/* ===========================================================
* TradeManager : An application to trade strategies for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2011-2011, by Simon Allen and Contributors.
*
* Project Info: org.trade
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Oracle, Inc.
* in the United States and other countries.]
*
* (C) Copyright 2011-2011, by Simon Allen and Contributors.
*
* Original Author: Simon Allen;
* Contributor(s): -;
*
* Changes
* -------
*
*/
package org.trade.core.lookup;
import java.util.Vector;
/**
* @author Simon Allen
*/
public class LookupService {
//
// Private Attributes
//
private static Vector<LookupServiceProvider> _providers = new Vector<LookupServiceProvider>();
static {
addLookupServiceProvider(new PropertyFileLookupServiceProvider());
addLookupServiceProvider(new DBTableLookupServiceProvider());
}
/**
* Get the appropriate Lookup.
*
* @param lookupName
* String
* @param qualifier
* LookupQualifier
* @param optional
* boolean
* @return Lookup
* @exception LookupException
*/
public static Lookup getLookup(String lookupName, LookupQualifier qualifier, boolean optional)
throws LookupException {
Lookup lookup = null;
// Loop through the registered providers and find and try to find one
// that can provide the lookup
int providersSize = _providers.size();
for (int i = 0; i < providersSize; i++) {
lookup = _providers.elementAt(i).getLookup(lookupName, qualifier, optional);
if (null != lookup) {
// Have found a Lookup - don't care if another provider can
// provide it or not
break;
}
}
return lookup;
}
/**
* Method addLookupServiceProvider.
*
* @param provider
* LookupServiceProvider
*/
public static void addLookupServiceProvider(LookupServiceProvider provider) {
if (!_providers.contains(provider)) {
_providers.addElement(provider);
}
}
/**
* Method removeLookupServiceProvider.
*
* @param provider
* LookupServiceProvider
*/
public static void removeLookupServiceProvider(LookupServiceProvider provider) {
_providers.removeElement(provider);
}
}