67 lines
2.7 KiB
Python
67 lines
2.7 KiB
Python
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from _plotly_utils.basevalidators import LiteralValidator
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import _plotly_utils.basevalidators as basevalidators
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import json
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import os.path as opath
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DERIVED_CLASSES = {
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"DataValidator": "data",
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"LayoutValidator": "layout",
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}
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class ValidatorCache(object):
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_cache = {}
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_json_cache = None
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@staticmethod
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def get_validator(parent_path, prop_name):
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if ValidatorCache._json_cache is None:
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# Load the JSON validator params from the file
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validator_json_path = opath.join(
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opath.dirname(__file__), "validators", "_validators.json"
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)
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if not opath.exists(validator_json_path):
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raise FileNotFoundError(
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f"Validator JSON file not found: {validator_json_path}"
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)
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with open(validator_json_path, "r") as f:
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ValidatorCache._json_cache = json.load(f)
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key = (parent_path, prop_name)
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if key not in ValidatorCache._cache:
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if "." not in parent_path and prop_name == "type":
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# Special case for .type property of traces
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validator = LiteralValidator("type", parent_path, parent_path)
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else:
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lookup_name = None
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if parent_path == "layout":
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from .graph_objects import Layout
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match = Layout._subplotid_prop_re.match(prop_name)
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if match:
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lookup_name = match.group(1)
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lookup_name = lookup_name or prop_name
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lookup = f"{parent_path}.{lookup_name}" if parent_path else lookup_name
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validator_item = ValidatorCache._json_cache.get(lookup)
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validator_classname = validator_item["superclass"]
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if validator_classname in DERIVED_CLASSES:
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# If the superclass is a derived class, we need to get the base class
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# and pass the derived class name as a parameter
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base_item = ValidatorCache._json_cache.get(
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DERIVED_CLASSES[validator_classname]
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)
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validator_params = base_item["params"]
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validator_params.update(validator_item["params"])
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validator_classname = base_item["superclass"]
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else:
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validator_params = validator_item["params"]
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validator_params["plotly_name"] = prop_name
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validator_class = getattr(basevalidators, validator_classname)
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validator = validator_class(**validator_params)
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ValidatorCache._cache[key] = validator
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return ValidatorCache._cache[key]
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