/*
    * 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.maven.plugin;
  
  import java.util.Iterator;
  import java.util.List;
  
  import org.apache.maven.plugin.descriptor.MojoDescriptor;
  import org.apache.maven.plugin.descriptor.PluginDescriptor;
  
  /**
   * MojoNotFoundException
   */
  public class MojoNotFoundException extends Exception {
      private String goal;
  
      private PluginDescriptor pluginDescriptor;
  
      public MojoNotFoundException(String goal, PluginDescriptor pluginDescriptor) {
          super(toMessage(goal, pluginDescriptor));
  
          this.goal = goal;
          this.pluginDescriptor = pluginDescriptor;
      }
  
      public String getGoal() {
          return goal;
      }
  
      public PluginDescriptor getPluginDescriptor() {
          return pluginDescriptor;
      }
  
      private static String toMessage(String goal, PluginDescriptor pluginDescriptor) {
          StringBuilder buffer = new StringBuilder(256);
  
          buffer.append("Could not find goal '").append(goal).append('\'');
  
          if (pluginDescriptor != null) {
              buffer.append(" in plugin ").append(pluginDescriptor.getId());
  
              buffer.append(" among available goals ");
              List<MojoDescriptor> mojos = pluginDescriptor.getMojos();
              if (mojos != null) {
                  for (Iterator<MojoDescriptor> it = mojos.iterator(); it.hasNext(); ) {
                      MojoDescriptor mojo = it.next();
                      if (mojo != null) {
                          buffer.append(mojo.getGoal());
                      }
                      if (it.hasNext()) {
                          buffer.append(", ");
                      }
                  }
              }
          }
  
          return buffer.toString();
      }
  }