Interface ClassTransform

All Superinterfaces:
ClassFileTransform<ClassTransform, ClassElement, ClassBuilder>
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 ClassTransform extends ClassFileTransform<ClassTransform, ClassElement, ClassBuilder>
A transformation on streams of ClassElement.

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

Since:
24
See Also:

  • Field Details

    • ACCEPT_ALL

      static final ClassTransform ACCEPT_ALL
      A class transform that passes all elements to the builder.

  • Method Details

    • ofStateful

      static ClassTransform ofStateful(Supplier<ClassTransform> supplier)
      Creates a stateful class 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 class transform

    • endHandler

      static ClassTransform endHandler(Consumer<ClassBuilder> finisher)
      Creates a class 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 class transform

    • dropping

      static ClassTransform dropping(Predicate<ClassElement> filter)
      Creates a class transform that passes each element through to the builder, except for those that the supplied Predicate returns true for.
      Parameters:
      filter - the predicate that determines which elements to drop
      Returns:
      the class transform

    • transformingMethods

      static ClassTransform transformingMethods(Predicate<MethodModel> filter, MethodTransform xform)
      Creates a class transform that transforms MethodModel elements with the supplied method transform for methods that the supplied Predicate returns true for, passing other elements through to the builder.
      Parameters:
      filter - a predicate that determines which methods to transform
      xform - the method transform
      Returns:
      the class transform

    • transformingMethods

      static ClassTransform transformingMethods(MethodTransform xform)
      Creates a class transform that transforms MethodModel elements with the supplied method transform, passing other elements through to the builder.
      Parameters:
      xform - the method transform
      Returns:
      the class transform

    • transformingMethodBodies

      static ClassTransform transformingMethodBodies(Predicate<MethodModel> filter, CodeTransform xform)
      Creates a class transform that transforms the CodeAttribute (method body) of MethodModel elements with the supplied code transform for methods that the supplied Predicate returns true for, passing other elements through to the builder.
      Parameters:
      filter - a predicate that determines which methods to transform
      xform - the code transform
      Returns:
      the class transform

    • transformingMethodBodies

      static ClassTransform transformingMethodBodies(CodeTransform xform)
      Creates a class transform that transforms the CodeAttribute (method body) of MethodModel elements with the supplied code transform, passing other elements through to the builder.
      Parameters:
      xform - the code transform
      Returns:
      the class transform

    • transformingFields

      static ClassTransform transformingFields(FieldTransform xform)
      Creates a class transform that transforms FieldModel elements with the supplied field transform, passing other elements through to the builder.
      Parameters:
      xform - the field transform
      Returns:
      the class transform

    • andThen

      default ClassTransform andThen(ClassTransform 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<ClassTransform, ClassElement, ClassBuilder>
      Implementation Requirements:
      The default implementation returns this class transform chained with another class 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