Package org.apache.openjpa.lib.util.collections

Class AbstractIterableMap<K,​V>

  • Type Parameters:
    K - the type of the keys in this map
    V - the type of the values in this map
    All Implemented Interfaces:
    java.util.Map<K,​V>, IterableMap<K,​V>
    Direct Known Subclasses:
    AbstractMapDecorator
    public abstract class AbstractIterableMap<K,​V>
extends java.lang.Object
implements IterableMap<K,​V>
    Provide a basic IterableMap implementation.
    Since:
    4.0

    • 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>

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      MapIterator<K,​V> mapIterator()
      Obtains a MapIterator over the map.

      • 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, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

    • Constructor Detail

      • AbstractIterableMap

        public AbstractIterableMap()

    • Method Detail

      • mapIterator

        public MapIterator<K,​V> mapIterator()
        Obtains a MapIterator over the map.

        A map iterator is an efficient way of iterating over maps. There is no need to access the entry set or use Map Entry objects. 

         IterableMap<String,Integer> map = new HashedMap<String,Integer>();
 MapIterator<String,Integer> it = map.mapIterator();
 while (it.hasNext()) {
   String key = it.next();
   Integer value = it.getValue();
   it.setValue(value + 1);
 }
        Specified by:
        mapIterator in interface IterableMap<K,​V>
        Returns:
        a map iterator