Class InternCache

java.lang.Object

java.util.AbstractMap<String,String>

java.util.HashMap<String,String>

java.util.LinkedHashMap<String,String>

org.codehaus.jackson.util.InternCache

All Implemented Interfaces:

Serializable, Cloneable, Map<String,String>, SequencedMap<String,String>

public final class InternCache
extends LinkedHashMap<String,String>

Singleton class that adds a simple first-level cache in front of regular String.intern() functionality. This is done as a minor performance optimization, to avoid calling native intern() method in cases where same String is being interned multiple times.

Note: that this class extends LinkedHashMap is an implementation detail -- no code should ever directly call Map methods.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class AbstractMap

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

Field Summary

Fields

Modifier and Type	Field	Description
static final InternCache	instance

Method Summary

Modifier and Type	Method	Description
String	intern(String input)
protected boolean	removeEldestEntry(Map.Entry<String,String> eldest)

Methods inherited from class LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, newLinkedHashMap, putFirst, putLast, replaceAll, reversed, sequencedEntrySet, sequencedKeySet, sequencedValues, values

Methods inherited from class HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, newHashMap, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class AbstractMap

equals, hashCode, toString

Methods inherited from class Object

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

Methods inherited from interface Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from interface SequencedMap

firstEntry, lastEntry, pollFirstEntry, pollLastEntry

Field Details

instance

public static final InternCache instance

Method Details

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<String,String> eldest)

Overrides:

removeEldestEntry in class LinkedHashMap<String,String>

intern

public String intern(String input)