net.bytebuddy.implementation.bytecode

Class StackManipulation.Size

java.lang.Object

net.bytebuddy.implementation.bytecode.StackManipulation.Size

Enclosing interface:

StackManipulation

@HashCodeAndEqualsPlugin.Enhance
public static class StackManipulation.Size
extends java.lang.Object

A description of the size change that is imposed by some StackManipulation.

Field Summary

Fields

Modifier and Type	Field and Description
private int	maximalSize The maximal size of stack slots this stack manipulation ever requires.
private int	sizeImpact The impact of any size operation onto the operand stack.

Constructor Summary

Constructors

Constructor and Description
Size(int sizeImpact, int maximalSize) Creates an immutable descriptor of the size change that is implied by some stack manipulation.

Method Summary

Modifier and Type	Method and Description
private StackManipulation.Size	aggregate(int sizeChange, int interimMaximalSize) Aggregates a size change with this stack manipulation size.
StackManipulation.Size	aggregate(StackManipulation.Size other) Concatenates this size representation with another size representation in order to represent the size change that is represented by both alterations of the operand stack size.
int	getMaximalSize() Returns the maximal interim size of the operand stack that is represented by this instance.
int	getSizeImpact() Returns the size change on the operand stack that is represented by this instance.

Methods inherited from class java.lang.Object

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

Field Detail

sizeImpact

private final int sizeImpact

The impact of any size operation onto the operand stack. This value can be negative if more values were consumed from the stack than added to it.

maximalSize

private final int maximalSize

The maximal size of stack slots this stack manipulation ever requires. If an operation for example pushes five values onto the stack and subsequently consumes three operations, this value should still be five to express that a stack operation requires at least five slots in order to be applicable.

Constructor Detail

Size

public Size(int sizeImpact,
            int maximalSize)

Creates an immutable descriptor of the size change that is implied by some stack manipulation.

Parameters:

sizeImpact - The change of the size of the operand stack that is implied by some stack manipulation.

maximalSize - The maximal stack size that is required for executing this stack manipulation. Should never be negative number.

Method Detail

getSizeImpact

public int getSizeImpact()

Returns the size change on the operand stack that is represented by this instance.

Returns:

The size change on the operand stack that is represented by this instance.

getMaximalSize

public int getMaximalSize()

Returns the maximal interim size of the operand stack that is represented by this instance.

Returns:

The maximal interim size of the operand stack that is represented by this instance.

aggregate

public StackManipulation.Size aggregate(StackManipulation.Size other)

Concatenates this size representation with another size representation in order to represent the size change that is represented by both alterations of the operand stack size.

Parameters:

other - The other size representation.

Returns:

A new size representation representing both stack size requirements.

aggregate

private StackManipulation.Size aggregate(int sizeChange,
                                         int interimMaximalSize)

Aggregates a size change with this stack manipulation size.

Parameters:

sizeChange - The change in size the other operation implies.

interimMaximalSize - The interim maximal size of the operand stack that the other operation requires at least to function.

Returns:

The aggregated size.