Custom type of Set and Map serialization

[yyc1217]

For custom type of Set and Map serialization.

Set:

@Column
@Serializer(FooSerializer.class)
private Set<Foo> fooSet;

SetColumnMapper gets FooSerializer from @Serializer.
If there is no explicit @Serializer, then it will inferred from Foo, which is the first generic type.

Map:

@Column
@Serializer(FooSerializer.class)
private Map<String, Foo> fooMap;

MapColumnMapper gets FooSerializer from @Serializer only for value part, not for key.
If there is no explicit @Serializer, then it will inferred from 'Foo', which is the second generic type. It's not support custom type key for now.

[yyc1217]

I was wondering some annotations like

@Serializer(mapKey=KeySerializer.class, mapValue=ValueSerializer.class) 

@MapSerializer(key=KeySerializer.class, value=ValueSerialier.class) 

to specify serializer for Map type.

Furthermore, for Set type?

@SetSerializer(ValueSerializer.class)