001package org.apache.maven.lifecycle;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022/**
023 * Signals a failure to locate a lifecycle.
024 * 
025 * @author Benjamin Bentmann
026 */
027public class LifecycleNotFoundException
028    extends Exception
029{
030
031    private final String lifecycleId;
032
033    /**
034     * Creates a new exception to indicate that the specified lifecycle is unknown.
035     * 
036     * @param lifecycleId The identifier of the lifecycle that could not be located, may be {@code null}.
037     */
038    public LifecycleNotFoundException( String lifecycleId )
039    {
040        super( "Unknown lifecycle " + lifecycleId );
041        this.lifecycleId = ( lifecycleId != null ) ? lifecycleId : "";
042    }
043
044    /**
045     * Gets the identifier of the lifecycle that was not found.
046     * 
047     * @return The identifier of the lifecycle that was not found, never {@code null}.
048     */
049    public String getLifecycleId()
050    {
051        return lifecycleId;
052    }
053
054}