net.lenni0451.commons.asm

Class ASMUtils

java.lang.Object

net.lenni0451.commons.asm.ASMUtils

public class ASMUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ASMUtils()

Method Summary

Modifier and Type	Method and Description
static org.objectweb.asm.tree.AbstractInsnNode	boxPrimitive(org.objectweb.asm.Type primitive) Get the instruction to box a primitive type.
static org.objectweb.asm.tree.InsnList	castObjectTo(org.objectweb.asm.Type targetType) Get the instructions to cast an object to a specific type.
static org.objectweb.asm.tree.ClassNode	createEmptyClass(java.lang.String name) Create a new empty class node.
static java.lang.String	dot(java.lang.String s) Replace all slashes with dots.
static org.objectweb.asm.tree.AbstractInsnNode	doublePush(double d) Get the most optimal instruction to push the given double onto the stack.
static org.objectweb.asm.tree.AbstractInsnNode	floatPush(float f) Get the most optimal instruction to push the given float onto the stack.
static int	freeVarIndex(org.objectweb.asm.tree.MethodNode methodNode) Calculate the variable index of the first free variable in a method.
static java.lang.String	generateVariableName(org.objectweb.asm.Type type, java.util.function.Predicate<java.lang.String> doesExist) Generate a variable name for a type that does not exist yet.
static org.objectweb.asm.tree.FieldNode	getField(org.objectweb.asm.tree.ClassNode classNode, java.lang.String name, java.lang.String desc) Get a field from a class node.
static org.objectweb.asm.tree.MethodNode	getMethod(org.objectweb.asm.tree.ClassNode classNode, java.lang.String name, java.lang.String desc) Get a method from a class node.
static org.objectweb.asm.tree.AbstractInsnNode	intPush(int i) Get the most optimal instruction to push the given integer onto the stack.
static org.objectweb.asm.tree.InsnList	loadMethodArgs(org.objectweb.asm.tree.MethodNode method) Get the instructions to load the arguments of a method onto the stack.
static org.objectweb.asm.tree.AbstractInsnNode	longPush(long l) Get the most optimal instruction to push the given long onto the stack.
static int[]	parameterIndices(org.objectweb.asm.tree.MethodNode methodNode) Calculate the indices of the parameters of a method.
static java.lang.String	slash(java.lang.String s) Replace all dots with slashes.
static org.objectweb.asm.tree.InsnList	swap(org.objectweb.asm.Type top, org.objectweb.asm.Type bottom) Get the instructions to swap the first two elements on the stack.
static java.lang.Number	toNumber(org.objectweb.asm.tree.AbstractInsnNode instruction) Get the number the given instruction pushes onto the stack.

Methods inherited from class java.lang.Object

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

Constructor Detail

ASMUtils

public ASMUtils()

Method Detail

dot

public static java.lang.String dot(java.lang.String s)

Replace all slashes with dots.

Parameters:

s - The string to replace

Returns:

The replaced string

slash

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

Replace all dots with slashes.

Parameters:

s - The string to replace

Returns:

The replaced string

getField

public static org.objectweb.asm.tree.FieldNode getField(org.objectweb.asm.tree.ClassNode classNode,
                                                        java.lang.String name,
                                                        @Nullable
                                                        java.lang.String desc)

Get a field from a class node.
The field is searched by its name and descriptor.

Parameters:

classNode - The class node to search in

name - The name of the field

desc - The descriptor of the field (null for any descriptor)

Returns:

The field node or null if no field was found

getMethod

public static org.objectweb.asm.tree.MethodNode getMethod(org.objectweb.asm.tree.ClassNode classNode,
                                                          java.lang.String name,
                                                          java.lang.String desc)

Get a method from a class node.
The method is searched by its name and descriptor.

Parameters:

classNode - The class node to search in

name - The name of the method

desc - The descriptor of the method

Returns:

The method node or null if no method was found

freeVarIndex

public static int freeVarIndex(org.objectweb.asm.tree.MethodNode methodNode)

Calculate the variable index of the first free variable in a method.

Parameters:

methodNode - The method to calculate the free variable index for

Returns:

The free variable index

castObjectTo

public static org.objectweb.asm.tree.InsnList castObjectTo(org.objectweb.asm.Type targetType)

Get the instructions to cast an object to a specific type.
Boxed types will be unboxed.

Parameters:

targetType - The target type

Returns:

The instructions to cast the object

boxPrimitive

@Nullable
public static org.objectweb.asm.tree.AbstractInsnNode boxPrimitive(org.objectweb.asm.Type primitive)

Get the instruction to box a primitive type.

Parameters:

primitive - The primitive type to box

Returns:

The instruction or null if the type is not a primitive type

toNumber

@Nullable
public static java.lang.Number toNumber(@Nullable
                                                   org.objectweb.asm.tree.AbstractInsnNode instruction)

Get the number the given instruction pushes onto the stack.

Parameters:

instruction - The instruction to get the number from

Returns:

The number or null if the instruction does not push a number onto the stack

intPush

public static org.objectweb.asm.tree.AbstractInsnNode intPush(int i)

Get the most optimal instruction to push the given integer onto the stack.

Parameters:

i - The integer to push

Returns:

The instruction to push the integer

longPush

public static org.objectweb.asm.tree.AbstractInsnNode longPush(long l)

Get the most optimal instruction to push the given long onto the stack.

Parameters:

l - The long to push

Returns:

The instruction to push the long

floatPush

public static org.objectweb.asm.tree.AbstractInsnNode floatPush(float f)

Get the most optimal instruction to push the given float onto the stack.

Parameters:

f - The float to push

Returns:

The instruction to push the float

doublePush

public static org.objectweb.asm.tree.AbstractInsnNode doublePush(double d)

Get the most optimal instruction to push the given double onto the stack.

Parameters:

d - The double to push

Returns:

The instruction to push the double

createEmptyClass

public static org.objectweb.asm.tree.ClassNode createEmptyClass(java.lang.String name)

Create a new empty class node.
An empty constructor will be added to the class.

Parameters:

name - The name of the class

Returns:

The created class node

parameterIndices

public static int[] parameterIndices(org.objectweb.asm.tree.MethodNode methodNode)

Calculate the indices of the parameters of a method.

Parameters:

methodNode - The method to calculate the indices for

Returns:

The indices of the parameters

swap

public static org.objectweb.asm.tree.InsnList swap(org.objectweb.asm.Type top,
                                                   org.objectweb.asm.Type bottom)

Get the instructions to swap the first two elements on the stack.

Parameters:

top - The type of the top element

bottom - The type of the bottom element

Returns:

The instructions to swap the elements

loadMethodArgs

public static org.objectweb.asm.tree.InsnList loadMethodArgs(org.objectweb.asm.tree.MethodNode method)

Get the instructions to load the arguments of a method onto the stack.

Parameters:

method - The method to load the arguments from

Returns:

The instructions to load the arguments

generateVariableName

public static java.lang.String generateVariableName(org.objectweb.asm.Type type,
                                                    java.util.function.Predicate<java.lang.String> doesExist)

Generate a variable name for a type that does not exist yet.

Parameters:

type - The type to generate the name for

doesExist - A predicate that checks if a name already exists (true if it exists)

Returns:

The generated name