karaf-2.2.x/shell/console/src/main/java/org/apache/felix/gogo/commands/CommandException.java

/*
 * 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.felix.gogo.commands;

import org.fusesource.jansi.Ansi;

/**
 * Base class for exceptions thrown when executing commands.
 */
public class CommandException extends Exception {

    private String help;

    public CommandException() {
    }

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

    public CommandException(String message, Throwable cause) {
        super(message, cause);
    }

    public CommandException(Throwable cause) {
        super(cause);
    }

    public CommandException(String help, String message) {
        super(message);
        this.help = help;
    }

    public CommandException(String help, String message, Throwable cause) {
        super(message, cause);
        this.help = help;
    }

    public String getNiceHelp() {
        return  help != null ? help
                    : Ansi.ansi()
                        .fg(Ansi.Color.RED)
                        .a("Error executing command: ")
                        .a(getMessage() != null ? getMessage() : getClass().getName())
                        .fg(Ansi.Color.DEFAULT).toString();
    }

}