Examples of java.util.EnumMap

java.util.EnumMap
A specialized {@link Map} implementation for use with enum type keys. Allof the keys in an enum map must come from a single enum type that is specified, explicitly or implicitly, when the map is created. Enum maps are represented internally as arrays. This representation is extremely compact and efficient.
Enum maps are maintained in the natural order of their keys (the order in which the enum constants are declared). This is reflected in the iterators returned by the collections views ( {@link #keySet()}, {@link #entrySet()}, and {@link #values()}).
Iterators returned by the collection views are weakly consistent: they will never throw {@link ConcurrentModificationException} and they mayor may not show the effects of any modifications to the map that occur while the iteration is in progress.
Null keys are not permitted. Attempts to insert a null key will throw {@link NullPointerException}. Attempts to test for the presence of a null key or to remove one will, however, function properly. Null values are permitted.
Like most collection implementations EnumMap is not synchronized. If multiple threads access an enum map concurrently, and at least one of the threads modifies the map, it should be synchronized externally. This is typically accomplished by synchronizing on some object that naturally encapsulates the enum map. If no such object exists, the map should be "wrapped" using the {@link Collections#synchronizedMap}method. This is best done at creation time, to prevent accidental unsynchronized access:
```
 Map<EnumKey, V> m = Collections.synchronizedMap(new EnumMap<EnumKey, V>(...)); 
```
Implementation note: All basic operations execute in constant time. They are likely (though not guaranteed) to be faster than their {@link HashMap} counterparts.
This class is a member of the Java Collections Framework. @author Josh Bloch @version 1.16, 04/21/06 @see EnumSet @since 1.5


    @SuppressWarnings( "unchecked" )
    @Override
    public EnumMap<?, ?> read( final ByteBuffer buffer ) {
        final Class<?> keyType = _kryo.readClass( buffer ).getType();
        final EnumMap result = new EnumMap( keyType );
        final int size = IntSerializer.get( buffer, true );
        for ( int i = 0; i < size; i++ ) {
            final Object key = EnumSerializer.get( buffer, keyType );
            final Object value = _kryo.readClassAndObject( buffer );
            result.put( key, value );
        }
        return result;
    }

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        Suit.CLUBS, "value1",
        Suit.DIAMONDS, "value2"
    };


    static void test() {
        EnumMap map = new EnumMap(Suit.class);
        map.put(array[0], array[1]);
    }

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    private static final Object FAKE_REFERENCE = new Object();


    @Override
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public EnumMap<? extends Enum<?>, ?> copy (final Kryo kryo, final EnumMap<? extends Enum<?>, ?> original) {
        return new EnumMap(original);
    }

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    @SuppressWarnings( { "unchecked", "rawtypes" } )
    private EnumMap<? extends Enum<?>, ?> create(final Kryo kryo, final Input input,
        final Class<EnumMap<? extends Enum<?>, ?>> type) {
        final Class<? extends Enum<?>> keyType = kryo.readClass( input ).getType();
        return new EnumMap( keyType );
    }

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            final Class<EnumMap<? extends Enum<?>, ?>> type) {
        kryo.reference(FAKE_REFERENCE);
        final EnumMap<? extends Enum<?>, ?> result = create(kryo, input, type);
        final Class<Enum<?>> keyType = getKeyType( result );
        final Enum<?>[] enumConstants = keyType.getEnumConstants();
        final EnumMap rawResult = result;
        final int size = input.readInt(true);
        for ( int i = 0; i < size; i++ ) {
            final int ordinal = input.readInt(true);
            final Enum<?> key = enumConstants[ordinal];
            final Object value = kryo.readClassAndObject( input );
            rawResult.put( key, value );
        }
        return result;
    }

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/*     */   }
/*     */ 
/*     */   RuntimeEnumLeafInfoImpl(RuntimeModelBuilder builder, Locatable upstream, Class<T> enumType)
/*     */   {
/*  82 */     super(builder, upstream, enumType, enumType);
/*  83 */     this.printMap = new EnumMap(enumType);
/*     */ 
/*  85 */     this.baseXducer = ((RuntimeNonElement)this.baseType).getTransducer();
/*     */   }

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    return localEnumHashBiMap;
  }


  private EnumHashBiMap(Class paramClass)
  {
    super(WellBehavedMap.wrap(new EnumMap(paramClass)), Maps.newHashMapWithExpectedSize(((Enum[])paramClass.getEnumConstants()).length));
    this.keyType = paramClass;
  }

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  private void readObject(ObjectInputStream paramObjectInputStream)
    throws IOException, ClassNotFoundException
  {
    paramObjectInputStream.defaultReadObject();
    this.keyType = ((Class)paramObjectInputStream.readObject());
    setDelegates(WellBehavedMap.wrap(new EnumMap(this.keyType)), new HashMap(((Enum[])this.keyType.getEnumConstants()).length * 3 / 2));
    Serialization.populateMap(this, paramObjectInputStream);
  }

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    return localEnumBiMap;
  }


  private EnumBiMap(Class paramClass1, Class paramClass2)
  {
    super(WellBehavedMap.wrap(new EnumMap(paramClass1)), WellBehavedMap.wrap(new EnumMap(paramClass2)));
    this.keyType = paramClass1;
    this.valueType = paramClass2;
  }

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    throws IOException, ClassNotFoundException
  {
    paramObjectInputStream.defaultReadObject();
    this.keyType = ((Class)paramObjectInputStream.readObject());
    this.valueType = ((Class)paramObjectInputStream.readObject());
    setDelegates(WellBehavedMap.wrap(new EnumMap(this.keyType)), WellBehavedMap.wrap(new EnumMap(this.valueType)));
    Serialization.populateMap(this, paramObjectInputStream);
  }

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