Package org.antlr.v4.runtime.atn

Class ConcurrentIntIntMapView

java.lang.Object

java.util.AbstractMap<Integer,Integer>

org.antlr.v4.runtime.atn.ConcurrentIntIntMapView

All Implemented Interfaces:

ConcurrentMap<Integer,Integer>, Map<Integer,Integer>

final class ConcurrentIntIntMapView
extends AbstractMap<Integer,Integer>
implements ConcurrentMap<Integer,Integer>

JDK ConcurrentMap view over ConcurrentIntIntMap.

Preserves the historical protected ConcurrentMap<Integer,Integer> surface on ATN.LL1Table for subclasses and tests, while the prediction hot path reads/writes the primitive map without boxing. Mutating this view updates the same underlying store.

Entry, key, and value views are backed by the live primitive store: size(), isEmpty(), entrySet(), AbstractMap.keySet(), and AbstractMap.values() stay consistent with each other. Iterators walk an immutable snapshot of the published COW table (weakly consistent under concurrent writers, matching typical concurrent-map expectations for bulk views). Atomic single-key mutations (put(java.lang.Integer, java.lang.Integer), putIfAbsent(java.lang.Integer, java.lang.Integer), remove(java.lang.Object), replace(java.lang.Integer, java.lang.Integer, java.lang.Integer)) delegate to monitor-guarded operations on ConcurrentIntIntMap.

Null keys and null values are rejected (NullPointerException), matching ConcurrentHashMap and the LL(1) domain (alternatives are always ≥ 1).

Package-private; not part of any public API surface. HPPC types never appear in this class's signatures.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private final class	ConcurrentIntIntMapView.EntryIterator	Snapshot iterator over interleaved key/value pairs.
private final class	ConcurrentIntIntMapView.EntrySet	Live entry-set view.
private final class	ConcurrentIntIntMapView.LiveEntry	Map entry that writes ConcurrentIntIntMapView.LiveEntry.setValue(java.lang.Integer) through to the primitive store.

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
private final ATN	atn	Owning ATN when this view is ATN.LL1Table; null for standalone test instances.
private final ConcurrentIntIntMap	delegate
private Set<Map.Entry<Integer,Integer>>	entrySet	Lazily created entry-set view.

Constructor Summary

Constructors

Modifier	Constructor	Description
(package private)	ConcurrentIntIntMapView(ATN atn)
private	ConcurrentIntIntMapView(ATN atn, ConcurrentIntIntMap delegate)
(package private)	ConcurrentIntIntMapView(ConcurrentIntIntMap delegate)

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<Integer,Integer>>	entrySet()
Integer	get(Object key)
boolean	isEmpty()
Integer	put(Integer key, Integer value)
Integer	putIfAbsent(Integer key, Integer value)
Integer	remove(Object key)
boolean	remove(Object key, Object value)
Integer	replace(Integer key, Integer value)
boolean	replace(Integer key, Integer oldValue, Integer newValue)
private static void	requireKeyValue(Integer key, Integer value)
int	size()
private void	syncDense(int packedKey, int alt)

Methods inherited from class java.util.AbstractMap

clone, equals, hashCode, keySet, putAll, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.concurrent.ConcurrentMap

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, replaceAll

Methods inherited from interface java.util.Map

equals, hashCode, keySet, putAll, values

Field Details

delegate

private final ConcurrentIntIntMap delegate

atn

private final ATN atn

Owning ATN when this view is ATN.LL1Table; null for standalone test instances. Dense LL(1) writes go through ATN.syncLl1Dense(int, int).

entrySet

private transient Set<Map.Entry<Integer,Integer>> entrySet

Lazily created entry-set view. Stateless wrapper over delegate; safe to publish once.

Constructor Details

ConcurrentIntIntMapView

ConcurrentIntIntMapView(ConcurrentIntIntMap delegate)

ConcurrentIntIntMapView

ConcurrentIntIntMapView(ATN atn)

ConcurrentIntIntMapView

private ConcurrentIntIntMapView(ATN atn,
 ConcurrentIntIntMap delegate)

Method Details

syncDense

private void syncDense(int packedKey,
 int alt)

get

public Integer get(Object key)

Specified by:

get in interface Map<Integer,Integer>

Overrides:

get in class AbstractMap<Integer,Integer>

put

public Integer put(Integer key,
 Integer value)

Specified by:

put in interface Map<Integer,Integer>

Overrides:

put in class AbstractMap<Integer,Integer>

remove

public Integer remove(Object key)

Specified by:

remove in interface Map<Integer,Integer>

Overrides:

remove in class AbstractMap<Integer,Integer>

clear

public void clear()

Specified by:

clear in interface Map<Integer,Integer>

Overrides:

clear in class AbstractMap<Integer,Integer>

size

public int size()

Specified by:

size in interface Map<Integer,Integer>

Overrides:

size in class AbstractMap<Integer,Integer>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Integer,Integer>

Overrides:

isEmpty in class AbstractMap<Integer,Integer>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<Integer,Integer>

Overrides:

containsKey in class AbstractMap<Integer,Integer>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<Integer,Integer>

Overrides:

containsValue in class AbstractMap<Integer,Integer>

putIfAbsent

public Integer putIfAbsent(Integer key,
 Integer value)

Specified by:

putIfAbsent in interface ConcurrentMap<Integer,Integer>

Specified by:

putIfAbsent in interface Map<Integer,Integer>

remove

public boolean remove(Object key,
 Object value)

Specified by:

remove in interface ConcurrentMap<Integer,Integer>

Specified by:

remove in interface Map<Integer,Integer>

replace

public boolean replace(Integer key,
 Integer oldValue,
 Integer newValue)

Specified by:

replace in interface ConcurrentMap<Integer,Integer>

Specified by:

replace in interface Map<Integer,Integer>

replace

public Integer replace(Integer key,
 Integer value)

Specified by:

replace in interface ConcurrentMap<Integer,Integer>

Specified by:

replace in interface Map<Integer,Integer>

entrySet

public Set<Map.Entry<Integer,Integer>> entrySet()

Specified by:

entrySet in interface Map<Integer,Integer>

Specified by:

entrySet in class AbstractMap<Integer,Integer>

requireKeyValue

private static void requireKeyValue(Integer key,
 Integer value)