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 * and Distribution License("CDDL") (collectively, the "License").  You
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 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package com.sun.messaging.jmq.jmsserver.persist.file;

import java.io.IOException;
import com.sun.messaging.jmq.jmsserver.data.BaseTransaction;
import com.sun.messaging.jmq.jmsserver.util.BrokerException;

public abstract class TransactionEvent {

	static public TransactionEvent createFromBytes(byte[] data)
			throws IOException, BrokerException {

		TransactionEvent result = null;
		byte type = data[0];
		byte subType = data[1];
		result = create(type, subType);
		result.readFromBytes(data);
		return result;
	}

	static TransactionEvent create(byte type, byte subtype) {
		TransactionEvent result = null;
		switch (type) {
		case BaseTransaction.LOCAL_TRANSACTION_TYPE:
			result = LocalTransactionEvent.create(subtype);
			break;
		case BaseTransaction.CLUSTER_TRANSACTION_TYPE:
			result = ClusterTransactionEvent.create(subtype);
			break;
		case BaseTransaction.REMOTE_TRANSACTION_TYPE:
			result = RemoteTransactionEvent.create(subtype);
			break;
		case BaseTransaction.NON_TRANSACTED_MSG_TYPE:
			result = NonTransactedMsgEvent.create(subtype);
			break;		
		case BaseTransaction.NON_TRANSACTED_ACK_TYPE:
			result = NonTransactedMsgAckEvent.create(subtype);
			break;		
		case BaseTransaction.MSG_REMOVAL_TYPE:
			result = MsgRemovalEvent.create(subtype);
			break;		
			

		default:
			throw new UnsupportedOperationException();
		}
		return result;
	}

	abstract int getType();

	abstract void readFromBytes(byte[] data) throws IOException,
			BrokerException;

	abstract byte[] writeToBytes() throws IOException, BrokerException;

}
