Module org.glavo.classfile

Package org.glavo.classfile.impl

Class LabelImpl

java.lang.Object

org.glavo.classfile.impl.AbstractElement

org.glavo.classfile.impl.LabelImpl

All Implemented Interfaces:

ClassfileElement, CodeElement, LabelTarget, Label, PseudoInstruction

public final class LabelImpl
extends AbstractElement
implements Label, LabelTarget

Labels are created with a parent context, which is either a code attribute or a code builder. A label originating in a code attribute context may be reused in a code builder context, but only labels from a single code attribute may be reused by a single code builder. Mappings to and from BCI are the responsibility of the context in which it is used; a single word of mutable state is provided, for the exclusive use of the owning context. In practice, this means that labels created in a code attribute can simply store the BCI in the state on creation, and labels created in in a code builder can store the BCI in the state when the label is eventually set; if a code attribute label is reused in a builder, the original BCI can be used as an index into an array.

Constructor Summary

Constructors

Constructor	Description
LabelImpl(LabelContext labelContext, int bci)

Method Summary

Modifier and Type	Method	Description
int	getBCI()
Label	label()
LabelContext	labelContext()
void	setBCI(int bci)
String	toString()
void	writeTo(DirectCodeBuilder builder)

Methods inherited from class org.glavo.classfile.impl.AbstractElement

writeTo, writeTo, writeTo

Methods inherited from class java.lang.Object

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

Constructor Details

LabelImpl

public LabelImpl(LabelContext labelContext,
 int bci)

Method Details

labelContext

public LabelContext labelContext()

getBCI

public int getBCI()

setBCI

public void setBCI(int bci)

label

public Label label()

Specified by:

label in interface LabelTarget

writeTo

public void writeTo(DirectCodeBuilder builder)

Overrides:

writeTo in class AbstractElement

toString

public String toString()

Overrides:

toString in class Object