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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;
}
}