package org.apache.commons.ognl;

 /*

  * 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 java.util.Map;

 import java.util.Set;

 /**

  * Implementation of PropertyAccessor that uses numbers and dynamic subscripts as properties to index into Lists.

  * 

  * @author Luke Blanshard (blanshlu@netscape.net)

  * @author Drew Davidson (drew@ognl.org)

  */

 public class SetPropertyAccessor

     extends ObjectPropertyAccessor

     implements PropertyAccessor // This is here to make javadoc show this class as an implementor

 {

     @Override

     public Object getProperty( Map<String, Object> context, Object target, Object name )

         throws OgnlException

     {

         Set<?> set = (Set<?>) target; // check performed by the invoker

         if ( name instanceof String )

         {

             Object result;

             if ( "size".equals( name ) )

             {

                 result = set.size();

             }

             else if ( "iterator".equals( name ) )

             {

                 result = set.iterator();

             }

             else if ( "isEmpty".equals( name ) )

             {

                 result = set.isEmpty() ? Boolean.TRUE : Boolean.FALSE;

             }

             else

             {

                 result = super.getProperty( context, target, name );

             }

             return result;

         }

         throw new NoSuchPropertyException( target, name );

     }

 }