ftpexception.java

来自「JAVA FTP 上传下载 的源文件」· Java 代码 · 共 120 行

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.ftpserver.ftplet;

import java.io.PrintStream;
import java.io.PrintWriter;

/**
 * Ftplet exception class.
 *
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev: 711368 $, $Date: 2008-11-04 21:02:43 +0100 (Tue, 04 Nov 2008) $
 */
public class FtpException extends Exception {

    private static final long serialVersionUID = -1328383839915898987L;

    private Throwable throwable = null;

    /**
     * Default constructor.
     */
    public FtpException() {
        super();
    }

    /**
     * Constructs a <code>FtpException</code> object with a message.
     * 
     * @param msg
     *            a description of the exception
     */
    public FtpException(String msg) {
        super(msg);
    }

    /**
     * Constructs a <code>FtpException</code> object with a
     * <code>Throwable</code> cause.
     * 
     * @param th
     *            the original cause
     */
    public FtpException(Throwable th) {
        super(th.getMessage());
        throwable = th;
    }

    /**
     * Constructs a <code>BaseException</code> object with a
     * <code>Throwable</code> cause.
     * @param msg A description of the exception
     * 
     * @param th
     *            The original cause
     */
    public FtpException(String msg, Throwable th) {
        super(msg);
        throwable = th;
    }

    /**
     * Get the root cause.
     * @return The root cause
     */
    public Throwable getRootCause() {
        return throwable;
    }

    /**
     * Print stack trace.
     */
    public void printStackTrace(PrintWriter pw) {
        if (throwable == null) {
            super.printStackTrace(pw);
        } else {
            throwable.printStackTrace(pw);
        }
    }

    /**
     * Print stack trace.
     */
    public void printStackTrace(PrintStream ps) {
        if (throwable == null) {
            super.printStackTrace(ps);
        } else {
            throwable.printStackTrace(ps);
        }
    }

    /**
     * Print stack trace.
     */
    public void printStackTrace() {
        if (throwable == null) {
            super.printStackTrace();
        } else {
            throwable.printStackTrace();
        }
    }
}