OpenJDK 27 · jdk.internal.classfile.components.CodeRelabeler

A code relabeler is a CodeTransform replacing all occurrences of java.lang.classfile.Label in the transformed code with new instances. All java.lang.classfile.instruction.LabelTarget instructions are adjusted accordingly. Relabeled code graph is identical to the original.

Primary purpose of CodeRelabeler is for repeated injections of the same code blocks. Repeated injection of the same code block must be relabeled, so each instance of java.lang.classfile.Label is bound in the target bytecode exactly once.

Field Summary

Inherited from java.lang.classfile.CodeTransform:: ACCEPT_ALL

Method Summary

Modifier and Type	Method and Description
public static CodeRelabeler	Returns: a new instance of CodeRelabeler of() Creates a new instance of CodeRelabeler.
public static CodeRelabeler	Returns: a new instance of CodeRelabeler of(Map<Label, Label> label map actively used for relabeling map) Creates a new instance of CodeRelabeler storing the label mapping into the provided map.
public static CodeRelabeler	Returns: a new instance of CodeRelabeler of(BiFunction<Label, CodeBuilder, Label> function for remapping labels in the source code model mapFunction) Creates a new instance of CodeRelabeler using provided `java.util.function.BiFunction` to re-label the code.

Inherited from java.lang.classfile.CodeTransform:: andThen endHandler ofStateful

Method Detail

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public static CodeRelabeler of() Creates a new instance of CodeRelabeler. Returns:CodeRelabeler a new instance of CodeRelabeler

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public static CodeRelabeler of()

Creates a new instance of CodeRelabeler.

Returns:CodeRelabeler: a new instance of CodeRelabeler

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public static CodeRelabeler of(Map<Label, Label> map) Creates a new instance of CodeRelabeler storing the label mapping into the provided map. Parameters map:Map<Label, Label> label map actively used for relabeling Returns:CodeRelabeler a new instance of CodeRelabeler

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public static CodeRelabeler of(Map<Label, Label> map)

Creates a new instance of CodeRelabeler storing the label mapping into the provided map.

Parameters

map:Map<Label, Label>: label map actively used for relabeling

Returns:CodeRelabeler

a new instance of CodeRelabeler

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public static CodeRelabeler of(BiFunction<Label, CodeBuilder, Label> mapFunction) Creates a new instance of CodeRelabeler using provided `java.util.function.BiFunction` to re-label the code. Parameters mapFunction:BiFunction<Label, CodeBuilder, Label> function for remapping labels in the source code model Returns:CodeRelabeler a new instance of CodeRelabeler

public static CodeRelabeler of(BiFunction<Label, CodeBuilder, Label> mapFunction)

Creates a new instance of CodeRelabeler using provided java.util.function.BiFunction to re-label the code.