Package net.bytebuddy.asm

Class Advice.AssignReturned.DefaultValueSkip

java.lang.Object

net.bytebuddy.asm.Advice.AssignReturned.DefaultValueSkip

All Implemented Interfaces:

StackManipulation

Enclosing class:

Advice.AssignReturned

@Enhance
protected static class Advice.AssignReturned.DefaultValueSkip
extends java.lang.Object
implements StackManipulation

A stack manipulation that applies a null-check on the returned value which indicates if an assignment should be skipped, if discovered.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	Advice.AssignReturned.DefaultValueSkip.Dispatcher	A dispatcher for skipping a default value.

Nested classes/interfaces inherited from interface net.bytebuddy.implementation.bytecode.StackManipulation

StackManipulation.AbstractBase, StackManipulation.Compound, StackManipulation.Illegal, StackManipulation.Simple, StackManipulation.Size, StackManipulation.Trivial

Field Summary

Fields

Modifier and Type	Field	Description
private Advice.AssignReturned.DefaultValueSkip.Dispatcher	dispatcher	The dispatcher to use.
private int	offset	The offset of the value of the returned type.
private StackManipulation	stackManipulation	The wrapped stack manipulation in case the value is not a default value.
private Advice.StackMapFrameHandler.ForPostProcessor	stackMapFrameHandler	The stack map frame handler to use.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DefaultValueSkip(StackManipulation stackManipulation, Advice.StackMapFrameHandler.ForPostProcessor stackMapFrameHandler, int offset, Advice.AssignReturned.DefaultValueSkip.Dispatcher dispatcher)	Creates a null-check wrapper.

Method Summary

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.
protected static StackManipulation	of(StackManipulation stackManipulation, Advice.StackMapFrameHandler.ForPostProcessor stackMapFrameHandler, int offset, TypeDefinition typeDefinition)	Resolves a skipping stack manipulation for the supplied type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

stackManipulation

private final StackManipulation stackManipulation

The wrapped stack manipulation in case the value is not a default value.

stackMapFrameHandler

private final Advice.StackMapFrameHandler.ForPostProcessor stackMapFrameHandler

The stack map frame handler to use.

offset

private final int offset

The offset of the value of the returned type.

dispatcher

private final Advice.AssignReturned.DefaultValueSkip.Dispatcher dispatcher

The dispatcher to use.

Constructor Detail

DefaultValueSkip

protected DefaultValueSkip(StackManipulation stackManipulation,
                           Advice.StackMapFrameHandler.ForPostProcessor stackMapFrameHandler,
                           int offset,
                           Advice.AssignReturned.DefaultValueSkip.Dispatcher dispatcher)

Creates a null-check wrapper.

Parameters:

stackManipulation - The wrapped stack manipulation in case the value is not a default value.

stackMapFrameHandler - The stack map frame handler to use.

offset - The offset of the value of the returned type.

dispatcher - The dispatcher to use.

Method Detail

of

protected static StackManipulation of(StackManipulation stackManipulation,
                                      Advice.StackMapFrameHandler.ForPostProcessor stackMapFrameHandler,
                                      int offset,
                                      TypeDefinition typeDefinition)

Resolves a skipping stack manipulation for the supplied type.

Parameters:

stackManipulation - The stack manipulation to wrap.

stackMapFrameHandler - The stack map frame handler to use.

offset - The offset of the value of the returned type.

typeDefinition - The type that is returned by the advice method.

Returns:

A suitable stack manipulation.

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.