Enum Duplication
- java.lang.Object
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- java.lang.Enum<Duplication>
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- net.bytebuddy.implementation.bytecode.Duplication
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<Duplication>
,StackManipulation
public enum Duplication extends java.lang.Enum<Duplication> implements StackManipulation
Duplicates a value that is lying on top of the stack.
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Nested Class Summary
Nested Classes Modifier and Type Class Description protected static class
Duplication.WithFlip
A duplication that flips a value over the second value on the operand stack.-
Nested classes/interfaces inherited from interface net.bytebuddy.implementation.bytecode.StackManipulation
StackManipulation.Compound, StackManipulation.Illegal, StackManipulation.Size, StackManipulation.Trivial
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Field Summary
Fields Modifier and Type Field Description private int
opcode
The opcode that represents the manipulation.protected StackManipulation.Size
size
The size representing the impact of applying the duplication onto the operand stack.
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Constructor Summary
Constructors Modifier Constructor Description private
Duplication(StackSize stackSize, int opcode)
Creates a new duplication.
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description StackManipulation.Size
apply(org.objectweb.asm.MethodVisitor methodVisitor, Implementation.Context implementationContext)
Applies the stack manipulation that is described by this instance.abstract StackManipulation
flipOver(TypeDefinition typeDefinition)
Creates a duplication that flips the stack's top value over the second stack element.boolean
isValid()
Determines if this stack manipulation is valid.static Duplication
of(TypeDefinition typeDefinition)
Duplicates a value given its type.static Duplication
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.static Duplication[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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ZERO
public static final Duplication ZERO
A duplication of no values. This corresponds a no-op instruction.
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SINGLE
public static final Duplication SINGLE
A duplication of a single-sized stack values.
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DOUBLE
public static final Duplication DOUBLE
A duplication of a double-sized stack value.
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Field Detail
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size
protected final StackManipulation.Size size
The size representing the impact of applying the duplication onto the operand stack.
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opcode
private final int opcode
The opcode that represents the manipulation.
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Constructor Detail
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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.
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Method Detail
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values
public static Duplication[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:for (Duplication c : Duplication.values()) System.out.println(c);
- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
public static Duplication valueOf(java.lang.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:
java.lang.IllegalArgumentException
- if this enum type has no constant with the specified namejava.lang.NullPointerException
- if the argument is null
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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.
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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.
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isValid
public boolean isValid()
Determines if this stack manipulation is valid.- Specified by:
isValid
in interfaceStackManipulation
- Returns:
- If
false
, this manipulation cannot be applied and should throw an exception.
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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 interfaceStackManipulation
- 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.
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