1 #region License 2 // Copyright (c) 2007 James Newton-King 3 // 4 // Permission is hereby granted, free of charge, to any person 5 // obtaining a copy of this software and associated documentation 6 // files (the "Software"), to deal in the Software without 7 // restriction, including without limitation the rights to use, 8 // copy, modify, merge, publish, distribute, sublicense, and/or sell 9 // copies of the Software, and to permit persons to whom the 10 // Software is furnished to do so, subject to the following 11 // conditions: 12 // 13 // The above copyright notice and this permission notice shall be 14 // included in all copies or substantial portions of the Software. 15 // 16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 18 // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 20 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 21 // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 // OTHER DEALINGS IN THE SOFTWARE. 24 #endregion 25 26 using System; 27 using System.Globalization; 28 using Newtonsoft.Json.Utilities; 29 30 namespace Newtonsoft.Json.Converters 31 { 32 /// <summary> 33 /// Converts a <see cref="DateTime"/> to and from a JavaScript date constructor (e.g. new Date(52231943)). 34 /// </summary> 35 public class JavaScriptDateTimeConverter : DateTimeConverterBase 36 { 37 /// <summary> 38 /// Writes the JSON representation of the object. 39 /// </summary> 40 /// <param name="writer">The <see cref="JsonWriter"/> to write to.</param> 41 /// <param name="value">The value.</param> 42 /// <param name="serializer">The calling serializer.</param> WriteJson(JsonWriter writer, object value, JsonSerializer serializer)43 public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) 44 { 45 long ticks; 46 47 if (value is DateTime) 48 { 49 DateTime dateTime = (DateTime)value; 50 DateTime utcDateTime = dateTime.ToUniversalTime(); 51 ticks = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(utcDateTime); 52 } 53 #if !NET20 54 else if (value is DateTimeOffset) 55 { 56 DateTimeOffset dateTimeOffset = (DateTimeOffset)value; 57 DateTimeOffset utcDateTimeOffset = dateTimeOffset.ToUniversalTime(); 58 ticks = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(utcDateTimeOffset.UtcDateTime); 59 } 60 #endif 61 else 62 { 63 throw new JsonSerializationException("Expected date object value."); 64 } 65 66 writer.WriteStartConstructor("Date"); 67 writer.WriteValue(ticks); 68 writer.WriteEndConstructor(); 69 } 70 71 /// <summary> 72 /// Reads the JSON representation of the object. 73 /// </summary> 74 /// <param name="reader">The <see cref="JsonReader"/> to read from.</param> 75 /// <param name="objectType">Type of the object.</param> 76 /// <param name="existingValue">The existing property value of the JSON that is being converted.</param> 77 /// <param name="serializer">The calling serializer.</param> 78 /// <returns>The object value.</returns> ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)79 public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) 80 { 81 if (reader.TokenType == JsonToken.Null) 82 { 83 if (!ReflectionUtils.IsNullable(objectType)) 84 { 85 throw JsonSerializationException.Create(reader, "Cannot convert null value to {0}.".FormatWith(CultureInfo.InvariantCulture, objectType)); 86 } 87 88 return null; 89 } 90 91 if (reader.TokenType != JsonToken.StartConstructor || !string.Equals(reader.Value.ToString(), "Date", StringComparison.Ordinal)) 92 { 93 throw JsonSerializationException.Create(reader, "Unexpected token or value when parsing date. Token: {0}, Value: {1}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType, reader.Value)); 94 } 95 96 reader.Read(); 97 98 if (reader.TokenType != JsonToken.Integer) 99 { 100 throw JsonSerializationException.Create(reader, "Unexpected token parsing date. Expected Integer, got {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); 101 } 102 103 long ticks = (long)reader.Value; 104 105 DateTime d = DateTimeUtils.ConvertJavaScriptTicksToDateTime(ticks); 106 107 reader.Read(); 108 109 if (reader.TokenType != JsonToken.EndConstructor) 110 { 111 throw JsonSerializationException.Create(reader, "Unexpected token parsing date. Expected EndConstructor, got {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); 112 } 113 114 #if !NET20 115 Type t = (ReflectionUtils.IsNullableType(objectType)) 116 ? Nullable.GetUnderlyingType(objectType) 117 : objectType; 118 if (t == typeof(DateTimeOffset)) 119 { 120 return new DateTimeOffset(d); 121 } 122 #endif 123 124 return d; 125 } 126 } 127 }