Package org.codehaus.jackson.util
Class InternCache
- java.lang.Object
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- java.util.AbstractMap<K,V>
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- java.util.HashMap<K,V>
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- java.util.LinkedHashMap<String,String>
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- org.codehaus.jackson.util.InternCache
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- All Implemented Interfaces:
Serializable
,Cloneable
,Map<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
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Nested Class Summary
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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>
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Field Summary
Fields Modifier and Type Field Description static InternCache
instance
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String
intern(String input)
protected boolean
removeEldestEntry(Map.Entry<String,String> eldest)
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Methods inherited from class java.util.LinkedHashMap
clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, replaceAll, values
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Methods inherited from class java.util.HashMap
clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size
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Methods inherited from class java.util.AbstractMap
equals, hashCode, toString
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Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size
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Field Detail
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instance
public static final InternCache instance
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Method Detail
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removeEldestEntry
protected boolean removeEldestEntry(Map.Entry<String,String> eldest)
- Overrides:
removeEldestEntry
in classLinkedHashMap<String,String>
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