Interface CodeTransform

All Superinterfaces:

ClassFileTransform<CodeTransform, CodeElement, CodeBuilder>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public non-sealed interface CodeTransform
extends ClassFileTransform<CodeTransform, CodeElement, CodeBuilder>

A transformation on streams of CodeElement. The stream can come from a CodeModel, or a handler to a CodeBuilder as in CodeBuilder.transforming(CodeTransform, Consumer).

Refer to ClassFileTransform for general guidance and caution around the use of transforms for structures in the class file format.

A code transform can be lifted to a method or a class transform via MethodTransform.transformingCode(CodeTransform) and ClassTransform.transformingMethodBodies(CodeTransform), transforming only the CodeModel within those structures and passing all other elements to the builders.

Since:

24

See Also:

• CodeModel
• MethodBuilder.transformCode(CodeModel, CodeTransform)
• CodeBuilder.transforming(CodeTransform, Consumer)

Field Summary

Fields

Modifier and Type	Field	Description
static final CodeTransform	ACCEPT_ALL	A code transform that passes all elements to the builder.

Method Summary

Modifier and Type	Method	Description
default CodeTransform	andThen(CodeTransform t)	Chain this transform with another; elements presented to the builder of this transform will become the input to the next transform.
static CodeTransform	endHandler(Consumer<CodeBuilder> finisher)	Creates a code transform that passes each element through to the builder, and calls the specified function when transformation is complete.
static CodeTransform	ofStateful(Supplier<CodeTransform> supplier)	Creates a stateful code transform from a Supplier.

Methods declared in interface ClassFileTransform

accept, atEnd, atStart

Modifier and Type	Method	Description
void	accept(CodeBuilder builder, CodeElement element)	Transform an element by taking the appropriate actions on the builder.
default void	atEnd(CodeBuilder builder)	Take any final action during transformation of a classfile entity.
default void	atStart(CodeBuilder builder)	Take any preliminary action during transformation of a classfile entity.

Field Details

ACCEPT_ALL

static final CodeTransform ACCEPT_ALL

A code transform that passes all elements to the builder.

Method Details

ofStateful

static CodeTransform ofStateful(Supplier<CodeTransform> supplier)

Creates a stateful code transform from a Supplier. The supplier will be invoked for each transformation.

Parameters:

supplier - a Supplier that produces a fresh transform object for each traversal

Returns:

the stateful code transform

endHandler

static CodeTransform endHandler(Consumer<CodeBuilder> finisher)

Creates a code transform that passes each element through to the builder, and calls the specified function when transformation is complete.

Parameters:

finisher - the function to call when transformation is complete

Returns:

the code transform

andThen

default CodeTransform andThen(CodeTransform t)

Description copied from interface: ClassFileTransform

Chain this transform with another; elements presented to the builder of this transform will become the input to the next transform.

This method is implemented by the Class-File API. Users usually don't have sufficient access to Class-File API functionalities to override this method correctly for generic downstream transforms.

Specified by:

andThen in interface ClassFileTransform<CodeTransform, CodeElement, CodeBuilder>

Implementation Requirements:

The default implementation returns this code transform chained with another code transform from the argument. Chaining of two transforms requires to involve a chained builder serving as a target builder for this transform and also as a source of elements for the downstream transform.

Parameters:

t - the downstream transform

Returns:

the chained transform