/*
 * 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.geode.modules.session.installer.args;

/**
 * Invalid usage exception.
 */
public class UsageException extends Exception {

  /**
   * Serial format version.
   */
  private static final long serialVersionUID = 1L;

  /**
   * Stored usage message.
   */
  private String usage;

  /**
   * Creates a new UsageException.
   *
   * @param message description of exceptional condition
   */
  public UsageException(final String message) {
    super(message);
  }

  /**
   * Attaches a usage message to the exception for later consumption.
   *
   * @param usageText text to display to user to guide them to correct usage. This is generated and
   *        set by the <code>ArgsProcessor</code>.
   */
  public void setUsage(final String usageText) {
    usage = usageText;
  }

  /**
   * Returns the usage message previously set.
   *
   * @return message or null if not set.
   */
  public String getUsage() {
    return usage;
  }
}
