org.jboss.portal.common.reflect
Class Reflection

java.lang.Object
  org.jboss.portal.common.reflect.Reflection

public class Reflection
extends java.lang.Object

Version:

$Revision: 1.1 $

Author:

Julien Viet

Constructor Summary

Reflection()

Method Summary

static java.lang.reflect.Method	findMethod(java.lang.Class clazz, java.lang.String methodName, java.lang.Class[] parameterTypes) Search a method on the specified class.
static <T> T	safeCast(java.lang.Object value, java.lang.Class<T> type) Attempt to cast the value argument to the provided type argument.

Methods inherited from class java.lang.Object

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

Constructor Detail

Reflection

public Reflection()

Method Detail

findMethod

public static java.lang.reflect.Method findMethod(java.lang.Class clazz,
                                                  java.lang.String methodName,
                                                  java.lang.Class[] parameterTypes)
                                           throws java.lang.IllegalArgumentException

Search a method on the specified class. The search will try find methods with any scope and will start with the provided class. First it will inspect the public method on the class, if one is found then this method is returned. If no public method is found then it will inspect the declared methods of the provided class and its super classes.

Parameters:

clazz - the class to inspect

methodName - the method name

parameterTypes - the parameter types

Returns:

the matched method or null

Throws:

java.lang.IllegalArgumentException - if one argument is null

safeCast

public static <T> T safeCast(java.lang.Object value,
                             java.lang.Class<T> type)
                  throws java.lang.IllegalArgumentException

Attempt to cast the value argument to the provided type argument. If the value argument type is assignable to the provided type, the value is returned, otherwise if it is not or the value is null, null is returned.

Parameters:

value - the value to cast

type - the type to downcast

Returns:

the casted value or null

Throws:

java.lang.IllegalArgumentException - if the type argument is null