Package net.neoforged.neoforge.coremods

Class ReplaceFieldComparisonWithInstanceOf

java.lang.Object

net.neoforged.neoforgespi.transformation.BaseSimpleProcessor

net.neoforged.neoforgespi.transformation.SimpleMethodProcessor

net.neoforged.neoforge.coremods.ReplaceFieldComparisonWithInstanceOf

All Implemented Interfaces:

ClassProcessor

public class ReplaceFieldComparisonWithInstanceOf
extends SimpleMethodProcessor

Replaces code such as itemstack.getItem() == Items.CROSSBOW with instanceof checks such as itemstack.getItem() instanceof CrossbowItem. This transformer targets a set of methods to replace the occurrence of a single field-comparison.

Nested Class Summary

Nested classes/interfaces inherited from class net.neoforged.neoforgespi.transformation.SimpleMethodProcessor

SimpleMethodProcessor.Target

Nested classes/interfaces inherited from interface net.neoforged.neoforgespi.transformation.ClassProcessor

ClassProcessor.AfterProcessingContext, ClassProcessor.ComputeFlags, ClassProcessor.LinkContext, ClassProcessor.OrderingHint, ClassProcessor.SelectionContext, ClassProcessor.TransformationContext

Field Summary

Fields

Modifier and Type	Field	Description
private final String	fieldName
private final String	fieldOwner
private static final org.slf4j.Logger	LOG
private final String	replacementClassName
private final Set<SimpleMethodProcessor.Target>	targets

Fields inherited from interface net.neoforged.neoforgespi.transformation.ClassProcessor

GENERATED_PACKAGE_MODULE

Constructor Summary

Constructors

Constructor	Description
ReplaceFieldComparisonWithInstanceOf(String fieldOwner, String fieldName, String replacementClassName, List<SimpleMethodProcessor.Target> methodsToScan)

Method Summary

Modifier and Type	Method	Description
ProcessorName	name()	Returns a unique identifier for this processor.
Set<SimpleMethodProcessor.Target>	targets()	Returns the methods targeted by this processor.
void	transform(org.objectweb.asm.tree.MethodNode methodNode, SimpleTransformationContext context)	Applies transformations to a targeted method.

Methods inherited from class net.neoforged.neoforgespi.transformation.SimpleMethodProcessor

handlesClass, processClass

Methods inherited from class net.neoforged.neoforgespi.transformation.BaseSimpleProcessor

afterProcessing, link, runsAfter

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.neoforged.neoforgespi.transformation.ClassProcessor

generatesPackages, orderingHint, runsBefore

Field Details

LOG

private static final org.slf4j.Logger LOG

targets

private final Set<SimpleMethodProcessor.Target> targets

fieldOwner

private final String fieldOwner

fieldName

private final String fieldName

replacementClassName

private final String replacementClassName

Constructor Details

ReplaceFieldComparisonWithInstanceOf

public ReplaceFieldComparisonWithInstanceOf(String fieldOwner,
 String fieldName,
 String replacementClassName,
 List<SimpleMethodProcessor.Target> methodsToScan)

Parameters:

fieldOwner - The class that owns fieldName

fieldName - The name of a field in fieldOwner

replacementClassName - Reference comparisons against fieldName in fieldOwner are replaced by instanceof checks against this class.

methodsToScan - The methods to scan

Method Details

name

public ProcessorName name()

Description copied from interface: ClassProcessor

Returns a unique identifier for this processor.

Returns:

a unique identifier for this processor

targets

public Set<SimpleMethodProcessor.Target> targets()

Description copied from class: SimpleMethodProcessor

Returns the methods targeted by this processor.

Specified by:

targets in class SimpleMethodProcessor

Returns:

the methods targeted by this processor

transform

public void transform(org.objectweb.asm.tree.MethodNode methodNode,
 SimpleTransformationContext context)

Description copied from class: SimpleMethodProcessor

Applies transformations to a targeted method.

Specified by:

transform in class SimpleMethodProcessor

Parameters:

methodNode - The ASM input node, which can be mutated directly