Package org.codehaus.jackson.util

Class 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 extends java.lang.Object,​V extends java.lang.Object>, java.util.AbstractMap.SimpleImmutableEntry<K extends java.lang.Object,​V extends java.lang.Object>

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method 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, entrySet, forEach, get, getOrDefault, keySet, replaceAll, values

      • Methods inherited from class java.util.HashMap

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

      • 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

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

    • Field Detail

    • 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)