com.ebasetech.ufs.utility
Class ReflectionUtil

java.lang.Object
  com.ebasetech.ufs.utility.ReflectionUtil

public class ReflectionUtil

extends java.lang.Object

Handy functions for dealing with reflection. Notably - access to their privates

Constructor Summary

ReflectionUtil()

Method Summary

static java.lang.reflect.Constructor	findConstructor(java.lang.Class cls, java.lang.Class[] parameterTypes, boolean makeAccessible)
static java.lang.reflect.Field	findField(java.lang.Class cls, java.lang.String fieldName, boolean makeAccessible)
static java.lang.reflect.Method	findMethod(java.lang.Class cls, java.lang.String methodName, java.lang.Class[] parameterTypes, boolean makeAccessible)
static java.lang.Object	instantiateConstructor(java.lang.reflect.Constructor constr, java.lang.Object[] arguments) make a new instance using the provided constructor.
static java.lang.Object	instantiateConstructorAndCheckCast(java.lang.String clsname, java.lang.Class[] castTo) instantiate a class and check it can be cast into required interfaces/classes
static java.lang.Object	instantiatePrivateConstructor(java.lang.Class cls, java.lang.Class[] parameterTypes, java.lang.Object[] arguments)
static java.lang.Object	invokeMethod(java.lang.reflect.Method method, java.lang.Object obj, java.lang.Object[] args)
static java.lang.Object	invokePrivateMethod(java.lang.Object obj, java.lang.String methodName, java.lang.Class[] parameterTypes, java.lang.Object[] args)
static void	multiCast(java.lang.Class cls, java.lang.Class[] castTo) check that an instance of a class could be cast to a bunch of classes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReflectionUtil

public ReflectionUtil()

Method Detail

findConstructor

public static java.lang.reflect.Constructor findConstructor(java.lang.Class cls,
                                                            java.lang.Class[] parameterTypes,
                                                            boolean makeAccessible)
                                                     throws java.lang.NoSuchMethodException

Throws:

java.lang.NoSuchMethodException

instantiateConstructor

public static java.lang.Object instantiateConstructor(java.lang.reflect.Constructor constr,
                                                      java.lang.Object[] arguments)
                                               throws java.lang.IllegalAccessException,
                                                      java.lang.reflect.InvocationTargetException,
                                                      java.lang.InstantiationException

make a new instance using the provided constructor.

Parameters:

constr - Constructor to use to instantiate

arguments - arguments for the constructor.

Returns:

ne instance

Throws:

java.lang.IllegalAccessException

java.lang.reflect.InvocationTargetException

java.lang.InstantiationException

instantiatePrivateConstructor

public static java.lang.Object instantiatePrivateConstructor(java.lang.Class cls,
                                                             java.lang.Class[] parameterTypes,
                                                             java.lang.Object[] arguments)
                                                      throws java.lang.NoSuchMethodException,
                                                             java.lang.IllegalAccessException,
                                                             java.lang.reflect.InvocationTargetException,
                                                             java.lang.InstantiationException

Throws:

java.lang.NoSuchMethodException

java.lang.IllegalAccessException

java.lang.reflect.InvocationTargetException

java.lang.InstantiationException

instantiateConstructorAndCheckCast

public static java.lang.Object instantiateConstructorAndCheckCast(java.lang.String clsname,
                                                                  java.lang.Class[] castTo)
                                                           throws java.lang.ClassNotFoundException,
                                                                  java.lang.IllegalAccessException,
                                                                  java.lang.InstantiationException

instantiate a class and check it can be cast into required interfaces/classes

Parameters:

clsname - the class to instantiate

castTo - the interfaces to check

Returns:

a new instance

Throws:

java.lang.ClassNotFoundException

java.lang.IllegalAccessException

java.lang.InstantiationException

multiCast

public static void multiCast(java.lang.Class cls,
                             java.lang.Class[] castTo)

check that an instance of a class could be cast to a bunch of classes

Parameters:

cls - the class to test

castTo - array of class to check

Throws:

java.lang.ClassCastException - is one of the casts fails

findMethod

public static java.lang.reflect.Method findMethod(java.lang.Class cls,
                                                  java.lang.String methodName,
                                                  java.lang.Class[] parameterTypes,
                                                  boolean makeAccessible)
                                           throws java.lang.NoSuchMethodException

Throws:

java.lang.NoSuchMethodException

invokeMethod

public static java.lang.Object invokeMethod(java.lang.reflect.Method method,
                                            java.lang.Object obj,
                                            java.lang.Object[] args)
                                     throws java.lang.IllegalAccessException,
                                            java.lang.reflect.InvocationTargetException

Throws:

java.lang.IllegalAccessException

java.lang.reflect.InvocationTargetException

invokePrivateMethod

public static java.lang.Object invokePrivateMethod(java.lang.Object obj,
                                                   java.lang.String methodName,
                                                   java.lang.Class[] parameterTypes,
                                                   java.lang.Object[] args)
                                            throws java.lang.IllegalAccessException,
                                                   java.lang.reflect.InvocationTargetException,
                                                   java.lang.NoSuchMethodException

Throws:

java.lang.IllegalAccessException

java.lang.reflect.InvocationTargetException

java.lang.NoSuchMethodException

findField

public static java.lang.reflect.Field findField(java.lang.Class cls,
                                                java.lang.String fieldName,
                                                boolean makeAccessible)
                                         throws java.lang.NoSuchFieldException

Throws:

java.lang.NoSuchFieldException