io.servicetalk.utils.internal

Class ReflectionUtils

Object

ReflectionUtils

public final class ReflectionUtils
extends Object

Provide utilities to assist reflective access. This class is forked from the netty project and modified to suit our needs.

Method Summary

Modifier and Type	Method and Description
static Method	retrieveMethod(Class<?> clazz, String name, Class<?>... parameterTypes) Retrieves the specific Method from the Class without checked exception.
static Throwable	trySetAccessible(AccessibleObject object, boolean checkAccessible) Try to call AccessibleObject.setAccessible(boolean) but will catch any SecurityException and java.lang.reflect.InaccessibleObjectException (for JDK 9) and return it.

Methods inherited from class Object

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

Method Detail

retrieveMethod

public static Method retrieveMethod(Class<?> clazz,
                                    String name,
                                    Class<?>... parameterTypes)

Retrieves the specific Method from the Class without checked exception.

Throws IllegalArgumentException if NoSuchMethodException is thrown.

Parameters:

clazz - Class to retrieve a Method from

name - the name of the method

parameterTypes - the list of method parameters

Returns:

the Method object

trySetAccessible

@Nullable
public static Throwable trySetAccessible(AccessibleObject object,
                                                   boolean checkAccessible)

Try to call AccessibleObject.setAccessible(boolean) but will catch any SecurityException and java.lang.reflect.InaccessibleObjectException (for JDK 9) and return it. The caller must check if it returns null and if not handle the returned exception.

Parameters:

object - The object to attempt to make accessible.

checkAccessible - true to respect system property configuration which may limit AccessibleObject.setAccessible(boolean) attempts. false to try regardless of system property configuration.

Returns:

a Throwable indicating the exception that occurred while attempting to make object accessible, or null if the operation was successful.