MachineModelFactory.java

/*
  MachineModelFactory.java

  (c) 2010-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.server;

import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import v9t9.common.machine.IMachineModel;

/**
 * @author ejs
 *
 */
public class MachineModelFactory {

	public static final MachineModelFactory INSTANCE = new MachineModelFactory();
	
	private Map<String, Class<? extends IMachineModel>> classMap = new HashMap<String, Class<? extends IMachineModel>>();

	private String defaultModel;

	public void register(String id, Class<? extends IMachineModel> klass) {
		assert !classMap.containsKey(id);
		classMap.put(id, klass);
		if (defaultModel == null)
			defaultModel = id;
	}
	
	public IMachineModel createModel(String id) {
		Class<? extends IMachineModel> klass = classMap.get(id);
		if (klass == null)
			return null;
		try {
			return klass.newInstance();
		} catch (InstantiationException e) {
			assert false : e.getMessage();
		} catch (IllegalAccessException e) {
			assert false : e.getMessage();
		}
		return null;
	}

	public Collection<String> getRegisteredModels() {
		return Collections.unmodifiableCollection(classMap.keySet());
	}

	public void setDefaultModel(String defaultModel) {
		this.defaultModel = defaultModel;
	}
	public String getDefaultModel() {
		return defaultModel;
	}
	
}