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1   /*
2    * Copyright 2004-2006 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.tuigwaa.util.functor;
17  
18  import java.lang.reflect.InvocationTargetException;
19  
20  import org.apache.commons.beanutils.PropertyUtils;
21  
22  import com.isenshi.util.functor.UnaryFunction;
23  
24  public class PropertyFunction implements UnaryFunction {
25  
26  	private String nestedField;
27  
28  	public PropertyFunction(String nestedField) {
29  		this.nestedField = nestedField;
30  	}
31  
32  	public Object evaluate(Object data) {
33  		
34  		if(data == null){
35  			return "";
36  		}
37  		
38  		try {
39  			data = PropertyUtils.getProperty(data, nestedField);
40  		} catch (IllegalAccessException e) {
41  			e.printStackTrace();
42  			throw new RuntimeException(e);
43  		} catch (InvocationTargetException e) {
44  			e.printStackTrace();
45  			throw new RuntimeException(e);
46  		} catch (NoSuchMethodException e) {
47  			e.printStackTrace();
48  			throw new RuntimeException(e);
49  		}
50  
51  		return data;
52  	}
53  
54  }