001 package org.apache.commons.ognl; 002 003 /* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022 import java.util.Map; 023 import java.util.Set; 024 025 /** 026 * Implementation of PropertyAccessor that uses numbers and dynamic subscripts as properties to index into Lists. 027 * 028 * @author Luke Blanshard (blanshlu@netscape.net) 029 * @author Drew Davidson (drew@ognl.org) 030 */ 031 public class SetPropertyAccessor 032 extends ObjectPropertyAccessor 033 implements PropertyAccessor // This is here to make javadoc show this class as an implementor 034 { 035 036 @Override 037 public Object getProperty( Map<String, Object> context, Object target, Object name ) 038 throws OgnlException 039 { 040 Set<?> set = (Set<?>) target; // check performed by the invoker 041 042 if ( name instanceof String ) 043 { 044 Object result; 045 046 if ( "size".equals( name ) ) 047 { 048 result = set.size(); 049 } 050 else if ( "iterator".equals( name ) ) 051 { 052 result = set.iterator(); 053 } 054 else if ( "isEmpty".equals( name ) ) 055 { 056 result = set.isEmpty() ? Boolean.TRUE : Boolean.FALSE; 057 } 058 else 059 { 060 result = super.getProperty( context, target, name ); 061 } 062 return result; 063 } 064 065 throw new NoSuchPropertyException( target, name ); 066 } 067 068 }