{
  "$id": "https://opendatafabric.org/schemas/sources/v1alpha1/EventTimeSource",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "description": "Defines the external source of data.",
  "$defs": {
    "FromMetadata": {
      "description": "Extracts event time from the source's metadata.",
      "type": "object",
      "required": [],
      "properties": {}
    },
    "FromSystemTime": {
      "description": "Assigns event time from the system time source.",
      "type": "object",
      "required": [],
      "properties": {}
    },
    "FromPath": {
      "description": "Extracts event time from the path component of the source.",
      "type": "object",
      "required": [
        "pattern"
      ],
      "properties": {
        "pattern": {
          "type": "string",
          "format": "regex",
          "description": "Regular expression where first group contains the timestamp string."
        },
        "timestampFormat": {
          "type": "string",
          "description": "Format of the expected timestamp in java.text.SimpleDateFormat form."
        }
      }
    }
  },
  "format": "union-or-string",
  "oneOf": [
    {
      "type": "string",
      "enum": [
        "FromMetadata",
        "FromPath",
        "FromSystemTime"
      ]
    },
    {
      "allOf": [
        {
          "properties": {
            "kind": {
              "type": "string",
              "const": "FromMetadata"
            }
          },
          "required": [
            "kind"
          ]
        },
        {
          "$ref": "#/$defs/FromMetadata"
        }
      ]
    },
    {
      "allOf": [
        {
          "properties": {
            "kind": {
              "type": "string",
              "const": "FromPath"
            }
          },
          "required": [
            "kind"
          ]
        },
        {
          "$ref": "#/$defs/FromPath"
        }
      ]
    },
    {
      "allOf": [
        {
          "properties": {
            "kind": {
              "type": "string",
              "const": "FromSystemTime"
            }
          },
          "required": [
            "kind"
          ]
        },
        {
          "$ref": "#/$defs/FromSystemTime"
        }
      ]
    }
  ]
}