com.crankuptheamps.client.ProtocolFactory Maven / Gradle / Ivy
////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2010-2021 60East Technologies Inc., All Rights Reserved.
//
// This computer software is owned by 60East Technologies Inc. and is
// protected by U.S. copyright laws and other laws and by international
// treaties. This computer software is furnished by 60East Technologies
// Inc. pursuant to a written license agreement and may be used, copied,
// transmitted, and stored only in accordance with the terms of such
// license agreement and with the inclusion of the above copyright notice.
// This computer software or any other copies thereof may not be provided
// or otherwise made available to any other person.
//
// U.S. Government Restricted Rights. This computer software: (a) was
// developed at private expense and is in all respects the proprietary
// information of 60East Technologies Inc.; (b) was not developed with
// government funds; (c) is a trade secret of 60East Technologies Inc.
// for all purposes of the Freedom of Information Act; and (d) is a
// commercial item and thus, pursuant to Section 12.212 of the Federal
// Acquisition Regulations (FAR) and DFAR Supplement Section 227.7202,
// Government's use, duplication or disclosure of the computer software
// is subject to the restrictions set forth by 60East Technologies Inc..
//
////////////////////////////////////////////////////////////////////////////
package com.crankuptheamps.client;
import java.lang.reflect.Constructor;
import java.util.Hashtable;
import java.util.Properties;
import com.crankuptheamps.client.exception.ProtocolException;
/**
* Class which creates Protocols as well as registering and unregistering them from a Java Map.
*/
public class ProtocolFactory
{
private static Hashtable registry= new Hashtable();
static
{
registry.put("amps", "com.crankuptheamps.client.JSONProtocol");
}
/**
* Method to register the name of the message and the message type.
* @param name A string containing the name of the message
* @param msgType A string containing the type of the message
* @throws ProtocolException The name is already registered
*/
public static void register( String name, String msgType) throws ProtocolException
{
if (!registry.containsKey(name) )
{
registry.put(name, msgType);
}
else
{
throw new ProtocolException("'" + name + "' is already registred.");
}
}
/**
* Method to unregister a message.
* @param name A string containing the name of the message.
* @throws ProtocolException the provided name is not registered
*/
public static void unregister(String name) throws ProtocolException
{
if(registry.containsKey(name))
{
registry.remove(name);
}
else
{
throw new ProtocolException("'" + name
+ "' is not a known Protocol, can not unregister.");
}
}
/**
* Creates a protocol.
* @param name A string which holds the name of the Protocol
* @param props A Properties object which holds the properties of the Protocol
* @throws ProtocolException provided name is not a valid Protocol
* @return Returns this instance so that various operations can be chained together.
*/
public static Protocol createProtocol(
String name,
Properties props) throws ProtocolException
{
// Guess at the protocol name
String mtName = "com.crankuptheamps.client." + name.toUpperCase() + "Protocol";
if(registry.containsKey(name))
{
mtName = registry.get(name);
}
try
{
Class c = Class.forName(mtName);
Constructor ctor = c.getConstructor(Properties.class);
return (Protocol) ctor.newInstance(props);
}
catch (Exception e)
{
throw new ProtocolException("'" + name + "' is not a valid Protocol.", e);
}
}
}