airflow/utils/json.py

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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from datetime import date, datetime

import numpy as np
from flask.json import JSONEncoder

try:
    from kubernetes.client import models as k8s
except ImportError:
    k8s = None

# Dates and JSON encoding/decoding


class AirflowJsonEncoder(JSONEncoder):
    """Custom Airflow json encoder implementation."""

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.default = self._default

    @staticmethod
    def _default(obj):
        """Convert dates and numpy objects in a json serializable format."""
        if isinstance(obj, datetime):
            return obj.strftime('%Y-%m-%dT%H:%M:%SZ')
        elif isinstance(obj, date):
            return obj.strftime('%Y-%m-%d')
        elif isinstance(
            obj,
            (
                np.int_,
                np.intc,
                np.intp,
                np.int8,
                np.int16,
                np.int32,
                np.int64,
                np.uint8,
                np.uint16,
                np.uint32,
                np.uint64,
            ),
        ):
            return int(obj)
        elif isinstance(obj, np.bool_):
            return bool(obj)
        elif isinstance(
            obj, (np.float_, np.float16, np.float32, np.float64, np.complex_, np.complex64, np.complex128)
        ):
            return float(obj)
        elif k8s is not None and isinstance(obj, k8s.V1Pod):
            from airflow.kubernetes.pod_generator import PodGenerator

            return PodGenerator.serialize_pod(obj)

        raise TypeError(f"Object of type '{obj.__class__.__name__}' is not JSON serializable")