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package com.sun.enterprise.connectors;

import javax.resource.spi.XATerminator;
import javax.transaction.xa.Xid;
import javax.transaction.xa.XAException;
import java.io.Externalizable;
import java.io.ObjectOutput;
import java.io.IOException;
import java.io.ObjectInput;

/**
 * Proxy for XATerminator.

 * This implementation is Serializable(Externalizable) such that RAR implementation
 * can use it safely in Serialization mandated scenarios

 *
 * @author Jagadish Ramu
 */
public class XATerminatorProxy implements XATerminator, Externalizable {

    private transient XATerminator xat;

    /**
     * Provides a proxy for XATerminator
     * @param xat Actual XATerminator
     */
    public XATerminatorProxy(XATerminator xat){
        this.xat = xat;
    }

    /**
     * Provides a proxy for XATerminator

     * no-args constructor for de-serialization
     */
    public XATerminatorProxy(){
    }

    /**
     * @see javax.resource.spi.XATerminator
     */
    public void commit(Xid xid, boolean onePhase) throws XAException {
        xat.commit(xid, onePhase);
    }

    /**
     * @see javax.resource.spi.XATerminator
     */
    public void forget(Xid xid) throws XAException {
        xat.forget(xid);
    }

    /**
     * @see javax.resource.spi.XATerminator
     */
    public int prepare(Xid xid) throws XAException {
        return xat.prepare(xid);
    }

    /**
     * @see javax.resource.spi.XATerminator
     */
    public Xid[] recover(int flag) throws XAException {
        return xat.recover(flag);
    }

    /**
     * @see javax.resource.spi.XATerminator
     */
    public void rollback(Xid xid) throws XAException {
        xat.rollback(xid);
    }

    /**
     * @see java.io.Externalizable
     */
    public void writeExternal(ObjectOutput out) throws IOException {
        //do nothing
    }

    /**
     * @see java.io.Externalizable
     */
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        xat = ConnectorRuntime.getRuntime().getTransactionManager().getXATerminator();
    }
}