nntpexception.java

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package org.apache.james.nntpserver;

/**
 * Exception Wrapper, like javax.servlet.ServletException.
 * Purpose is to catch and wrap exceptions into unchecked NNTP specific. 
 * Protocol handler catches the exception and returns error info to client.
 * Error Information is obtained by calling 'getMessage'
 *
 */
public class NNTPException extends RuntimeException {

    /**
     * The encapsulated Throwable
     */
    private final Throwable t;

    /**
     * Create an NNTPException with an error message and no
     * encapsulated <code>Throwable</code>
     *
     * @param msg the error message for this exception
     */
    public NNTPException(String msg) {
        super(msg);
        this.t = null;
    }

    /**
     * Create an NNTPException with an error message and an
     * encapsulated <code>Throwable</code>
     *
     * @param msg the error message for this exception
     * @param t the encapsulated <code>Throwable</code>
     */
    public NNTPException(String msg,Throwable t) {
        super(msg+((t!=null)?": "+t.toString():""));
        this.t = t;
    }

    /**
     * Create an NNTPException with an
     * encapsulated <code>Throwable</code>
     *
     * @param t the encapsulated <code>Throwable</code>
     */
    public NNTPException(Throwable t) {
        super(t.toString());
        this.t = t;
    }
}