Message.cs

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using System;
using System.Collections.Generic;
using System.Text;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json;

namespace Avro
{
    public class Message
    {
        public string Name { get; set; }

        public string Doc { get; set; }

        public RecordSchema Request { get; set; }

        public Schema Response { get; set; }

        public UnionSchema Error { get; set; }

        public bool? Oneway { get; set; }

        public UnionSchema SupportedErrors { get; set; }

        public Message(string name, string doc, RecordSchema request, Schema response, UnionSchema error, bool? oneway)
        {
            if (string.IsNullOrEmpty(name)) throw new ArgumentNullException("name", "name cannot be null.");
            this.Request = request;
            this.Response = response;
            this.Error = error;
            this.Name = name;
            this.Doc = doc;
            this.Oneway = oneway;

            if (error != null && error.CanRead(Schema.Parse("string")))
            {
                this.SupportedErrors = error;
            }
            else
            {
                this.SupportedErrors = (UnionSchema) Schema.Parse("[\"string\"]");

                if (error != null)
                {
                    for (int i = 0; i < error.Schemas.Count; ++i)
                    {
                        this.SupportedErrors.Schemas.Add(error.Schemas[i]);
                    }
                }
            }
        }

        internal static Message Parse(JProperty jmessage, SchemaNames names, string encspace)
        {
            string name = jmessage.Name;
            string doc = JsonHelper.GetOptionalString(jmessage.Value, "doc");
            bool? oneway = JsonHelper.GetOptionalBoolean(jmessage.Value, "one-way");

            PropertyMap props = Schema.GetProperties(jmessage.Value);
            RecordSchema schema = RecordSchema.NewInstance(Schema.Type.Record, jmessage.Value as JObject, props, names, encspace);

            JToken jresponse = jmessage.Value["response"];
            var response = Schema.ParseJson(jresponse, names, encspace);

            JToken jerrors = jmessage.Value["errors"];
            UnionSchema uerrorSchema = null;
            if (null != jerrors)
            {
                Schema errorSchema = Schema.ParseJson(jerrors, names, encspace);
                if (!(errorSchema is UnionSchema))
                    throw new AvroException("");

                uerrorSchema = errorSchema as UnionSchema;
            }

            return new Message(name, doc, schema, response, uerrorSchema, oneway);
        }

        internal void writeJson(Newtonsoft.Json.JsonTextWriter writer, SchemaNames names, string encspace)
        {
            writer.WriteStartObject();
            JsonHelper.writeIfNotNullOrEmpty(writer, "doc", this.Doc);

            if (null != this.Request)
                this.Request.WriteJsonFields(writer, names, null);

            if (null != this.Response)
            {
                writer.WritePropertyName("response");
                Response.WriteJson(writer, names, encspace);
            }

            if (null != this.Error)
            {
                writer.WritePropertyName("errors");
                this.Error.WriteJson(writer, names, encspace);
            }

            if (null != Oneway)
            {
                writer.WritePropertyName("one-way");
                writer.WriteValue(Oneway);
            }

            writer.WriteEndObject();
        }

        public override bool Equals(Object obj) 
        {
          if (obj == this) return true;
          if (!(obj is Message)) return false;

          Message that = obj as Message;
          return this.Name.Equals(that.Name) && 
                 this.Request.Equals(that.Request) &&
                 areEqual(this.Response, that.Response) && 
                 areEqual(this.Error, that.Error);
        }

        public override int GetHashCode() 
        {
            return Name.GetHashCode() +
                   Request.GetHashCode() +
                  (Response == null ? 0 : Response.GetHashCode()) +
                  (Error == null ? 0 : Error.GetHashCode());
        }

        protected static bool areEqual(object o1, object o2)
        {
            return o1 == null ? o2 == null : o1.Equals(o2);
        }
    }
}