Enum NullConstant
- java.lang.Object
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- java.lang.Enum<NullConstant>
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- net.bytebuddy.implementation.bytecode.constant.NullConstant
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<NullConstant>
,StackManipulation
public enum NullConstant extends java.lang.Enum<NullConstant> implements StackManipulation
Represents a stack manipulation to load anull
pointer onto the operand stack.
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Nested Class Summary
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Nested classes/interfaces inherited from interface net.bytebuddy.implementation.bytecode.StackManipulation
StackManipulation.Compound, StackManipulation.Illegal, StackManipulation.Size, StackManipulation.Trivial
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Enum Constant Summary
Enum Constants Enum Constant Description INSTANCE
The singleton instance.
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Field Summary
Fields Modifier and Type Field Description private StackManipulation.Size
size
The size impact of loading thenull
reference onto the operand stack.
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Constructor Summary
Constructors Modifier Constructor Description private
NullConstant(StackSize size)
Creates a null constant.
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Method Summary
All Methods Static Methods Instance 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.boolean
isValid()
Determines if this stack manipulation is valid.static NullConstant
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.static NullConstant[]
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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INSTANCE
public static final NullConstant INSTANCE
The singleton instance.
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Field Detail
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size
private final StackManipulation.Size size
The size impact of loading thenull
reference onto the operand stack.
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Constructor Detail
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NullConstant
private NullConstant(StackSize size)
Creates a null constant.- Parameters:
size
- The size of the constant on the operand stack.
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Method Detail
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values
public static NullConstant[] 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 (NullConstant c : NullConstant.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 NullConstant 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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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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