Beispiel #1
0
        /// <summary>
        /// Static function to return a new instance of the named schema
        /// </summary>
        /// <param name="jo">JSON object of the named schema</param>
        /// <param name="names">list of named schemas already read</param>
        /// <param name="encspace">enclosing namespace of the named schema</param>
        /// <returns></returns>
        internal static NamedSchema NewInstance(JObject jo, PropertyMap props, SchemaNames names, string encspace)
        {
            string type = JsonHelper.GetRequiredString(jo, "type");

            switch (type)
            {
            case "fixed":
                return(FixedSchema.NewInstance(jo, props, names, encspace));

            case "enum":
                return(EnumSchema.NewInstance(jo, props, names, encspace));

            case "record":
                return(RecordSchema.NewInstance(Type.Record, jo, props, names, encspace));

            case "error":
                return(RecordSchema.NewInstance(Type.Error, jo, props, names, encspace));

            default:
                NamedSchema result;
                if (names.TryGetValue(type, null, encspace, out result))
                {
                    return(result);
                }
                return(null);
            }
        }
Beispiel #2
0
        /// <summary>
        /// Static class to return new instance of schema object
        /// </summary>
        /// <param name="jtok">JSON object</param>
        /// <param name="names">list of named schemas already read</param>
        /// <param name="encspace">enclosing namespace of the schema</param>
        /// <returns>new Schema object</returns>
        internal static Schema ParseJson(JToken jtok, SchemaNames names, string encspace)
        {
            if (null == jtok)
            {
                throw new ArgumentNullException("j", "j cannot be null.");
            }

            if (jtok.Type == JTokenType.String) // primitive schema with no 'type' property or primitive or named type of a record field
            {
                string value = (string)jtok;

                PrimitiveSchema ps = PrimitiveSchema.NewInstance(value);
                if (null != ps)
                {
                    return(ps);
                }

                NamedSchema schema = null;
                if (names.TryGetValue(value, null, encspace, out schema))
                {
                    return(schema);
                }

                throw new SchemaParseException("Undefined name: " + value);
            }

            if (jtok is JArray) // union schema with no 'type' property or union type for a record field
            {
                return(UnionSchema.NewInstance(jtok as JArray, null, names, encspace));
            }

            if (jtok is JObject) // JSON object with open/close parenthesis, it must have a 'type' property
            {
                JObject jo = jtok as JObject;

                JToken jtype = jo["type"];
                if (null == jtype)
                {
                    throw new SchemaParseException("Property type is required");
                }

                var props = Schema.GetProperties(jtok);

                if (jtype.Type == JTokenType.String)
                {
                    string type = (string)jtype;

                    if (type.Equals("array"))
                    {
                        return(ArraySchema.NewInstance(jtok, props, names, encspace));
                    }
                    if (type.Equals("map"))
                    {
                        return(MapSchema.NewInstance(jtok, props, names, encspace));
                    }

                    Schema schema = PrimitiveSchema.NewInstance((string)type, props);
                    if (null != schema)
                    {
                        return(schema);
                    }

                    return(NamedSchema.NewInstance(jo, props, names, encspace));
                }
                else if (jtype.Type == JTokenType.Array)
                {
                    return(UnionSchema.NewInstance(jtype as JArray, props, names, encspace));
                }
            }
            throw new AvroTypeException("Invalid JSON for schema: " + jtok);
        }