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import abc |
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import logging |
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from gremlin_python.process.traversal import Cardinality # type: ignore |
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from goblin import element, exception, manager |
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logger = logging.getLogger(__name__) |
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class DataType(abc.ABC): |
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""" |
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Abstract base class for Goblin Data Types. All custom data types should |
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inherit from :py:class:`DataType`. |
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""" |
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def __init__(self, val=None): |
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if val: |
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val = self.validate(val) |
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self._val = val |
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@abc.abstractmethod |
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def validate(self, val): |
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"""Validate property value""" |
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return val |
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@abc.abstractmethod |
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def to_db(self, val=None): |
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""" |
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Convert property value to db compatible format. If no value passed, try |
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to use default bound value |
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""" |
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if val is None: |
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val = self._val |
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return val |
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@abc.abstractmethod |
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def to_ogm(self, val): |
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"""Convert property value to a Python compatible format""" |
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return val |
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def validate_vertex_prop(self, val, card, vertex_prop, data_type): |
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if card == Cardinality.list_: |
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if isinstance(val, list): |
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val = val |
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elif isinstance(val, (set, tuple)): |
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val = list(val) |
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else: |
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val = [val] |
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vertex_props = [] |
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for v in val: |
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vp = vertex_prop(data_type, card=card) |
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vp.value = self.validate(v) |
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vertex_props.append(vp) |
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val = manager.ListVertexPropertyManager(data_type, vertex_prop, |
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card, vertex_props) |
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elif card == Cardinality.set_: |
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if isinstance(val, set): |
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val = val |
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elif isinstance(val, (list, tuple)): |
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val = set(val) |
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else: |
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val = set([val]) |
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vertex_props = set([]) |
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for v in val: |
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if not isinstance(v, element.VertexProperty): |
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vp = vertex_prop(data_type, card=card) |
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vp.value = self.validate(v) |
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else: |
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vp = v |
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vertex_props.add(vp) |
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val = manager.SetVertexPropertyManager(data_type, vertex_prop, |
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card, vertex_props) |
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else: |
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vp = vertex_prop(data_type) |
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vp.value = self.validate(val) |
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val = vp |
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return val |
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class BaseProperty: |
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"""Abstract base class that implements the property interface""" |
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@property |
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def data_type(self): |
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raise NotImplementedError |
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goblin-ogm /
goblin
