transactionfactory.java

jdo开发实例,一个功能全面的oa系统

/**
 * <p>Title: transaction Factory</p>
 * <p>Description: transaction Factory for tran styled  operations, atomic operations. Ref Factory Pattern</p>
 * <p>Copyright: Copyright (c) 2002-2003</p>
 * <p>Company: RealMap</p>
 * @author: Mulder
 * @version 2003a
 */

package com.gzrealmap.oa.db;
import com.gzrealmap.*;
import com.gzrealmap.user.usergroup.*;
import com.gzrealmap.user.transactions.*;
public class transactionFactory
{

  /**
   每增加一个交易必须增加一个（transactionExample）子类，并且在tra实体，transAction
   registries中增加一个实体
   */
  /**
   @roseuid 3DD5CF2A00D4
   */
  //private transactionFactory();

  /**
   自动返回transactionExample或其他transactionExample1、transactionExample2等等
   @param tran
   @return com.gzrealmap.transaction
   @roseuid 3DD59E02014E
   */
  public static transaction getTransaction(String tran,String userID) throws Exception
  {
    if (!checkPermission(tran,userID))
      throw new Exception("Access denied! The user does not have sufficient privilege. ");
    String className
        = com.gzrealmap.user.transactions.Transactions.getFullTransactions().getTransactionByID(tran).getClassName();
    //String className = transactionProvider.lookup(tran);
    transaction tranInst = (transaction)Class.forName(className.trim()).newInstance();
    //tranInst.tranID = tran;
    return  tranInst;
  }

  /**
   *	Check if the specific user has adequate permissions, not well implemented. This method must be reimplement in version 2002a
   */
  public static boolean checkPermission(String tran,String userID) throws Exception
  {
    return true;
    //Comment out by Mulder, 2003/03/20, the transaction ACL control will be moved to common servlet filters
    /*
    System.out.println("tran:"+tran+"****************userid:"+userID);
    UserGroups ug = UserGroups.getFullUserGroups();

    return ug.able2Transaction(userID, tran);
    */
  }

  /**
   ** className is the full className, for example 'com.gzrealmap.transactionExample1'
   */
   /*
   public static transaction getTransactionByClassName(String className) throws Exception
   {
    transaction tranInst = (transaction)Class.forName(className).newInstance();
    return  tranInst;
   }
   */
}