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 }