Package org.codehaus.janino

Class CodeContext.Offset

java.lang.Object

org.codehaus.janino.CodeContext.Offset

Direct Known Subclasses:

CodeContext.BasicBlock, CodeContext.FourByteOffset, CodeContext.Inserter, CodeContext.LineNumberOffset

Enclosing class:

CodeContext

public class CodeContext.Offset
extends java.lang.Object

A class that represents an offset within a "Code" attribute.

The concept of an "offset" is that if one writes into the middle of a "Code" attribute, all offsets behind the insertion point are automatically shifted.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) CodeContext.Offset	next	Links to preceding and succeeding offsets.
(package private) int	offset	The offset in the code attribute that this object represents.
(package private) CodeContext.Offset	prev	Links to preceding and succeeding offsets.
private StackMap	stackMap
(package private) static int	UNSET	Special value for offset which indicates that this CodeContext.Offset has not yet been set()

Constructor Summary

Constructors

Constructor	Description
Offset()

Method Summary

Modifier and Type	Method	Description
CodeContext	getCodeContext()
StackMap	getStackMap()
void	set()	Sets this "Offset" to the offset of the current inserter; inserts this "Offset" before the current inserter.
void	setBasicBlock()	Set this offset, and mark it as the the beginning of a "basic block".
void	setOffset()
(package private) void	setStackMap()	Merges the stack maps of the current inserter and THIS offset, and assigns the result to the current inserter and THIS offset.
void	setStackMap(StackMap stackMap)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

offset

int offset

The offset in the code attribute that this object represents.

prev

@Nullable
CodeContext.Offset prev

Links to preceding and succeeding offsets. Both are null before set() is called, and both are non-null after set() has been called. This implies that set() must be invoked at most once.

next

@Nullable
CodeContext.Offset next

Links to preceding and succeeding offsets. Both are null before set() is called, and both are non-null after set() has been called. This implies that set() must be invoked at most once.

UNSET

static final int UNSET

Special value for offset which indicates that this CodeContext.Offset has not yet been set()

See Also:

Constant Field Values

stackMap

@Nullable
private StackMap stackMap

Constructor Detail

Offset

public Offset()

Method Detail

set

public void set()

Sets this "Offset" to the offset of the current inserter; inserts this "Offset" before the current inserter.

setBasicBlock

public void setBasicBlock()

Set this offset, and mark it as the the beginning of a "basic block".

setStackMap

void setStackMap()

Merges the stack maps of the current inserter and THIS offset, and assigns the result to the current inserter and THIS offset.

setOffset

public void setOffset()

getStackMap

public StackMap getStackMap()

setStackMap

public void setStackMap(StackMap stackMap)

getCodeContext

public final CodeContext getCodeContext()

Returns:

The CodeContext that this CodeContext.Offset belongs to

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object