{
  "$schema": "http://json-schema.org/draft-04/schema#",

  "id": "http://thrift.apache.org/program-schema#",
  "description": "Schema for Apache Thrift protocol descriptors",

  "definitions": {
    "type-id": {
      "enum": [
        "void",
        "string",
        "bool",
        "byte",
        "i16",
        "i32",
        "i64",
        "double",
        "list",
        "set",
        "map",
        "union",
        "struct",
        "exception",
        "binary"
      ]
    },
    "base-type": {
      "title": "Base types",
      "type": "object",
      "properties": {
        "typeId": {
          "enum": [ "void", "string", "bool", "byte", "i16", "i32", "i64", "double", "binary" ]
        }
      },
      "required": [ "typeId" ]
    },
    "list-type": {
      "title": "List and set types",
      "type": "object",
      "properties": {
        "typeId": { "enum": [ "list", "set" ] },
        "elemTypeId": { "$ref": "#/definitions/type-id" },
        "elemType": { "$ref": "#/definitions/type-spec" }
      },
      "required": [ "typeId", "elemTypeId", "elemType" ]
    },
    "map-type": {
      "title": "Map type",
      "type": "object",
      "properties": {
        "typeId":      { "enum": [ "map" ] },
        "keyTypeId":   { "$ref": "#/definitions/type-id" },
        "keyType":     { "$ref": "#/definitions/type-spec" },
        "valueTypeId": { "$ref": "#/definitions/type-id" },
        "valueType":   { "$ref": "#/definitions/type-spec" }
      },
      "required": [ "typeId", "keyTypeId", "valueTypeId" ]
    },
    "struct-spec": {
      "title": "Struct and union types",
      "type": "object",
      "properties": {
        "typeId": { "enum": [ "union", "struct" ] },
        "class": { "type": "string" }
      },
      "required": [ "typeId", "class" ]
    },
    "type-spec": {
      "allOf": [
        { "type": "object" },
        {
          "oneOf":
          [
            { "$ref": "#/definitions/base-type" },
            { "$ref": "#/definitions/list-type" },
            { "$ref": "#/definitions/map-type" },
            { "$ref": "#/definitions/struct-spec" }
          ]
        }
      ]
    },
    "name-and-doc": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "doc": { "type": "string" }
      },
      "required": [ "name" ]
    },
    "enum": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "required": [ "members" ],
          "properties": {
            "members": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "name": { "type": "string" },
                  "value": { "type": "integer" }
                },
                "required": [ "name", "value" ]
              }
            }
          }
        }
      ]
    },
    "typedef": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "typeId": { "$ref": "#/definitions/type-id" },
            "type": { "$ref": "#/definitions/type-spec" }
          },
          "required": [ "typeId" ]
        }
      ]
    },
    "constant": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        { "$ref": "#/definitions/type-spec" },
        {
          "properties": {
            "value": {
              "oneOf": [
                { "type": "string" },
                { "type": "number" },
                { "type": "array" },
                { "type": "object" }
              ]
            }
          },
          "required": [ "value" ]
        }
      ]
    },
    "field": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        { "$ref": "#/definitions/type-spec" },
        {
          "properties": {
            "key": {
              "type": "integer",
              "minimum": 1,
              "maximum": 65535
            },
            "required": {
              "enum": [ "required", "optional", "req_out" ]
            },
            "default": {
              "oneOf": [
                { "type": "string" },
                { "type": "number" },
                { "type": "array" },
                { "type": "object" }
              ]
            }
          },
          "required": [ "key", "required" ]
        }
      ]
    },
    "struct": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "isException": { "type": "boolean" },
            "isUnion": { "type": "boolean" },
            "fields": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/field"
              }
            }
          },
          "required": [ "isException", "isUnion", "fields" ]
        }
      ]
    },
    "union": {
      "$ref": "#/definitions/struct"
    },
    "exception": {
      "$ref": "#/definitions/struct"
    },
    "function": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "oneOf": [
            {
              "properties": { "oneway": { "type": "boolean" } },
              "required": [ "oneway" ]
            },
            {
              "properties": { "returnType": { "$ref": "#/definitions/type-spec" } },
              "required": [ "returnType" ]
            }
          ]
        },
        {
          "properties": {
            "arguments": {
              "type": "array",
              "items": {
                "allOf": [
                  { "$ref": "#/definitions/field" },
                  {
                    "properties": { }
                  }
                ]
              }
            },
            "exceptions": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/exception"
              }
            }
          },
          "required": [ "oneway", "arguments", "exceptions" ]
        }
      ]
    },
    "service": {
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "functions": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/function"
              }
            }
          },
          "required": [ "functions" ]
        }
      ]
    }
  },

  "type": "object",
  "required": [
    "name",
    "namespaces",
    "includes",
    "enums",
    "typedefs",
    "structs",
    "constants",
    "services"
  ],
  "properties": {
    "name": {
      "type": "string"
    },
    "includes": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "uniqueItems": true
    },
    "enums": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/enum"
      }
    },
    "typedefs": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/typedef"
      }
    },
    "structs": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/struct"
      }
    },
    "constants": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/constant"
      }
    },
    "services": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/service"
      }
    }
  }
}