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org/hibernate/transaction/TransactionFactoryFactory.java
package org.hibernate.transaction;

import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.hibernate.HibernateException;
import org.hibernate.cfg.Environment;
import org.hibernate.util.ReflectHelper;

/**
 @author Gavin King
 */
public final class TransactionFactoryFactory {

  private static final Log log = LogFactory.getLog(TransactionFactoryFactory.class);

  /**
   * Obtain a TransactionFactory with the transaction handling strategy
   * specified by the given Properties.
   *
   @param transactionProps transaction properties
   @return TransactionFactory
   @throws HibernateException
   */
  public static TransactionFactory buildTransactionFactory(Properties transactionPropsthrows HibernateException {

    String strategyClassName = transactionProps.getProperty(Environment.TRANSACTION_STRATEGY);
    if (strategyClassName==null) {
      log.info("Using default transaction strategy (direct JDBC transactions)");
      return new JDBCTransactionFactory();
    }
    log.info("Transaction strategy: " + strategyClassName);
    TransactionFactory factory;
    try {
      factory = (TransactionFactoryReflectHelper.classForName(strategyClassName).newInstance();
    }
    catch (ClassNotFoundException e) {
      log.error("TransactionFactory class not found", e);
      throw new HibernateException("TransactionFactory class not found: " + strategyClassName);
    }
    catch (IllegalAccessException e) {
      log.error("Failed to instantiate TransactionFactory", e);
      throw new HibernateException("Failed to instantiate TransactionFactory: " + e);
    }
    catch (java.lang.InstantiationException e) {
      log.error("Failed to instantiate TransactionFactory", e);
      throw new HibernateException("Failed to instantiate TransactionFactory: " + e);
    }
    factory.configure(transactionProps);
    return factory;
  }

  private TransactionFactoryFactory() {}
}