{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-search/google-cloud-dataflow/json-schema/google-cloud-dataflow-template-schema.json",
  "title": "Google Cloud Dataflow Template",
  "description": "Metadata describing a Dataflow template, including its name, description, parameters, and streaming capability. Templates define reusable pipeline structures that can be launched with different runtime parameters.",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Required. The name of the template."
    },
    "description": {
      "type": "string",
      "description": "Optional. A description of the template."
    },
    "parameters": {
      "type": "array",
      "description": "The parameters for the template, defining inputs that can be configured at launch time.",
      "items": {
        "$ref": "#/$defs/ParameterMetadata"
      }
    },
    "streaming": {
      "type": "boolean",
      "description": "If true, this template processes unbounded data streams."
    },
    "supportsAtLeastOnce": {
      "type": "boolean",
      "description": "If true, this template supports at-least-once processing."
    },
    "supportsExactlyOnce": {
      "type": "boolean",
      "description": "If true, this template supports exactly-once processing."
    },
    "defaultStreamingMode": {
      "type": "string",
      "description": "The default streaming mode for the template."
    },
    "templateType": {
      "type": "string",
      "description": "The type of the template.",
      "enum": [
        "UNKNOWN",
        "LEGACY",
        "FLEX"
      ]
    }
  },
  "required": ["name"],
  "$defs": {
    "ParameterMetadata": {
      "type": "object",
      "description": "Metadata for a specific parameter used by a template.",
      "properties": {
        "name": {
          "type": "string",
          "description": "Required. The name of the parameter."
        },
        "label": {
          "type": "string",
          "description": "Required. The label to display for the parameter."
        },
        "helpText": {
          "type": "string",
          "description": "Required. Help text to display for the parameter."
        },
        "isOptional": {
          "type": "boolean",
          "description": "Optional. Whether the parameter is optional. Defaults to false."
        },
        "regexes": {
          "type": "array",
          "description": "Optional. Regular expressions used to validate the parameter value.",
          "items": {
            "type": "string"
          }
        },
        "paramType": {
          "type": "string",
          "description": "The type of the parameter.",
          "enum": [
            "DEFAULT",
            "TEXT",
            "GCS_READ_BUCKET",
            "GCS_WRITE_BUCKET",
            "GCS_READ_FILE",
            "GCS_WRITE_FILE",
            "GCS_READ_FOLDER",
            "GCS_WRITE_FOLDER",
            "PUBSUB_TOPIC",
            "PUBSUB_SUBSCRIPTION",
            "BIGQUERY_TABLE",
            "JAVASCRIPT_UDF_FILE",
            "SERVICE_ACCOUNT",
            "MACHINE_TYPE",
            "KMS_KEY_NAME",
            "WORKER_REGION",
            "WORKER_ZONE",
            "BOOLEAN",
            "ENUM",
            "NUMBER",
            "KAFKA_TOPIC",
            "KAFKA_READ_TOPIC",
            "KAFKA_WRITE_TOPIC"
          ]
        }
      },
      "required": ["name", "label", "helpText"]
    }
  }
}