net.lenni0451.lambdaevents.utils

Class LookupUtils

java.lang.Object

net.lenni0451.lambdaevents.utils.LookupUtils

public class LookupUtils
extends java.lang.Object

Various utils for MethodHandles.Lookup.

Constructor Summary

Constructors

Constructor and Description
LookupUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	canAccess(java.lang.Class<?> wanted, java.lang.Class<?> clazz) Reimplementation of VerifyAccess.isTypeVisible(Class, Class).
static boolean	canAccess(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class<?> clazz) Check if the given lookup can access the given class.
static java.lang.invoke.MethodHandles.Lookup	getIn(java.lang.ClassLoader classLoader) Get a MethodHandles.Lookup in the given ClassLoader.
static java.lang.invoke.MethodHandles.Lookup	resolveLookup(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class<?> accessed) Resolve a lookup to access a given class.

Methods inherited from class java.lang.Object

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

Constructor Detail

LookupUtils

public LookupUtils()

Method Detail

getIn

@Nonnull
public static java.lang.invoke.MethodHandles.Lookup getIn(java.lang.ClassLoader classLoader)

Get a MethodHandles.Lookup in the given ClassLoader.
This method defines a new class in the given ClassLoader to get the MethodHandles.Lookup.

Parameters:

classLoader - The class loader to get the lookup in

Returns:

The lookup

resolveLookup

@Nonnull
public static java.lang.invoke.MethodHandles.Lookup resolveLookup(java.lang.invoke.MethodHandles.Lookup lookup,
                                                                            java.lang.Class<?> accessed)

Resolve a lookup to access a given class.

Parameters:

lookup - The lookup to resolve

accessed - The class to access

Returns:

The resolved lookup

Throws:

java.lang.IllegalStateException - If the lookup can't be resolved to access the given class

canAccess

public static boolean canAccess(java.lang.invoke.MethodHandles.Lookup lookup,
                                java.lang.Class<?> clazz)

Check if the given lookup can access the given class.

Parameters:

lookup - The lookup to check

clazz - The class to check

Returns:

If the lookup can access the given class

canAccess

public static boolean canAccess(java.lang.Class<?> wanted,
                                java.lang.Class<?> clazz)

Reimplementation of VerifyAccess.isTypeVisible(Class, Class).

Parameters:

wanted - The class that should be visible

clazz - The class that should be able to see the wanted class

Returns:

If the wanted class is accessible