org.codehaus.jackson.util

Class InternCache

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<java.lang.String,java.lang.String>

org.codehaus.jackson.util.InternCache

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<java.lang.String,java.lang.String>

public final class InternCache
extends java.util.LinkedHashMap<java.lang.String,java.lang.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 java.util.AbstractMap

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

Field Summary

Fields

Modifier and Type	Field and Description
static InternCache	instance

Method Summary

Methods

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

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, get

Methods inherited from class java.util.HashMap

clone, containsKey, entrySet, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

containsKey, entrySet, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Field Detail

instance

public static final InternCache instance

Method Detail

removeEldestEntry

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

Overrides:

removeEldestEntry in class java.util.LinkedHashMap<java.lang.String,java.lang.String>

intern

public java.lang.String intern(java.lang.String input)