net.bytebuddy.asm

Class Advice.AssignReturned.NullCheck

java.lang.Object

net.bytebuddy.asm.Advice.AssignReturned.NullCheck

All Implemented Interfaces:

StackManipulation

Enclosing class:

Advice.AssignReturned

@HashCodeAndEqualsPlugin.Enhance
protected static class Advice.AssignReturned.NullCheck
extends 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/interfaces inherited from interface net.bytebuddy.implementation.bytecode.StackManipulation

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

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullCheck(StackManipulation stackManipulation, int offset) Creates a null-check wrapper.

Method Summary

Modifier and Type	Method and 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.

Methods inherited from class java.lang.Object

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

Constructor Detail

NullCheck

protected NullCheck(StackManipulation stackManipulation,
                    int offset)

Creates a null-check wrapper.

Parameters:

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

offset - The offset of the value to check for being null.

Method Detail

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.