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

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

  "definitions": {
    "type-id": {
      "title": "Any type id (name)",
      "enum": [
        "void",
        "string",
        "bool",
        "byte",
        "i8",
        "i16",
        "i32",
        "i64",
        "double",
        "list",
        "set",
        "map",
        "union",
        "struct",
        "binary"
      ]
    },
    "base-type": {
      "title": "Base type schema",
      "type": "object",
      "properties": {
        "typeId": {
          "enum": ["void", "string", "bool", "byte", "i8", "i16", "i32", "i64", "double", "binary" ]
        }
      },
      "required": [ "typeId" ]
    },
    "list-type": {
      "title": "List and set schema",
      "type": "object",
      "properties": {
        "typeId": {
          "enum": [ "list", "set" ]
        },
        "elemTypeId":  { "$ref": "#/definitions/type-id" },
        "elemType":    { "$ref": "#/definitions/type-desc" }
      },
      "required": [ "typeId", "elemTypeId" ]
    },
    "map-type": {
      "title": "Map schema",
      "type": "object",
      "properties": {
        "typeId": {
          "enum": [ "map" ]
        },
        "keyTypeId":   { "$ref": "#/definitions/type-id" },
        "keyType":     { "$ref": "#/definitions/type-desc" },
        "valueTypeId": { "$ref": "#/definitions/type-id" },
        "valueType":   { "$ref": "#/definitions/type-desc" }
      },
      "required": [ "typeId", "keyTypeId", "valueTypeId" ]
    },
    "struct-type": {
      "title": "Struct, union and exception schema",
      "type": "object",
      "properties": {
        "typeId": {
          "enum": [ "union", "struct", "exception" ]
        }
      },
      "required": [ "typeId", "class" ]
    },
    "type-desc": {
      "title": "Type descriptor schema",
      "allOf": [
        {
            "type": "object",
            "properties": {
                "typeId":      { "type": "string" },
                "class":       { "type": "string" }
            }
        },
        {
          "oneOf":
          [
            { "$ref": "#/definitions/base-type" },
            { "$ref": "#/definitions/list-type" },
            { "$ref": "#/definitions/map-type" },
            { "$ref": "#/definitions/struct-type" }
          ]
        }
      ]
    },
    "name-and-doc": {
      "title": "Name and documentation sub-schema",
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "doc": { "type": "string" }
      },
      "required": [ "name" ]
    },
    "enum": {
      "title": "Thrift 'enum' definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "required": [ "members" ],
          "properties": {
            "members": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "name": { "type": "string" },
                  "value": { "type": "integer" }
                },
                "required": [ "name", "value" ]
              }
            }
          }
        }
      ]
    },
    "typedef": {
      "title": "Thrift typedef definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "typeId": { "$ref": "#/definitions/type-id" },
            "type": { "$ref": "#/definitions/type-desc" }
          },
          "required": [ "typeId" ]
        }
      ]
    },
    "constant": {
      "title": "Thrift constant definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        { "$ref": "#/definitions/type-desc" },
        {
          "properties": {
            "value": {
              "oneOf": [
                { "type": "string" },
                { "type": "number" },
                { "type": "array" },
                { "type": "object" }
              ]
            }
          },
          "required": [ "value" ]
        }
      ]
    },
    "field": {
      "title": "Thrift struct field definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "key": {
              "type": "integer",
              "minimum": 1,
              "maximum": 65535
            },
            "required": {
              "enum": [ "required", "optional", "req_out" ]
            },
            "typeId": { "$ref": "#/definitions/type-id" },
            "type": { "$ref": "#/definitions/type-desc" },
            "default": {
              "oneOf": [
                { "type": "string" },
                { "type": "number" },
                { "type": "array" },
                { "type": "object" }
              ]
            }
          },
          "required": [ "key", "required" ]
        }
      ]
    },
    "struct": {
      "title": "Thrift struct definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "isException": { "type": "boolean" },
            "isUnion": { "type": "boolean" },
            "fields": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/field"
              }
            }
          },
          "required": [ "isException", "isUnion", "fields" ]
        }
      ]
    },
    "union": {
      "title": "Thrift union definition schema",
      "$ref": "#/definitions/struct"
    },
    "exception": {
      "title": "Thrift exception definition schema",
      "type": "object",
      "properties": {
        "key": {
          "type": "integer",
          "minimum": 1,
          "maximum": 65535
        },
        "name": { "type": "string" },
        "typeId": { "enum": [ "exception" ] },
        "type": { "$ref": "#/definitions/struct-type" }
      },
      "required": [ "key", "name", "typeId" ]
    },
    "function": {
      "title": "Thrift service function definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "oneway": {
              "type": "boolean"
            },
            "returnType": {
              "$ref": "#/definitions/type-desc"
            },
            "arguments": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/field"
              }
            },
            "exceptions": {
              "type": "array",
              "items": { "$ref": "#/definitions/exception" }
            }
          },
          "required": [ "oneway", "arguments", "exceptions" ]
        }
      ]
    },
    "service": {
      "title": "Thrift service definition schema",
      "type": "object",
      "allOf": [
        { "$ref": "#/definitions/name-and-doc" },
        {
          "properties": {
            "functions": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/function"
              }
            }
          },
          "required": [ "functions" ]
        }
      ]
    }
  },

  "type": "object",
  "required": [
    "name",
    "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"
      }
    }
  }
}
