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 java.lang.String.format;
  
  import java.beans.IntrospectionException;
  import java.util.Map;
  
  final class NullBeanAccessor<B>
      implements BeanAccessor<B>
  {
  
      private final String errorMessage;
  
      public NullBeanAccessor( String beanTypeName, String methodName )
      {
          errorMessage = format( "%s.%s returned null!", beanTypeName, methodName );
      }
  
      /**
       * {@inheritDoc}
       */
      public BeanAccessor<?> get( String propertyName )
      {
          throw new NullPointerException( errorMessage );
      }
  
      /**
       * {@inheritDoc}
       */
      public IndexedPropertyGetterAccessor<?> getIndexed( String propertyName )
      {
          throw new NullPointerException( errorMessage );
      }
  
      /**
       * {@inheritDoc}
       */
      public MappedPropertyGetterAccessor getMapped( String propertyName )
      {
          throw new NullPointerException( errorMessage );
      }
  
      /**
       * {@inheritDoc}
       */
      public B get()
      {
          return null;
      }
  
      /**
       * {@inheritDoc}
       */
      public <V> V cast()
      {
          return null;
      }
  
      /**
       * {@inheritDoc}
       */
      public BeanPropertySetter<B> set( String propertyName )
      {
          throw new NullPointerException( errorMessage );
      }
  
      /**
       * {@inheritDoc}
       */
      public IndexedPropertySetterAccessor<B> setIndexed( String propertyName )
      {
          throw new NullPointerException( errorMessage );
      }
  
      /**
       * {@inheritDoc}
       */
      public MappedPropertySetterAccessor<B> setMapped( String propertyName )
      {
          throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public boolean isReadable( String propertyName )
         throws IntrospectionException
     {
         throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public boolean isWritable( String propertyName )
         throws IntrospectionException
     {
         throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public B cloneBean()
     {
         return null;
     }
 
     /**
      * {@inheritDoc}
      */
     public <T extends B> void copyPropertiesTo( T target )
     {
         throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public Map<String, Object> describe()
     {
         throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public void populate( Map<String, Object> properties )
     {
         throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public ArgumentsAccessor invoke( String methodName )
     {
         throw new NullPointerException( errorMessage );
     }
 
     /**
      * {@inheritDoc}
      */
     public ArgumentsAccessor invokeExact( String methodName )
     {
         throw new NullPointerException( errorMessage );
     }
 
 }