package org.apache.commons.beanutils2;
   
   /*
    * 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 static org.apache.commons.beanutils2.Assertions.checkArgument;
  
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  
  final class DefaultIndexedPropertyGetterAccessor<B>
      implements IndexedPropertyGetterAccessor<B>
  {
  
      private final B bean;
  
      private final String propertyName;
  
      private final Method indexedReadMethod;
  
      public DefaultIndexedPropertyGetterAccessor( B bean, String propertyName, Method indexedReadMethod )
      {
          this.bean = bean;
          this.propertyName = propertyName;
          this.indexedReadMethod = indexedReadMethod;
      }
  
      /**
       * {@inheritDoc}
       */
      public BeanAccessor<?> at( int index )
      {
          checkArgument( index >= 0, "Indexed property '%s' in bean of type %s cannot be get from a negative index %s",
                         propertyName, bean.getClass().getName(), index );
          Object indexedValue = invokeGetter( index );
          return new DefaultBeanAccessor<Object>( indexedValue );
      }
  
      private Object invokeGetter( int index )
      {
          try
          {
              return indexedReadMethod.invoke( bean, index );
          }
          catch ( IllegalAccessException e )
          {
              throw new PropertyGetterNotAccessibleException( propertyName, indexedReadMethod.getName(), bean.getClass(), e );
          }
          catch ( InvocationTargetException e )
          {
              throw new PropertyGetterInvocationException( propertyName, indexedReadMethod.getName(), bean.getClass(), e );
          }
      }
  
  }