package org.wamblee.system;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

public class DefaultServiceRegistry implements ServiceRegistry {

	private int _count;
	private Map<String, Service> _services;

	public DefaultServiceRegistry() {
		_count = 0;
		_services = new HashMap<String, Service>();
	}

	@Override
	public synchronized Service register(ServiceDescriptor aDescriptor,
			Object aService) {
		_count++;
		String id = "" + _count;
		Service svc = new DefaultService(id, aDescriptor, aService);
		_services.put(id, svc);
		return svc;
	}
	
	@Override
	public void remove(Service aService) {
		Service svc = _services.remove(aService.getId());
		if ( svc == null ) { 
			throw new IllegalArgumentException("Service '" + aService.getId() + "' does not exist");
		}
	}

	@Override
	public synchronized Service find(String id) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public Service[] listAllServices() {
		return new ArrayList<Service>(_services.values())
				.toArray(new Service[0]);
	}
}