package org.apache.maven.shared.transfer.dependencies.collect.internal;
   
   /*
    * 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.
   */
  
  import org.apache.maven.shared.transfer.dependencies.collect.DependencyCollectorException;
  
  import java.lang.reflect.InvocationTargetException;
  
  /**
   * Invokes method on objects using reflection.
   */
  final class Invoker
  {
      private Invoker()
      {
          // do not instantiate
      }
  
      public static <T> T invoke( Object object, String method ) throws DependencyCollectorException
      {
          try
          {
              @SuppressWarnings( "unchecked" )
              T invoke = (T) object.getClass().getMethod( method ).invoke( object );
              return invoke;
          }
          catch ( IllegalAccessException | InvocationTargetException | NoSuchMethodException e )
          {
              throw new DependencyCollectorException( e.getMessage(), e );
          }
      }
  
      public static <T> T invoke( Class<?> objectClazz, String staticMethod, Class<?> argClazz, Object arg )
              throws DependencyCollectorException
      {
          try
          {
              @SuppressWarnings( "unchecked" )
              T invoke = (T) objectClazz.getMethod( staticMethod, argClazz ).invoke( null, arg );
              return invoke;
          }
          catch ( IllegalAccessException | InvocationTargetException | NoSuchMethodException e )
          {
              throw new DependencyCollectorException( e.getMessage(), e );
          }
      }
  
      /**
       * @param objectClazz  the class of the static method
       * @param staticMethod the static method to call
       * @param argClasses   the classes of the argument, used to select the right static method
       * @param args         the actual arguments to be passed
       * @return the result of the method invocation
       * @throws DependencyCollectorException if any checked exception occurs
       */
      public static <T> T invoke( Class<?> objectClazz, String staticMethod, Class<?>[] argClasses, Object[] args )
              throws DependencyCollectorException
      {
          if ( args.length != argClasses.length )
          {
              throw new IllegalArgumentException( "The number of elements in argClasses and args are not the same." );
          }
  
          try
          {
              @SuppressWarnings( "unchecked" )
              T invoke = (T) objectClazz.getMethod( staticMethod, argClasses ).invoke( null, args );
              return invoke;
          }
          catch ( IllegalAccessException | InvocationTargetException | NoSuchMethodException e )
          {
              throw new DependencyCollectorException( e.getMessage(), e );
          }
      }
  
  }