org.eclipse.gemini.blueprint.util.internal

Class ReflectionUtils

java.lang.Object

org.eclipse.gemini.blueprint.util.internal.ReflectionUtils

public abstract class ReflectionUtils
extends Object

Reflection related utility class. Similar to that found inside main Spring distribution but with customizations particular to this framework.

Author:

Costin Leau

See Also:

ReflectionUtils

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReflectionUtils.InvocationCheckedExceptionWrapper Runtime exception wrapper for checked exceptions thrown by invoked methods.

Constructor Summary

Constructors

Constructor and Description
ReflectionUtils()

Method Summary

Modifier and Type	Method and Description
static Exception	getInvocationException(Exception exception) Analyze the given exception and, if it's of type ReflectionUtils.InvocationCheckedExceptionWrapper then will return the actual cause, otherwise return the original exception given.
static void	handleInvocationTargetException(InvocationTargetException ex) Handle the given invocation target exception.
static Object	invokeMethod(Method method, Object target) Invoke the specified Method against the supplied target object with no arguments.
static Object	invokeMethod(Method method, Object target, Object[] args) Invoke the specified Method against the supplied target object with the supplied arguments.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectionUtils

public ReflectionUtils()

Method Detail

invokeMethod

public static Object invokeMethod(Method method,
                                  Object target)

Invoke the specified Method against the supplied target object with no arguments. The target object can be null when invoking a static Method.

This method is identical to ReflectionUtils.invokeMethod(Method, Object) except that if the target method throws a checked exception, the method will throw a InvocationCheckedException.

Thrown exceptions are handled via a call to #handleReflectionException.

Parameters:

method - the method to invoke

target - the target object to invoke the method on

Returns:

the invocation result, if any

See Also:

invokeMethod(java.lang.reflect.Method, Object, Object[])

invokeMethod

public static Object invokeMethod(Method method,
                                  Object target,
                                  Object[] args)

Invoke the specified Method against the supplied target object with the supplied arguments. The target object can be null when invoking a static Method.

This method is identical to ReflectionUtils.invokeMethod(Method, Object) except that if the target method throws a checked exception, the method will throw a InvocationCheckedException.

Thrown exceptions are handled via a call to #handleReflectionException.

Parameters:

method - the method to invoke

target - the target object to invoke the method on

args - the invocation arguments (may be null)

Returns:

the invocation result, if any

See Also:

invokeMethod(java.lang.reflect.Method, Object, Object[])

handleInvocationTargetException

public static void handleInvocationTargetException(InvocationTargetException ex)

Handle the given invocation target exception. Should only be called if no checked exception is expected to be thrown by the target method.

Throws the underlying RuntimeException or Error in case of such a root cause. Throws an InvocationCheckedException else (the main difference from ReflectionUtils.handleInvocationTargetException(InvocationTargetException).

Parameters:

ex - the invocation target exception to handle

getInvocationException

public static Exception getInvocationException(Exception exception)

Analyze the given exception and, if it's of type ReflectionUtils.InvocationCheckedExceptionWrapper then will return the actual cause, otherwise return the original exception given.

Parameters:

exception - invocation exception

Returns:

actual target exception, in case any wrapping took place