Package eu.cloudnetservice.driver.util.define

Class LookupClassDefiner

java.lang.Object

eu.cloudnetservice.driver.util.define.LookupClassDefiner

All Implemented Interfaces:

ClassDefiner

@Internal
final class LookupClassDefiner
extends Object
implements ClassDefiner

A class definer for modern jvm implementation (Java 15+) which makes use of the newly added defineHiddenClass method in the Lookup class.

Since:

4.0

Field Summary

Fields

Modifier and Type	Field	Description
private static final MethodHandles.Lookup	TRUSTED_LOOKUP	The jvm trusted lookup instance.

Constructor Summary

Constructors

Constructor	Description
LookupClassDefiner()

Method Summary

Modifier and Type	Method	Description
static boolean	available()	Get if the lookup class definer requirements are met to use the definer in the current jvm.
@NonNull Class<?>	defineClass(@NonNull String name, @NonNull Class<?> parent, byte[] bytecode)	Defines the given class bytecode and return the constructed class object.

Methods inherited from class java.lang.Object

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

Field Details

TRUSTED_LOOKUP

private static final MethodHandles.Lookup TRUSTED_LOOKUP

The jvm trusted lookup instance. It allows access to every lookup even if the access to these classes is denied for the current module.

Constructor Details

LookupClassDefiner

LookupClassDefiner()

Method Details

available

public static boolean available()

Get if the lookup class definer requirements are met to use the definer in the current jvm.

Returns:

if the lookup class definer requirements are met to use the definer in the current jvm.

defineClass

@NonNull
public @NonNull Class<?> defineClass(@NonNull
 @NonNull String name,
 @NonNull
 @NonNull Class<?> parent,
 byte[] bytecode)

Defines the given class bytecode and return the constructed class object.

Specified by:

defineClass in interface ClassDefiner

Parameters:

name - the name of the class to construct.

parent - the parent class of this class as we are assuming to define an anonymous class.

bytecode - the bytecode of the class to define.

Returns:

the constructed class object from the given bytecode.