示例#1
0
        public virtual void Write(Enum value)
        {
            string enumName = null;

            Type type = value.GetType();

            if (type.IsDefined(typeof(FlagsAttribute), true) && !Enum.IsDefined(type, value))
            {
                Enum[]   flags     = JsonWriter.GetFlagList(type, value);
                string[] flagNames = new string[flags.Length];
                for (int i = 0; i < flags.Length; i++)
                {
                    flagNames[i] = JsonNameAttribute.GetJsonName(flags[i]);
                    if (String.IsNullOrEmpty(flagNames[i]))
                    {
                        flagNames[i] = flags[i].ToString("f");
                    }
                }
                enumName = String.Join(", ", flagNames);
            }
            else
            {
                enumName = JsonNameAttribute.GetJsonName(value);
                if (String.IsNullOrEmpty(enumName))
                {
                    enumName = value.ToString("f");
                }
            }

            this.Write(enumName);
        }
示例#2
0
        /// <summary>
        /// Gets the name specified for use in Json serialization.
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string GetJsonName(object value)
        {
            if (value == null)
            {
                return(null);
            }

            Type       type       = value.GetType();
            MemberInfo memberInfo = null;

            if (TCU.GetTypeInfo(type).IsEnum)
            {
                string name = Enum.GetName(type, value);
                if (String.IsNullOrEmpty(name))
                {
                    return(null);
                }
                memberInfo = TCU.GetTypeInfo(type).GetField(name);
            }
            else
            {
                memberInfo = value as MemberInfo;
            }

            if (MemberInfo.Equals(memberInfo, null))
            {
                throw new ArgumentException();
            }

#if WINDOWS_STORE
            JsonNameAttribute attribute = memberInfo.GetCustomAttribute <JsonNameAttribute> (true);
#else
            JsonNameAttribute attribute = Attribute.GetCustomAttribute(memberInfo, typeof(JsonNameAttribute)) as JsonNameAttribute;
#endif
            return(attribute != null ? attribute.Name : null);
        }
示例#3
0
        internal object CoerceType(Type targetType, object value)
        {
            bool isNullable = TypeCoercionUtility.IsNullable(targetType);

            if (value == null)
            {
                if (!allowNullValueTypes &&
                    TCU.GetTypeInfo(targetType).IsValueType&&
                    !isNullable)
                {
                    throw new JsonTypeCoercionException(String.Format(TypeCoercionUtility.ErrorNullValueType, new System.Object[] { targetType.FullName }));
                }
                return(value);
            }

            if (isNullable)
            {
                // nullable types have a real underlying struct
                Type[] genericArgs = targetType.GetGenericArguments();
                if (genericArgs.Length == 1)
                {
                    targetType = genericArgs[0];
                }
            }

            Type actualType = value.GetType();

            if (TCU.GetTypeInfo(targetType).IsAssignableFrom(TCU.GetTypeInfo(actualType)))
            {
                return(value);
            }

            if (TCU.GetTypeInfo(targetType).IsEnum)
            {
                if (value is String)
                {
                    if (!Enum.IsDefined(targetType, value))
                    {
                        // if isn't a defined value perhaps it is the JsonName
                        foreach (FieldInfo field in TCU.GetTypeInfo(targetType).GetFields())
                        {
                            string jsonName = JsonNameAttribute.GetJsonName(field);
                            if (((string)value).Equals(jsonName))
                            {
                                value = field.Name;
                                break;
                            }
                        }
                    }

                    return(Enum.Parse(targetType, (string)value));
                }
                else
                {
                    value = this.CoerceType(Enum.GetUnderlyingType(targetType), value);
                    return(Enum.ToObject(targetType, value));
                }
            }

            // Value is of the wrong type and it has been deserialized as an IDictionary.
            // Previously coercion was supported
            // but this generally just caused more problems than it solved, so type hints are recommended now.
            // More specifically this can cause annoying problems with tags when a tag is referencing some object
            // for which there is no type info for (e.g the field has been removed), that data would have been
            // deserialized as an IDictionary, but when the tag gets the information it will try to coerce it
            // which will often fail horribly
            if (value is IDictionary)
            {
                return(null);
                // Dictionary<string, MemberInfo> memberMap;
                // return this.CoerceType(targetType, (IDictionary)value, out memberMap);
            }

            if (TCU.GetTypeInfo(typeof(IEnumerable)).IsAssignableFrom(TCU.GetTypeInfo(targetType)) &&
                TCU.GetTypeInfo(typeof(IEnumerable)).IsAssignableFrom(TCU.GetTypeInfo(actualType)))
            {
                return(this.CoerceList(targetType, actualType, (IEnumerable)value));
            }

            if (value is String)
            {
                if (Type.Equals(targetType, typeof(DateTime)))
                {
                    DateTime date;
                    if (DateTime.TryParse(
                            (string)value,
                            DateTimeFormatInfo.InvariantInfo,
                            DateTimeStyles.RoundtripKind | DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.NoCurrentDateDefault,
                            out date))
                    {
                        return(date);
                    }
                }
                else if (Type.Equals(targetType, typeof(Guid)))
                {
                    // try-catch is pointless since will throw upon generic conversion
                    return(new Guid((string)value));
                }
                else if (Type.Equals(targetType, typeof(Char)))
                {
                    if (((string)value).Length == 1)
                    {
                        return(((string)value)[0]);
                    }
                }
                else if (Equals(targetType, typeof(Uri)))
                {
                    Uri uri;
                    if (Uri.TryCreate((string)value, UriKind.RelativeOrAbsolute, out uri))
                    {
                        return(uri);
                    }
                }
                else if (Type.Equals(targetType, typeof(Version)))
                {
                    // try-catch is pointless since will throw upon generic conversion
                    return(new Version((string)value));
                }
            }
            else if (Type.Equals(targetType, typeof(TimeSpan)))
            {
                return(new TimeSpan((long)this.CoerceType(typeof(Int64), value)));
            }

#if !WINPHONE_8
            TypeConverter converter = TypeDescriptor.GetConverter(targetType);
            if (converter.CanConvertFrom(actualType))
            {
                return(converter.ConvertFrom(value));
            }

            converter = TypeDescriptor.GetConverter(actualType);
            if (converter.CanConvertTo(targetType))
            {
                return(converter.ConvertTo(value, targetType));
            }
#endif

            try
            {
                // fall back to basics
                return(Convert.ChangeType(value, targetType));
            }
            catch (Exception ex)
            {
                throw new JsonTypeCoercionException(
                          String.Format("Error converting {0} to {1}", new System.Object[] { value.GetType().FullName, targetType.FullName }), ex);
            }
        }
示例#4
0
        /** Creates a member map for the type */
        private Dictionary <string, MemberInfo> CreateMemberMap(Type objectType)
        {
            Dictionary <string, MemberInfo> memberMap;

            if (this.MemberMapCache.TryGetValue(objectType, out memberMap))
            {
                // map was stored in cache
                return(memberMap);
            }

            // create a new map
            memberMap = new Dictionary <string, MemberInfo>();

            // load properties into property map
            Type tp = objectType;

            while (tp != null)
            {
                PropertyInfo[] properties = TCU.GetTypeInfo(tp).GetProperties(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
                for (int i = 0; i < properties.Length; i++)
                {
                    PropertyInfo info = properties [i];
                    if (!info.CanRead || !info.CanWrite)
                    {
                        continue;
                    }

                    if (JsonIgnoreAttribute.IsJsonIgnore(info))
                    {
                        continue;
                    }

                    string jsonName = JsonNameAttribute.GetJsonName(info);
                    if (String.IsNullOrEmpty(jsonName))
                    {
                        memberMap[info.Name] = info;
                    }
                    else
                    {
                        memberMap[jsonName] = info;
                    }
                }

                // load public fields into property map
                FieldInfo[] fields = TCU.GetTypeInfo(tp).GetFields(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
                foreach (FieldInfo info in fields)
                {
                    if (!info.IsPublic &&
        #if WINDOWS_STORE
                        info.GetCustomAttribute <JsonMemberAttribute>(false) == null
        #else
                            (info.GetCustomAttributes(typeof(JsonMemberAttribute), false).Length == 0 && info.GetCustomAttributes(typeof(SerializeField), true).Length == 0)
        #endif
                        )
                    {
                        continue;
                    }

                    if (JsonIgnoreAttribute.IsJsonIgnore(info))
                    {
                        continue;
                    }

                    string jsonName = JsonNameAttribute.GetJsonName(info);
                    if (String.IsNullOrEmpty(jsonName))
                    {
                        memberMap[info.Name] = info;
                    }
                    else
                    {
                        memberMap[jsonName] = info;
                    }

                    var formerlySerializedAs = info.GetCustomAttributes(typeof(JsonFormerlySerializedAsAttribute), true);
                    if (formerlySerializedAs.Length > 0)
                    {
                        var formerName = (formerlySerializedAs [0] as JsonFormerlySerializedAsAttribute).name;
                        if (!String.IsNullOrEmpty(formerName) && !memberMap.ContainsKey(formerName))
                        {
                            memberMap [formerName] = info;
                        }
                    }
                }

                tp = tp.BaseType;
            }

            // store in cache for repeated usage
            this.MemberMapCache[objectType] = memberMap;

            return(memberMap);
        }
示例#5
0
        public void GetMemberWritingMap(Type objectType, JsonWriterSettings settings, out Member[] outMembers)
        {
            if (writingMaps == null)
            {
                writingMaps = new Dictionary <Type, Member[]> ();
            }

            if (writingMaps.TryGetValue(objectType, out outMembers))
            {
                return;
            }

            bool anonymousType = objectType.IsGenericType && objectType.Name.StartsWith(JsonWriter.AnonymousTypePrefix);

            Type tp = objectType;

            if (memberList == null)
            {
                memberList = new List <Member> ();
            }

            memberList.Clear();

            while (tp != null)
            {
                FieldInfo[] fields = tp.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
                for (int j = 0; j < fields.Length; j++)
                {
                    FieldInfo field = fields[j];

                    if (field.IsStatic || (!field.IsPublic && (field.GetCustomAttributes(typeof(JsonMemberAttribute), true).Length == 0 &&
                                                               field.GetCustomAttributes(typeof(SerializeField), true).Length == 0)))
                    {
                        //if (Settings.DebugMode)
                        //	Console.WriteLine ("Cannot serialize " + field.Name + " : not public or is static (and does not have a JsonMember attribute)");
                        continue;
                    }

                    if (settings.IsIgnored(objectType, field, null))
                    {
                        //if (Settings.DebugMode)
                        //	Console.WriteLine ("Cannot serialize " + field.Name + " : ignored by settings");
                        continue;
                    }

                    // use Attributes here to control naming
                    string fieldName = JsonNameAttribute.GetJsonName(field);
                    if (String.IsNullOrEmpty(fieldName))
                    {
                        fieldName = field.Name;
                    }

                    memberList.Add(new Member(fieldName, field));
                }

                PropertyInfo[] properties = tp.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
                for (int j = 0; j < properties.Length; j++)
                {
                    PropertyInfo property = properties[j];

                    //Console.WriteLine (property.Name);
                    if (!property.CanRead)
                    {
                        //if (Settings.DebugMode)
                        //	Console.WriteLine ("Cannot serialize "+property.Name+" : cannot read");
                        continue;
                    }

                    if (!property.CanWrite && !anonymousType)
                    {
                        //if (Settings.DebugMode)
                        //	Console.WriteLine ("Cannot serialize "+property.Name+" : cannot write");
                        continue;
                    }

                    if (settings.IsIgnored(objectType, property, null))
                    {
                        //if (Settings.DebugMode)
                        //	Console.WriteLine ("Cannot serialize "+property.Name+" : is ignored by settings");
                        continue;
                    }

                    if (property.GetIndexParameters().Length != 0)
                    {
                        //if (Settings.DebugMode)
                        //	Console.WriteLine ("Cannot serialize "+property.Name+" : is indexed");
                        continue;
                    }


                    // use Attributes here to control naming
                    string propertyName = JsonNameAttribute.GetJsonName(property);
                    if (String.IsNullOrEmpty(propertyName))
                    {
                        propertyName = property.Name;
                    }

                    memberList.Add(new Member(propertyName, property));
                }

                tp = tp.BaseType;
            }

            for (int i = 0; i < memberList.Count; i++)
            {
                memberList [i].index = i;
            }

            memberList.Sort((a, b) => {
                var attrA  = Attribute.GetCustomAttribute(a.member, typeof(JsonOrderAttribute), true) as JsonOrderAttribute;
                var attrB  = Attribute.GetCustomAttribute(b.member, typeof(JsonOrderAttribute), true) as JsonOrderAttribute;
                var orderA = attrA != null ? attrA.order : 0;
                var orderB = attrB != null ? attrB.order : 0;
                var c      = orderA.CompareTo(orderB);
                if (c != 0)
                {
                    return(c);
                }

                // Ensure stable sort
                return(a.index.CompareTo(b.index));
            });

            outMembers = memberList.ToArray();
            writingMaps[objectType] = outMembers;
        }