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 This method defines a new class in the given ClassLoader to get the MethodHandles.Lookup
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(@Nonnull
                                                                    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(@Nonnull
                                                                            java.lang.invoke.MethodHandles.Lookup lookup,
                                                                            @Nonnull
                                                                            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(@Nonnull
                                java.lang.invoke.MethodHandles.Lookup lookup,
                                @Nonnull
                                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(@Nonnull
                                java.lang.Class<?> wanted,
                                @Nonnull
                                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