Package com.sun.jna.internal

Class ReflectionUtils

java.lang.Object

com.sun.jna.internal.ReflectionUtils

public class ReflectionUtils
extends Object

Helper class to invoke default method reflectively.

This class is intented to be used only be JNA itself.

This implementation is inspired by: Correct Reflective Access to Interface Default Methods in Java 8, 9, 10

Constructor Summary

Constructors

Constructor	Description
ReflectionUtils()

Method Summary

Modifier and Type	Method	Description
static Object	getMethodHandle(Method method)	Retrieve the method handle, that can be used to invoke the provided method.
static Object	invokeDefaultMethod(Object target, Object methodHandle, Object... args)	Invokes a default method reflectively.
static boolean	isDefault(Method method)	Check if the supplied method object represents a default method.

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

isDefault

public static boolean isDefault(Method method)

Check if the supplied method object represents a default method.

This is the reflective equivalent of method.isDefault().

Parameters:

method -

Returns:

true if JVM supports default methods and method is a default method

getMethodHandle

public static Object getMethodHandle(Method method)
                              throws Exception

Retrieve the method handle, that can be used to invoke the provided method. It is only intended to be used to call default methods on interfaces.

Parameters:

method -

Returns:

method handle that can be used to invoke the supplied method

Throws:

Exception

invokeDefaultMethod

public static Object invokeDefaultMethod(Object target,
                                         Object methodHandle,
                                         Object... args)
                                  throws Throwable

Invokes a default method reflectively. The method must be called with the method handle for a default method on an interfaces.

Parameters:

target - object to invoke the supplied method handle on

methodHandle - retrieved via getMethodHandle(java.lang.reflect.Method)

args -

Returns:

result of the invokation

Throws:

Throwable