Coverage report

  %line %branch
net.sf.infrared.web.util.BeanComparator
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 1  
 /* 
 2  
  * Copyright 2005 Tavant Technologies and Contributors
 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, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.                                                                                               
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  * 
 16  
  *
 17  
  *
 18  
  * Original Author:  kamal.govindraj (Tavant Technologies)
 19  
  * Contributor(s):   -;
 20  
  *
 21  
  */
 22  
 package net.sf.infrared.web.util;
 23  
 
 24  
 import org.apache.commons.beanutils.MethodUtils;
 25  
 
 26  
 import java.lang.reflect.InvocationTargetException;
 27  
 import java.util.Comparator;
 28  
 
 29  
 /**
 30  
  * A simple comparator implementation that enables comparing two
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  * bean instances based on a specified property.
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  */
 33  
 public class BeanComparator implements Comparator
 34  
 {
 35  0
     String methodName = null;
 36  0
     boolean ascending = true;
 37  
     public BeanComparator(String methodName, boolean ascending)
 38  0
     {
 39  0
         this.methodName = methodName;
 40  0
         this.ascending = ascending;
 41  0
     }
 42  
 
 43  
     public int compare(Object o1, Object o2)
 44  
     {
 45  0
         Object fieldOne = null;
 46  0
         Object fieldTwo = null;
 47  
         try
 48  
         {
 49  0
             fieldOne = MethodUtils.invokeExactMethod(o1,methodName,null);
 50  0
             fieldTwo = MethodUtils.invokeExactMethod(o2,methodName,null);
 51  
         }
 52  0
         catch (NoSuchMethodException e)
 53  
         {
 54  0
             throw new RuntimeException(e);
 55  
         }
 56  0
         catch (IllegalAccessException e)
 57  
         {
 58  0
             throw new RuntimeException(e);
 59  
         }
 60  0
         catch (IllegalArgumentException e)
 61  
         {
 62  0
             throw new RuntimeException(e);
 63  
         }
 64  0
         catch (InvocationTargetException e)
 65  
         {
 66  0
             throw new RuntimeException(e);
 67  0
         }
 68  
 
 69  0
         if (fieldOne != null
 70  
             && fieldTwo != null
 71  
             && fieldOne.getClass().equals(fieldTwo.getClass())
 72  
             && fieldOne instanceof Comparable
 73  
             && fieldTwo instanceof Comparable)
 74  
         {
 75  0
             int retValue = ((Comparable)fieldOne).compareTo(fieldTwo);
 76  0
             return (ascending ? retValue : (retValue*-1));
 77  
         }
 78  
         else
 79  
         {
 80  0
             throw new IllegalArgumentException("Error comparing object "
 81  
                                                + o1.toString()
 82  
                                                + " with "
 83  
                                                + o2.toString() );
 84  
         }
 85  
     }
 86  
 
 87  
     public void setAscending(boolean ascending)
 88  
     {
 89  0
         this.ascending = ascending;
 90  0
     }
 91  
 
 92  
 }

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