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package org.apache.naming;

import java.util.Hashtable;
import javax.naming.Reference;
import javax.naming.Context;
import javax.naming.StringRefAddr;

/**
 * Represents a reference address to a transaction.
 *
 * @author Remy Maucherat
 * @version $Revision: 1.2 $ $Date: 2005/12/08 01:29:05 $
 */

public class TransactionRef
    extends Reference {


    // -------------------------------------------------------------- Constants


    /**
     * Default factory for this reference.
     */
    public static final String DEFAULT_FACTORY = 
        org.apache.naming.factory.Constants.DEFAULT_TRANSACTION_FACTORY;


    // ----------------------------------------------------------- Constructors


    /**
     * Resource Reference.
     */
    public TransactionRef() {
        this(null, null);
    }


    /**
     * Resource Reference.
     * 
     * @param factory the factory
     * @param factoryLocation the factory location 
     */
    public TransactionRef(String factory, String factoryLocation) {
        super("javax.transaction.UserTransaction", factory, factoryLocation);
    }


    // ----------------------------------------------------- Instance Variables


    // ------------------------------------------------------ Reference Methods


    /**
     * Retrieves the class name of the factory of the object to which this 
     * reference refers.
     */
    public String getFactoryClassName() {
        String factory = super.getFactoryClassName();
        if (factory != null) {
            return factory;
        } else {
            factory = System.getProperty(Context.OBJECT_FACTORIES);
            if (factory != null) {
                return null;
            } else {
                return DEFAULT_FACTORY;
            }
        }
    }


    // ------------------------------------------------------------- Properties


}