Package com.broadleafcommerce.common.extension.reflection

Class ReflectionUtils

java.lang.Object

com.broadleafcommerce.common.extension.reflection.ReflectionUtils

public class ReflectionUtils
extends Object

Inspired by Spring's ReflectionUtils. Simple utility class for working with the reflection API and handling reflection exceptions.

Constructor Summary

Constructors

Constructor	Description
ReflectionUtils()

Method Summary

Modifier and Type	Method	Description
static void	handleInvocationTargetException(InvocationTargetException ex)	Handle the given invocation target exception.
static void	handleReflectionException(Exception ex)	Handle the given reflection exception.
static Object	invokeMethod(Method method, Object target, Object... args)	Invoke the specified Method against the supplied target object with the supplied arguments.
static void	rethrowRuntimeException(Throwable ex)	Rethrow the given exception, which is presumably the target exception of an InvocationTargetException.

Methods inherited from class java.lang.Object

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

Constructor Details

ReflectionUtils

public ReflectionUtils()

Method Details

invokeMethod

@Nullable
public static Object invokeMethod(Method method,
 @Nullable
 Object target,
 @Nullable
 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.

Thrown exceptions are handled via a call to handleReflectionException(java.lang.Exception).

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

handleReflectionException

public static void handleReflectionException(Exception ex)

Handle the given reflection exception.

Should only be called if no checked exception is expected to be thrown by a target method, or if an error occurs while accessing a method or field.

Throws the underlying RuntimeException or Error in case of an InvocationTargetException with such a root cause. Throws an IllegalStateException with an appropriate message or UndeclaredThrowableException otherwise.

Parameters:

ex - the reflection exception to handle

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 UndeclaredThrowableException otherwise.

Parameters:

ex - the invocation target exception to handle

rethrowRuntimeException

public static void rethrowRuntimeException(Throwable ex)

Rethrow the given exception, which is presumably the target exception of an InvocationTargetException. Should only be called if no checked exception is expected to be thrown by the target method.

Rethrows the underlying exception cast to a RuntimeException or Error if appropriate; otherwise, throws an UndeclaredThrowableException.

Parameters:

ex - the exception to rethrow

Throws:

RuntimeException - the rethrown exception