Top Description Fields Constructors Methods

org.antlr.v4.runtime.atn

public Class PredictionContextCache

Class Inheritance

extends Object

java.lang.Object
org.antlr.v4.runtime.atn.PredictionContextCache

Imports

java.util.HashMap, .Map

Used to cache PredictionContext objects. Its used for the shared context cash associated with contexts in DFA states. This cache can be used for both lexers and parsers.

Field Summary

Modifier and Type	Field and Description
protected final Map<PredictionContext, PredictionContext>	cache

Constructor Summary

Access	Constructor and Description
public	PredictionContextCache()

Method Summary

Modifier and Type	Method and Description
public PredictionContext	add(PredictionContext ctx) Add a context to the cache and return it.
public PredictionContext	get(PredictionContext ctx)
public int	size()

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

cache	back to summary
protected final Map<PredictionContext, PredictionContext> cache

Constructor Detail

PredictionContextCache	back to summary
public PredictionContextCache()

Method Detail

add	back to summary
public PredictionContext add(PredictionContext ctx) Add a context to the cache and return it. If the context already exists, return that one instead and do not add a new context to the cache. Protect shared cache from unsafe thread access.

get	back to summary
public PredictionContext get(PredictionContext ctx)

size	back to summary
public int size()