Examples of org.apache.commons.collections15.multimap.MultiHashMap

Package org.apache.commons.collections15.multimap

Examples of org.apache.commons.collections15.multimap.MultiHashMap

org.apache.commons.collections15.multimap.MultiHashMap
MultiHashMap is the default implementation of the {@link org.apache.commons.collections15.MultiMap MultiMap} interface.
A MultiMap is like a Map, but with slightly different semantics. Putting a value into the map will add the value to a Collection at that key. Getting a value will return a Collection, holding all the values put to that key.
This implementation uses an ArrayList as the collection. The internal storage list is made available without cloning via the get(Object) and entrySet() methods. The implementation returns null when there are no values mapped to a key.
For example:
```
 Number key = new Integer(5); MultiMap<Number,String> mhm = new MultiHashMap<Number,String>(); mhm.put(key, "A"); mhm.put(key, "B"); mhm.put(key, "C"); Collection<String> coll = mhm.get(key);
```
list will be a list containing "A", "B", "C". @author Christopher Berry @author James Strachan @author Steve Downey @author Stephen Colebourne @author Julien Buret @author Matt Hall, John Watkinson, Serhiy Yevtushenko @version $Revision: 1.2 $ $Date: 2006/06/08 15:19:55 $ @since Commons Collections 2.0

      else if (object instanceof List)
         return (List) object;
      else if (object instanceof Collection)
         return new ArrayList((Collection)object);
      else if (object.getClass().isArray())
         return toList(new ArrayIterator(object), context);
      else
         return Arrays.asList( object);
         
   }

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      if (object == null)
         return EmptyIterator.getInstance();
      else if (object instanceof Iterator)
         return (Iterator) object;
      else if (object instanceof Enumeration)
         return new EnumerationIterator( (Enumeration) object);
      else if (object instanceof Collection)
         return ((Collection)object).iterator();
      else if (object.getClass().isArray())
         return new ArrayIterator(object);
      else

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   }


   public Enumeration toEnumeration(Object objects, InvocationContext context)
   {
      return new IteratorEnumeration(toIterator(objects, context));
   }

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      else if (object instanceof Collection)
         return ((Collection)object).iterator();
      else if (object.getClass().isArray())
         return new ArrayIterator(object);
      else
         return new SingletonIterator(object);
   }

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  @SuppressWarnings("unchecked")
  private List<InfoSaison> preMergeInfosSaison(
      final List<InfoSaison> infosSaison1,
      final List<InfoSaison> infosSaison2)
  {
    final MultiKeyMap mkMap = new MultiKeyMap();


    preMergeInfosSaison(infosSaison1, mkMap);
    preMergeInfosSaison(infosSaison2, mkMap);


    return new Vector<InfoSaison>(mkMap.values());
  }

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     * Override to return a map other than HashMap as the confirmed map.
     *
     * @return a map that is known to be valid
     */
    public MultiMap makeConfirmedMap() {
        return new MultiHashMap();
    }

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    public String getCompatibilityVersion() {
        return "2";
    }


    public MultiMap makeEmptyMap() {
        return new MultiHashMap();
    }

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    //----------------------------
    //          Tests
    //----------------------------
    public void testPutNGet() {
        MultiHashMap map = new MultiHashMap();
        loadMap(map);
        checkMap(map);


        assertTrue(map.get(new Integer(99)) == null);


        map.clear();
        assertTrue(map.size() == 0);
    }

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        map.clear();
        assertTrue(map.size() == 0);
    }


    public void testContainsValue() {
        MultiHashMap map = new MultiHashMap();
        loadMap(map);


        assertTrue(map.containsValue("uno"));
        assertTrue(map.containsValue("quatro"));
        assertTrue(map.containsValue("two"));


        assertTrue(!map.containsValue("uggaBugga"));


        map.clear();
    }

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        map.clear();
    }


    public void testValues() {
        MultiHashMap map = new MultiHashMap();
        loadMap(map);


        Collection vals = map.values();
        assertTrue(vals.size() == getFullSize());


        map.clear();
    }

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