Package org.apache.wicket.util.collections

Class MicroMap<K,​V>

  • Type Parameters:
    K - Key type
    V - Value type
    All Implemented Interfaces:
    java.io.Serializable, java.util.Map<K,​V>
    public final class MicroMap<K,​V>
extends java.lang.Object
implements java.util.Map<K,​V>, java.io.Serializable
    An implementation of the java.util.Map interface which can only hold a single object. This is particularly useful to control memory usage in Wicket because many containers hold only a single component.
    Author:
    Jonathan Locke
    See Also:
    Serialized Form

    • Nested Class Summary

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

        java.util.Map.Entry<K extends java.lang.Object,​V extends java.lang.Object>

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static int MAX_ENTRIES
      The maximum number of entries this map supports.

    • Constructor Summary

      Constructors 
      Constructor Description
      MicroMap()
      Constructor
      MicroMap​(K key, V value)
      Constructs map with a single key and value pair.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void clear()  
      boolean containsKey​(java.lang.Object key)  
      boolean containsValue​(java.lang.Object value)  
      java.util.Set<java.util.Map.Entry<K,​V>> entrySet()  
      V get​(java.lang.Object key)  
      boolean isEmpty()  
      boolean isFull()  
      java.util.Set<K> keySet()  
      V put​(K key, V value)  
      void putAll​(java.util.Map<? extends K,​? extends V> map)  
      V remove​(java.lang.Object key)  
      int size()  
      java.util.Collection<V> values()  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

      • Methods inherited from interface java.util.Map

        compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

    • Field Detail

      • MAX_ENTRIES

        public static final int MAX_ENTRIES
        The maximum number of entries this map supports.
        See Also:
        Constant Field Values

    • Constructor Detail

      • MicroMap

        public MicroMap()
        Constructor

      • MicroMap

        public MicroMap​(K key,
                V value)
        Constructs map with a single key and value pair.
        Parameters:
        key - The key
        value - The value

    • Method Detail

      • isFull

        public boolean isFull()
        Returns:
        True if this MicroMap is full

      • size

        public int size()
        Specified by:
        size in interface java.util.Map<K,​V>
        See Also:
        Map.size()

      • isEmpty

        public boolean isEmpty()
        Specified by:
        isEmpty in interface java.util.Map<K,​V>
        See Also:
        Map.isEmpty()

      • containsKey

        public boolean containsKey​(java.lang.Object key)
        Specified by:
        containsKey in interface java.util.Map<K,​V>
        See Also:
        Map.containsKey(java.lang.Object)

      • containsValue

        public boolean containsValue​(java.lang.Object value)
        Specified by:
        containsValue in interface java.util.Map<K,​V>
        See Also:
        Map.containsValue(java.lang.Object)

      • get

        public V get​(java.lang.Object key)
        Specified by:
        get in interface java.util.Map<K,​V>
        See Also:
        Map.get(java.lang.Object)

      • put

        public V put​(K key,
             V value)
        Specified by:
        put in interface java.util.Map<K,​V>
        See Also:
        Map.put(java.lang.Object, java.lang.Object)

      • remove

        public V remove​(java.lang.Object key)
        Specified by:
        remove in interface java.util.Map<K,​V>
        See Also:
        Map.remove(java.lang.Object)

      • putAll

        public void putAll​(java.util.Map<? extends K,​? extends V> map)
        Specified by:
        putAll in interface java.util.Map<K,​V>
        See Also:
        Map.putAll(java.util.Map)

      • clear

        public void clear()
        Specified by:
        clear in interface java.util.Map<K,​V>
        See Also:
        Map.clear()

      • keySet

        public java.util.Set<K> keySet()
        Specified by:
        keySet in interface java.util.Map<K,​V>
        See Also:
        Map.keySet()

      • values

        public java.util.Collection<V> values()
        Specified by:
        values in interface java.util.Map<K,​V>
        See Also:
        Map.values()

      • entrySet

        public java.util.Set<java.util.Map.Entry<K,​V>> entrySet()
        Specified by:
        entrySet in interface java.util.Map<K,​V>
        See Also:
        Map.entrySet()