Enum Duplication

java.lang.Object
java.lang.Enum<Duplication>
net.bytebuddy.implementation.bytecode.Duplication
All Implemented Interfaces:
Serializable, Comparable<Duplication>, java.lang.constant.Constable, StackManipulation
public enum Duplication extends Enum<Duplication> implements StackManipulation
Duplicates a value that is lying on top of the stack.

  • Enum Constant Details

    • ZERO

      public static final Duplication ZERO
      A duplication of no values. This corresponds a no-op instruction.

    • SINGLE

      public static final Duplication SINGLE
      A duplication of a single-sized stack values.

    • DOUBLE

      public static final Duplication DOUBLE
      A duplication of a double-sized stack value.

  • Field Details

    • size

      protected final StackManipulation.Size size
      The size representing the impact of applying the duplication onto the operand stack.

    • opcode

      private final int opcode
      The opcode that represents the manipulation.

  • Constructor Details

    • Duplication

      private Duplication(StackSize stackSize, int opcode)
      Creates a new duplication.
      Parameters:
      stackSize - The size representing the impact of applying the duplication onto the operand stack.
      opcode - The opcode that represents the manipulation.

  • Method Details

    • values

      public static Duplication[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared

    • valueOf

      public static Duplication valueOf(String name)
      Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null

    • of

      public static Duplication of(TypeDefinition typeDefinition)
      Duplicates a value given its type.
      Parameters:
      typeDefinition - The type to be duplicated.
      Returns:
      A stack manipulation that duplicates the given type.

    • flipOver

      public abstract StackManipulation flipOver(TypeDefinition typeDefinition)
      Creates a duplication that flips the stack's top value over the second stack element.
      Parameters:
      typeDefinition - The type of the second element on the operand stack.
      Returns:
      A stack manipulation that represents such a duplication flip.

    • isValid

      public boolean isValid()
      Determines if this stack manipulation is valid.
      Specified by:
      isValid in interface StackManipulation
      Returns:
      If false, this manipulation cannot be applied and should throw an exception.

    • apply

      public StackManipulation.Size apply(org.objectweb.asm.MethodVisitor methodVisitor, Implementation.Context implementationContext)
      Applies the stack manipulation that is described by this instance.
      Specified by:
      apply in interface StackManipulation
      Parameters:
      methodVisitor - The method visitor used to write the method implementation to.
      implementationContext - The context of the current implementation.
      Returns:
      The changes to the size of the operand stack that are implied by this stack manipulation.