org.jboss.byteman.rule.compiler
Class StackHeights

java.lang.Object
  org.jboss.byteman.rule.compiler.StackHeights

public class StackHeights
extends java.lang.Object

container to track either the current or the maximum local variable count and stack height while generating compiled code for a rule

Field Summary

int	localCount number of local variable slots
int	stackCount number of stack slots

Constructor Summary

StackHeights()
create withinitial counts 0

StackHeights(StackHeights toCopy)
create a copy with the same coutns as the original

Method Summary

StackHeights	addLocalCount(int increment) increment the local count and return this to allow chaining
StackHeights	addStackCount(int increment) increment the stack count and return this to allow chaining

Methods inherited from class java.lang.Object

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

Field Detail

stackCount

public int stackCount

number of stack slots

localCount

public int localCount

number of local variable slots

Constructor Detail

StackHeights

public StackHeights()

create withinitial counts 0

StackHeights

public StackHeights(StackHeights toCopy)

create a copy with the same coutns as the original

Parameters:

toCopy -

Method Detail

addStackCount

public StackHeights addStackCount(int increment)
                           throws CompileException

increment the stack count and return this to allow chaining

Parameters:

increment - the amount ot add to stackCount (can be negative)

Returns:

this

Throws:

CompileException - if the stack count goes negative

addLocalCount

public StackHeights addLocalCount(int increment)
                           throws CompileException

increment the local count and return this to allow chaining

Parameters:

increment - the amount ot add to localCount (can be negative)

Returns:

this

Throws:

CompileException - if the local count goes negative