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package javax.servlet;


/**
 * Defines a general exception a servlet can throw when it
 * encounters difficulty.
 *
 * @author 	Various
 */


public class ServletException extends Exception {

    private Throwable rootCause;





    /**
     * Constructs a new servlet exception.
     *
     */

    public ServletException() {
	super();
    }
    
   

    

    /**
     * Constructs a new servlet exception with the
     * specified message. The message can be written 
     * to the server log and/or displayed for the user. 
     *
     * @param message 		a String 
     *				specifying the text of 
     *				the exception message
     *
     */

    public ServletException(String message) {
	super(message);
    }
    
   
   
    

    /**
     * Constructs a new servlet exception when the servlet 
     * needs to throw an exception and include a message 
     * about the "root cause" exception that interfered with its 
     * normal operation, including a description message.
     *
     *
     * @param message 		a String containing 
     *				the text of the exception message
     *
     * @param rootCause		the Throwable exception 
     *				that interfered with the servlet's
     *				normal operation, making this servlet
     *				exception necessary
     *
     */
    
    public ServletException(String message, Throwable rootCause) {
	super(message, rootCause);
	this.rootCause = rootCause;
    }





    /**
     * Constructs a new servlet exception when the servlet 
     * needs to throw an exception and include a message
     * about the "root cause" exception that interfered with its
     * normal operation.  The exception's message is based on the localized
     * message of the underlying exception.
     *
     * 

This method calls the getLocalizedMessage method * on the Throwable exception to get a localized exception * message. When subclassing ServletException, * this method can be overridden to create an exception message * designed for a specific locale. * * @param rootCause the Throwable exception * that interfered with the servlet's * normal operation, making the servlet exception * necessary * */ public ServletException(Throwable rootCause) { super(rootCause); this.rootCause = rootCause; } /** * Returns the exception that caused this servlet exception. * * * @return the Throwable * that caused this servlet exception * */ public Throwable getRootCause() { return rootCause; } }





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