clientcardbean.java

我在加拿大学习的一个比较复杂的在线银行程序.

package com.ebusiness.ebank.ejb.entitybean;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: eBusiness Inc., All right reserved</p>
 * @author unascribed
 * @version 1.0
 */

import java.sql.Timestamp;
import javax.ejb.EntityBean;
import javax.ejb.CreateException;
import javax.ejb.EJBException;
import javax.ejb.EntityContext;

import com.ebusiness.ebank.exception.BusinessException;
import com.ebusiness.ebank.exception.SystemException;
import com.ebusiness.ebank.exception.ErrorMessages;
import com.ebusiness.ebank.bean.ClientCardValue;

abstract public class ClientCardBean implements EntityBean
{
    private EntityContext ctx;

    private static final String INSERT = "I";
    private static final String UPDATE = "U";
    private static final String DELETE = "D";

    //Bean attribute accessor
    abstract public Long getObjectID();
    abstract public void setObjectID(Long oid);
    abstract public String getClientCardID();
    abstract public void setClientCardID(String clientCardID);
    abstract public String getPassword();
    abstract public void setPassword(String password);
    abstract public String getWebPassword();
    abstract public void setWebPassword(String webPassword);
    abstract public String getIssueNo();
    abstract public void setIssueNo(String issueNo);
    abstract public long getCardholderOID();
    abstract public void setCardholderOID(long oid);

    abstract public Timestamp getEffectiveDate();
    abstract public void setEffectiveDate(Timestamp effectiveDate);
    abstract public Timestamp getExpiryDate();
    abstract public void setExpiryDate(Timestamp expiryDate);

    abstract public String getCreateUserID();
    abstract public void setCreateUserID(String createUserID);
    abstract public Timestamp getCreateDate();
    abstract public void setCreateDate(Timestamp createDate);
    abstract public String getUpdateUserID();
    abstract public void setUpdateUserID(String updateUserID);
    abstract public Timestamp getUpdateDate();
    abstract public void setUpdateDate(Timestamp expiryDate);
    abstract public String getAction();
    abstract public void setAction(String action);

    // Business methods

    /**
     * Parse the entity bean value to ClientCardValue object
     *
     * @return ClientCardValue
     */
    public ClientCardValue getValueObject()
    {
        ClientCardValue value = new ClientCardValue(this.getObjectID().longValue());

        value.setClientCardID(this.getClientCardID());
        value.setPassword(this.getPassword());
        value.setWebPassword(this.getWebPassword());
        value.setIssueNo(this.getIssueNo());

        value.setCardholderOID(this.getCardholderOID());

        //common values
        value.setEffectiveDate(this.getEffectiveDate());
        value.setExpiryDate(this.getExpiryDate());
        value.setCreateUserID(this.getCreateUserID());
        value.setCreateDate(this.getCreateDate());
        value.setUpdateUserID(this.getUpdateUserID());
        value.setUpdateDate(this.getUpdateDate());
        value.setAction(this.getAction());
        return value;
    }

    public ClientCardValue ChangePW(String newPassword, boolean changeWebPW)
    {
        if (changeWebPW)
           this.setWebPassword(newPassword);
        else
           this.setPassword(newPassword);
        this.setUpdateUserID(this.ctx.getCallerPrincipal().getName());
        return this.getValueObject();
    }

    /**
     * @todo: Update Client card info. This is used to renew a client's card
     *
     * @param value :    ClientCardValue
     * @return      :    updated ClientCardValue
     */
    public ClientCardValue update(ClientCardValue value)
    {
        this.setClientCardID(value.getClientCardID());
        this.setIssueNo(value.getIssueNo());
        this.setPassword(value.getPassword());
        this.setUpdateUserID(this.ctx.getCallerPrincipal().getName());
        return this.getValueObject();
    }

    // Framework and lifecycle methods

    /**
     * This method will insert a record to the ClientCard table.
     * The method should be called within Cardholder Entity Bean since the ClientCard
     * must have a valid cardholder
     */
    public Long ejbCreate(ClientCardValue value)
         throws CreateException
    {
        this.setClientCardID(value.getClientCardID());
        this.setPassword(value.getPassword());
        this.setWebPassword(value.getWebPassword());
        this.setIssueNo(value.getIssueNo());

        this.setCardholderOID(value.getCardholderOID());

        //common values
        this.setEffectiveDate(value.getEffectiveDate());
        this.setExpiryDate(value.getExpiryDate());
        String userID = this.ctx.getCallerPrincipal().getName();
        this.setCreateUserID(userID);
        this.setUpdateUserID(userID);

        return null; //for container managed persistence
    }

    public void ejbPostCreate(ClientCardValue value) throws CreateException {}

    public void ejbActivate() {}

    public void ejbLoad() {}

    public void ejbPassivate() {}

    public void ejbRemove() //this method will delete the record from database
    {
        this.setUpdateUserID(this.ctx.getCallerPrincipal().getName());
        this.setAction(this.DELETE);
    }

    public void ejbStore() {}

    public void setEntityContext(EntityContext ctx)
    {
        this.ctx = ctx;
    }

    public void unsetEntityContext()
    {
        this.ctx = null;
    }
}