
/**
* @return An instance of the system database factory.
*/
public static SystemDatabase getInstance() {
try {
return instance == null ? instance = (SystemDatabase) systemDatabaseImpl.newInstance() : instance;
} catch (Exception e) {
log.error("Could not create instance of class " + systemDatabaseImpl.getCanonicalName(), e);
return instance == null ? instance = new JDBCSystemDatabase() : instance;
}
}
/**
* @param systemDatabaseImpl the class of the system database
* @param lock weather to lock the system database after setting it.
* @throws IllegalStateException
*/
public static void setFactoryImpl(Class systemDatabaseImpl, boolean lock) throws IllegalStateException {
if (locked) {
throw new IllegalStateException("System database factory has been locked by another plugin.");
}
SystemDatabaseFactory.systemDatabaseImpl = systemDatabaseImpl;
locked = lock;
}
}