net.lenni0451.reflect.wrapper

Class ASMWrapper

java.lang.Object

net.lenni0451.reflect.wrapper.ASMWrapper

public class ASMWrapper
extends java.lang.Object

A wrapper for the java internal ASM library.
If ASM is present on the classpath it will be used instead.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ASMWrapper.MethodVisitorAccess A wrapper for the ASM method visitor.

Method Summary

Modifier and Type	Method and Description
static ASMWrapper	create(int access, java.lang.String name, java.lang.String signature, java.lang.String superName, java.lang.String[] interfaces) Create a new ASM wrapper with the given class properties.
java.lang.Class<?>	defineAnonymously(java.lang.Class<?> parent) Define the class anonymously.
java.lang.Class<?>	defineMetafactory(java.lang.Class<?> parent) Define the class as a strong nestmate (like the LambdaMetafactory).
static java.lang.String	desc(java.lang.Class<?> clazz) Get the descriptor for the given class.
static java.lang.String	desc(java.lang.Class<?>[] parameterTypes, java.lang.Class<?> returnType) Get the descriptor for the given parameter types and return type.
static java.lang.String	desc(java.lang.reflect.Method method) Get the descriptor for the given method.
static java.lang.String	desc(java.lang.String className) Get a descriptor for the given class name.
static int	getLoadOpcode(java.lang.Class<?> clazz) Get the fitting return opcode for the given type.
static int	getReturnOpcode(java.lang.Class<?> clazz) Get the fitting return opcode for the given type.
static int	opcode(java.lang.String name) Get an opcode by its name.
static java.lang.String	slash(java.lang.Class<?> clazz) Get the name of the class with slashes instead of dots.
static java.lang.String	slash(java.lang.String className) Replace all dots with slashes.
byte[]	toByteArray() Get the byte array of the generated class.
void	visitField(int access, java.lang.String name, java.lang.String descriptor, java.lang.String signature, java.lang.Object value) Visit a field in the class.
ASMWrapper.MethodVisitorAccess	visitMethod(int access, java.lang.String name, java.lang.String descriptor, java.lang.String signature, java.lang.String[] exceptions) Visit a method in the class.

Methods inherited from class java.lang.Object

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

Method Detail

opcode

public static int opcode(java.lang.String name)

Get an opcode by its name.

Parameters:

name - The name of the opcode

Returns:

The opcode

Throws:

java.lang.NullPointerException - If the opcode does not exist

slash

public static java.lang.String slash(java.lang.String className)

Replace all dots with slashes.

Parameters:

className - The class name

Returns:

The class name with replaced dots

slash

public static java.lang.String slash(java.lang.Class<?> clazz)

Get the name of the class with slashes instead of dots.

Parameters:

clazz - The class

Returns:

The class name with slashes

desc

public static java.lang.String desc(java.lang.String className)

Get a descriptor for the given class name.
Dots in the class name will automatically be replaced with slashes.

Parameters:

className - The class name

Returns:

The descriptor

desc

public static java.lang.String desc(java.lang.Class<?> clazz)

Get the descriptor for the given class.
This also supports primitive types and arrays.

Parameters:

clazz - The class

Returns:

The descriptor

desc

public static java.lang.String desc(java.lang.reflect.Method method)

Get the descriptor for the given method.

Parameters:

method - The method

Returns:

The descriptor

desc

public static java.lang.String desc(java.lang.Class<?>[] parameterTypes,
                                    java.lang.Class<?> returnType)

Get the descriptor for the given parameter types and return type.

Parameters:

parameterTypes - The parameter types

returnType - The return type

Returns:

The descriptor

getLoadOpcode

public static int getLoadOpcode(java.lang.Class<?> clazz)

Get the fitting return opcode for the given type.

Parameters:

clazz - The type

Returns:

The opcode

getReturnOpcode

public static int getReturnOpcode(java.lang.Class<?> clazz)

Get the fitting return opcode for the given type.
Void will return RETURN.

Parameters:

clazz - The type

Returns:

The opcode

create

public static ASMWrapper create(int access,
                                @Nonnull
                                java.lang.String name,
                                @Nullable
                                java.lang.String signature,
                                @Nonnull
                                java.lang.String superName,
                                @Nullable
                                java.lang.String[] interfaces)

Create a new ASM wrapper with the given class properties.

Parameters:

access - The access flags

name - The class name

signature - The signature

superName - The super class name

interfaces - The interfaces

Returns:

The ASM wrapper

visitField

public void visitField(int access,
                       @Nonnull
                       java.lang.String name,
                       @Nonnull
                       java.lang.String descriptor,
                       @Nullable
                       java.lang.String signature,
                       @Nullable
                       java.lang.Object value)

Visit a field in the class.

Parameters:

access - The access flags

name - The field name

descriptor - The field descriptor

signature - The field signature

value - The field value

visitMethod

public ASMWrapper.MethodVisitorAccess visitMethod(int access,
                                                  java.lang.String name,
                                                  java.lang.String descriptor,
                                                  java.lang.String signature,
                                                  java.lang.String[] exceptions)

Visit a method in the class.

Parameters:

access - The access flags

name - The method name

descriptor - The method descriptor

signature - The method signature

exceptions - The exceptions

Returns:

The method visitor

toByteArray

public byte[] toByteArray()

Get the byte array of the generated class.

Returns:

The byte array

defineAnonymously

public java.lang.Class<?> defineAnonymously(java.lang.Class<?> parent)

Define the class anonymously.

Parameters:

parent - The parent class

Returns:

The defined class

defineMetafactory

public java.lang.Class<?> defineMetafactory(java.lang.Class<?> parent)

Define the class as a strong nestmate (like the LambdaMetafactory).

Parameters:

parent - The parent class

Returns:

The defined class