Clover coverage report - Code Coverage for hivemind release 1.1-beta-1
Coverage timestamp: Thu Apr 28 2005 19:53:41 EDT
file stats: LOC: 149   Methods: 6
NCLOC: 85   Classes: 1
30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover
 
 Source file Conditionals Statements Methods TOTAL
ConstructorUtils.java 68.2% 85% 83.3% 79.4%
coverage coverage
 1   
 // Copyright 2004, 2005 The Apache Software Foundation
 2   
 //
 3   
 // Licensed under the Apache License, Version 2.0 (the "License");
 4   
 // you may not use this file except in compliance with the License.
 5   
 // You may obtain a copy of the License at
 6   
 //
 7   
 //     http://www.apache.org/licenses/LICENSE-2.0
 8   
 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
 11   
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12   
 // See the License for the specific language governing permissions and
 13   
 // limitations under the License.
 14   
 
 15   
 package org.apache.hivemind.util;
 16   
 
 17   
 import java.lang.reflect.Constructor;
 18   
 import java.lang.reflect.InvocationTargetException;
 19   
 import java.util.HashMap;
 20   
 import java.util.Map;
 21   
 
 22   
 import org.apache.hivemind.ApplicationRuntimeException;
 23   
 
 24   
 /**
 25   
  * Static methods for invoking constructors.
 26   
  * 
 27   
  * @author Howard Lewis Ship
 28   
  */
 29   
 public class ConstructorUtils
 30   
 {
 31   
 
 32   
     /**
 33   
      * Map from primitive type to wrapper type.
 34   
      */
 35   
     private static final Map _primitiveMap = new HashMap();
 36   
 
 37   
     static
 38   
     {
 39  1
         _primitiveMap.put(boolean.class, Boolean.class);
 40  1
         _primitiveMap.put(byte.class, Byte.class);
 41  1
         _primitiveMap.put(char.class, Character.class);
 42  1
         _primitiveMap.put(short.class, Short.class);
 43  1
         _primitiveMap.put(int.class, Integer.class);
 44  1
         _primitiveMap.put(long.class, Long.class);
 45  1
         _primitiveMap.put(float.class, Float.class);
 46  1
         _primitiveMap.put(double.class, Double.class);
 47   
     }
 48   
 
 49   
     // Prevent instantiation
 50   
 
 51  0
     private ConstructorUtils()
 52   
     {
 53   
     }
 54   
 
 55   
     /**
 56   
      * Searches for a constructor matching against the provided arguments.
 57   
      * 
 58   
      * @param targetClass
 59   
      *            the class to be instantiated
 60   
      * @param parameters
 61   
      *            the parameters to pass to the constructor (may be null or empty)
 62   
      * @return the new instance
 63   
      * @throws ApplicationRuntimeException
 64   
      *             on any failure
 65   
      */
 66  32
     public static Object invokeConstructor(Class targetClass, Object[] parameters)
 67   
     {
 68  32
         if (parameters == null)
 69  0
             parameters = new Object[0];
 70   
 
 71  32
         Class[] parameterTypes = new Class[parameters.length];
 72   
 
 73  32
         for (int i = 0; i < parameters.length; i++)
 74  32
             parameterTypes[i] = parameters[i] == null ? null : parameters[i].getClass();
 75   
 
 76  32
         return invokeMatchingConstructor(targetClass, parameterTypes, parameters);
 77   
     }
 78   
 
 79  32
     private static Object invokeMatchingConstructor(Class targetClass, Class[] parameterTypes,
 80   
             Object[] parameters)
 81   
     {
 82  32
         Constructor[] constructors = targetClass.getConstructors();
 83   
 
 84  32
         for (int i = 0; i < constructors.length; i++)
 85   
         {
 86  32
             Constructor c = constructors[i];
 87   
 
 88  32
             if (isMatch(c, parameterTypes))
 89  32
                 return invoke(c, parameters);
 90   
         }
 91   
 
 92  0
         throw new ApplicationRuntimeException(UtilMessages.noMatchingConstructor(targetClass), null);
 93   
     }
 94   
 
 95  32
     private static boolean isMatch(Constructor c, Class[] types)
 96   
     {
 97  32
         Class[] actualTypes = c.getParameterTypes();
 98   
 
 99  32
         if (actualTypes.length != types.length)
 100  0
             return false;
 101   
 
 102  32
         for (int i = 0; i < types.length; i++)
 103   
         {
 104  32
             if (types[i] == null && !actualTypes[i].isPrimitive())
 105  0
                 continue;
 106   
 
 107  32
             if (!isCompatible(actualTypes[i], types[i]))
 108  0
                 return false;
 109   
         }
 110   
 
 111  32
         return true;
 112   
     }
 113   
 
 114  50
     public static boolean isCompatible(Class actualType, Class parameterType)
 115   
     {
 116  50
         if (actualType.isAssignableFrom(parameterType))
 117  38
             return true;
 118   
 
 119   
         // Reflection fudges the assignment of a wrapper class to a primitive
 120   
         // type ... we check for that the hard way.
 121   
 
 122  12
         if (actualType.isPrimitive())
 123   
         {
 124  5
             Class wrapperClass = (Class) _primitiveMap.get(actualType);
 125   
 
 126  5
             return wrapperClass.isAssignableFrom(parameterType);
 127   
         }
 128   
 
 129  7
         return false;
 130   
     }
 131   
 
 132  530
     public static Object invoke(Constructor c, Object[] parameters)
 133   
     {
 134  530
         try
 135   
         {
 136  530
             return c.newInstance(parameters);
 137   
         }
 138   
         catch (InvocationTargetException ex)
 139   
         {
 140  1
             Throwable cause = ex.getTargetException();
 141   
 
 142  1
             throw new ApplicationRuntimeException(UtilMessages.invokeFailed(c, cause), null, cause);
 143   
         }
 144   
         catch (Exception ex)
 145   
         {
 146  0
             throw new ApplicationRuntimeException(UtilMessages.invokeFailed(c, ex), null, ex);
 147   
         }
 148   
     }
 149   
 }