net.lenni0451.classtransform.utils.annotations

Class ClassDefiner<T>

java.lang.Object

net.lenni0451.classtransform.utils.annotations.ClassDefiner<T>

Type Parameters:

T - The type of the class

public class ClassDefiner<T>
extends java.lang.Object

Define anonymous classes at runtime.
This class uses Unsafe for older java versions and method handles for newer versions.

Method Summary

Modifier and Type	Method and Description
static <T> ClassDefiner<T>	defineAnonymousClass(byte[] bytecode) Define an anonymous class.
static java.lang.String	generateClassName(java.lang.String name) Generate a name for the defined class.
java.lang.Class<?>	getClazz()
T	newInstance() Create a new instance of the defined class.
T	newInstance(java.lang.Class<?>[] types, java.lang.Object[] values) Create a new instance of the defined class using the given arguments.
T	newInstance(java.lang.Object... args) Create a new instance of the defined class using the given arguments.

Methods inherited from class java.lang.Object

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

Method Detail

generateClassName

public static java.lang.String generateClassName(java.lang.String name)

Generate a name for the defined class.
When using method handles to define a class the package name has to be the same as the caller class.

Parameters:

name - The name of the class

Returns:

The generated name

defineAnonymousClass

public static <T> ClassDefiner<T> defineAnonymousClass(byte[] bytecode)

Define an anonymous class.

Type Parameters:

T - The type of the class

Parameters:

bytecode - The bytecode of the class

Returns:

The defined class

Throws:

java.lang.ClassCastException - When the defined class is not of the given type

java.lang.RuntimeException - When the class could not be defined

getClazz

public java.lang.Class<?> getClazz()

Returns:

The defined class

newInstance

public T newInstance()
              throws java.lang.reflect.InvocationTargetException,
                     java.lang.NoSuchMethodException,
                     java.lang.InstantiationException,
                     java.lang.IllegalAccessException

Create a new instance of the defined class.

Returns:

The new instance

Throws:

java.lang.reflect.InvocationTargetException - When the constructor throws an exception

java.lang.NoSuchMethodException - When the class does not have a default constructor

java.lang.InstantiationException - When the class is abstract

java.lang.IllegalAccessException - When the class is not public

newInstance

public T newInstance(java.lang.Object... args)
              throws java.lang.reflect.InvocationTargetException,
                     java.lang.NoSuchMethodException,
                     java.lang.InstantiationException,
                     java.lang.IllegalAccessException

Create a new instance of the defined class using the given arguments.

Parameters:

args - The arguments for the constructor

Returns:

The new instance

Throws:

java.lang.reflect.InvocationTargetException - When the constructor throws an exception

java.lang.NoSuchMethodException - When the class does not have a constructor with the given arguments

java.lang.InstantiationException - When the class is abstract

java.lang.IllegalAccessException - When the class is not public

newInstance

public T newInstance(java.lang.Class<?>[] types,
                     java.lang.Object[] values)
              throws java.lang.NoSuchMethodException,
                     java.lang.reflect.InvocationTargetException,
                     java.lang.InstantiationException,
                     java.lang.IllegalAccessException

Create a new instance of the defined class using the given arguments.

Parameters:

types - The types of the arguments

values - The arguments for the constructor

Returns:

The new instance

Throws:

java.lang.NoSuchMethodException - When the class does not have a constructor with the given arguments

java.lang.reflect.InvocationTargetException - When the constructor throws an exception

java.lang.InstantiationException - When the class is abstract

java.lang.IllegalAccessException - When the class is not public