Package net.bytebuddy.implementation.bytecode.constant

Enum Class IntegerConstant

java.lang.Object
java.lang.Enum<IntegerConstant>
net.bytebuddy.implementation.bytecode.constant.IntegerConstant
All Implemented Interfaces:
Serializable, Comparable<IntegerConstant>, Constable, StackManipulation
public enum IntegerConstant extends Enum<IntegerConstant> implements StackManipulation
This class is responsible for loading any int constant onto the operand stack. Note that within the JVM, boolean, byte, short and char values are represented by integers and can therefore be loaded by using this class.

  • Enum Constant Details

    • MINUS_ONE

      public static final IntegerConstant MINUS_ONE
      A JVM-type int constant of value -1.

    • ZERO

      public static final IntegerConstant ZERO
      A JVM-type int constant of value 0.

    • ONE

      public static final IntegerConstant ONE
      A JVM-type int constant of value 1.

    • TWO

      public static final IntegerConstant TWO
      A JVM-type int constant of value 2.

    • THREE

      public static final IntegerConstant THREE
      A JVM-type int constant of value 3.

    • FOUR

      public static final IntegerConstant FOUR
      A JVM-type int constant of value 4.

    • FIVE

      public static final IntegerConstant FIVE
      A JVM-type int constant of value 5.

  • Field Details

    • SIZE

      private static final StackManipulation.Size SIZE
      The size impact of loading an int value onto the operand stack.

    • opcode

      private final int opcode
      The shortcut opcode for loading a common int-compatible JVM value onto the operand stack.

  • Constructor Details

    • IntegerConstant

      private IntegerConstant(int opcode)
      Creates a new JVM-integer constant loading stack manipulation for a given shortcut opcode.
      Parameters:
      opcode - The shortcut opcode for loading a common int-compatible JVM value onto the operand stack.

  • Method Details

    • values

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

    • valueOf

      public static IntegerConstant valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name
      NullPointerException - if the argument is null

    • forValue

      public static StackManipulation forValue(boolean value)
      Creates a stack manipulation for loading a boolean value onto the stack.
      Parameters:
      value - The boolean to load onto the stack.
      Returns:
      The stack manipulation for loading this boolean.

    • forValue

      public static StackManipulation forValue(int value)
      Creates a stack manipulation for loading an int value onto the stack.

       

      This is achieved either by invoking a constant opcode, if any, or by creating a binary push operation.
      Parameters:
      value - The int (or byte, short, char) value to load onto the stack.
      Returns:
      A stack manipulation for loading the given value.

    • 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.