businessexception.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.exception;

/**
 * <p>Title: </p>
 * <p>Description: All of the business problem such as data error, business validation
 *                  failure etc can throw this exception</p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: eBusiness Inc., All right reserved</p>
 * @author unascribed
 * @version 1.0
 */

import java.util.Map;
import java.util.Locale;

public class BusinessException extends BaseException
{
    private Map messages; //Hold all messages for different languages

    //Construct a BusinessException with message key and exception
    public BusinessException(String messageKey, Exception e)
    {
        super(messageKey, e);

        //set messages to the exception
        this.messages = ErrorMessages.getMessages(messageKey);
    }

    //Construct a BusinessExcetion with exception only
    public BusinessException(Exception e)
    {
        this("", e);
    }

    //Construct a BusinessExcetion with message key only
    public BusinessException(String messageKey)
    {
        this(messageKey, null);
    }

    //Return default error message
    public String getMessage()
    {
        return (String)messages.get("en"); //Default error message is English message
    }

    //Return error message based on the specified languageCode
    public String getMessage(String languageCode)
    {
        return (String)messages.get(languageCode);
    }

    //Return error message based on the specified Locale
    public String getMessage(Locale locale)
    {
        return (String)messages.get(locale.getLanguage());
    }

    //Return error message key
    public String getMessageKey()
    {
        return super.getMessage();
    }
}