gremlin-python/src/main/python/gremlin_python/structure/io/graphsonV2d0.py [42:96]:
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_serializers = OrderedDict()
_deserializers = {}


class GraphSONTypeType(type):
    def __new__(mcs, name, bases, dct):
        cls = super(GraphSONTypeType, mcs).__new__(mcs, name, bases, dct)
        if not name.startswith('_'):
            if cls.python_type:
                _serializers[cls.python_type] = cls
            if cls.graphson_type:
                _deserializers[cls.graphson_type] = cls
        return cls


class GraphSONUtil(object):
    TYPE_KEY = "@type"
    VALUE_KEY = "@value"

    @classmethod
    def typed_value(cls, type_name, value, prefix="g"):
        out = {cls.TYPE_KEY: cls.format_type(prefix, type_name)}
        if value is not None:
            out[cls.VALUE_KEY] = value
        return out

    @classmethod
    def format_type(cls, prefix, type_name):
        return "%s:%s" % (prefix, type_name)


# Read/Write classes split to follow precedence of the Java API
class GraphSONWriter(object):
    def __init__(self, serializer_map=None):
        """
        :param serializer_map: map from Python type to serializer instance implementing `dictify`
        """
        self.serializers = _serializers.copy()
        if serializer_map:
            self.serializers.update(serializer_map)

    def write_object(self, objectData):
        # to JSON
        return json.dumps(self.to_dict(objectData), separators=(',', ':'))

    def to_dict(self, obj):
        """
        Encodes python objects in GraphSON type-tagged dict values
        """
        try:
            return self.serializers[type(obj)].dictify(obj, self)
        except KeyError:
            for key, serializer in self.serializers.items():
                if isinstance(obj, key):
                    return serializer.dictify(obj, self)
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gremlin-python/src/main/python/gremlin_python/structure/io/graphsonV3d0.py [43:97]:
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_serializers = OrderedDict()
_deserializers = {}


class GraphSONTypeType(type):
    def __new__(mcs, name, bases, dct):
        cls = super(GraphSONTypeType, mcs).__new__(mcs, name, bases, dct)
        if not name.startswith('_'):
            if cls.python_type:
                _serializers[cls.python_type] = cls
            if cls.graphson_type:
                _deserializers[cls.graphson_type] = cls
        return cls


class GraphSONUtil(object):
    TYPE_KEY = "@type"
    VALUE_KEY = "@value"

    @classmethod
    def typed_value(cls, type_name, value, prefix="g"):
        out = {cls.TYPE_KEY: cls.format_type(prefix, type_name)}
        if value is not None:
            out[cls.VALUE_KEY] = value
        return out

    @classmethod
    def format_type(cls, prefix, type_name):
        return "%s:%s" % (prefix, type_name)


# Read/Write classes split to follow precedence of the Java API
class GraphSONWriter(object):
    def __init__(self, serializer_map=None):
        """
        :param serializer_map: map from Python type to serializer instance implementing `dictify`
        """
        self.serializers = _serializers.copy()
        if serializer_map:
            self.serializers.update(serializer_map)

    def write_object(self, objectData):
        # to JSON
        return json.dumps(self.to_dict(objectData), separators=(',', ':'))

    def to_dict(self, obj):
        """
        Encodes python objects in GraphSON type-tagged dict values
        """
        try:
            return self.serializers[type(obj)].dictify(obj, self)
        except KeyError:
            for key, serializer in self.serializers.items():
                if isinstance(obj, key):
                    return serializer.dictify(obj, self)
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