1 package org.apache.commons.ognl; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import java.util.Map; 23 import java.util.Set; 24 25 /** 26 * Implementation of PropertyAccessor that uses numbers and dynamic subscripts as properties to index into Lists. 27 * 28 * @author Luke Blanshard (blanshlu@netscape.net) 29 * @author Drew Davidson (drew@ognl.org) 30 */ 31 public class SetPropertyAccessor 32 extends ObjectPropertyAccessor 33 implements PropertyAccessor // This is here to make javadoc show this class as an implementor 34 { 35 36 @Override 37 public Object getProperty( Map<String, Object> context, Object target, Object name ) 38 throws OgnlException 39 { 40 Set<?> set = (Set<?>) target; // check performed by the invoker 41 42 if ( name instanceof String ) 43 { 44 Object result; 45 46 if ( "size".equals( name ) ) 47 { 48 result = set.size(); 49 } 50 else if ( "iterator".equals( name ) ) 51 { 52 result = set.iterator(); 53 } 54 else if ( "isEmpty".equals( name ) ) 55 { 56 result = set.isEmpty() ? Boolean.TRUE : Boolean.FALSE; 57 } 58 else 59 { 60 result = super.getProperty( context, target, name ); 61 } 62 return result; 63 } 64 65 throw new NoSuchPropertyException( target, name ); 66 } 67 68 }