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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.lang.reflect.Method;
23  import java.util.List;
24  import java.util.Map;
25  
26  /**
27   * Implementation of PropertyAccessor that uses reflection on the target object's class to find a field or a pair of
28   * set/get methods with the given property name.
29   * 
30   * @author Luke Blanshard (blanshlu@netscape.net)
31   * @author Drew Davidson (drew@ognl.org)
32   */
33  public class ObjectMethodAccessor
34      implements MethodAccessor
35  {
36  
37      /**
38       * {@inheritDoc}
39       */
40      public Object callStaticMethod( Map<String, Object> context, Class<?> targetClass, String methodName,
41                                      Object[] args )
42          throws MethodFailedException
43      {
44          List<Method> methods = OgnlRuntime.getMethods( targetClass, methodName, true );
45  
46          return OgnlRuntime.callAppropriateMethod( (OgnlContext) context, targetClass, null, methodName, null, methods,
47                                                    args );
48      }
49  
50      /**
51       * {@inheritDoc}
52       */
53      public Object callMethod( Map<String, Object> context, Object target, String methodName, Object[] args )
54          throws MethodFailedException
55      {
56          Class<?> targetClass = ( target == null ) ? null : target.getClass();
57          List<Method> methods = OgnlRuntime.getMethods( targetClass, methodName, false );
58  
59          if ( ( methods == null ) || ( methods.size() == 0 ) )
60          {
61              methods = OgnlRuntime.getMethods( targetClass, methodName, true );
62  
63          }
64  
65          return OgnlRuntime.callAppropriateMethod( (OgnlContext) context, target, target, methodName, null, methods,
66                                                    args );
67      }
68  }