public object Deserialize(
BsonReader bsonReader,
Type classType
)
{
// peek at the discriminator (if present) to see what class to create an instance for
var discriminator = bsonReader.FindString("_t");
if (discriminator != null) {
var actualType = BsonClassMap.LookupTypeByDiscriminator(classType, discriminator);
if (!classType.IsAssignableFrom(actualType)) {
string message = string.Format("Actual type {0} is not assignable to expected type {1}", actualType.FullName, classType.FullName);
throw new FileFormatException(message);
}
classType = actualType;
}
var classMap = BsonClassMap.LookupClassMap(classType);
if (classMap.IsAnonymous) {
throw new InvalidOperationException("Anonymous classes cannot be deserialized");
}
var obj = Activator.CreateInstance(classType);
var missingElementPropertyMaps = new List<BsonPropertyMap>(classMap.PropertyMaps); // make a copy!
bsonReader.ReadStartDocument();
BsonType bsonType;
string elementName;
while (bsonReader.HasElement(out bsonType, out elementName)) {
if (elementName == "_t") {
bsonReader.ReadString("_t"); // skip over discriminator
continue;
}
var propertyMap = classMap.GetPropertyMapForElement(elementName);
if (propertyMap != null) {
propertyMap.PropertySerializer.DeserializeProperty(bsonReader, obj, propertyMap);
missingElementPropertyMaps.Remove(propertyMap);
} else {
if (classMap.IgnoreExtraElements) {
bsonReader.SkipElement();
} else {
string message = string.Format("Unexpected element: {0}", elementName);
throw new FileFormatException(message);
}
}
}
bsonReader.ReadEndDocument();
foreach (var propertyMap in missingElementPropertyMaps) {
if (propertyMap.IsRequired) {
string message = string.Format("Required element is missing: {0}", propertyMap.ElementName);
throw new BsonSerializationException(message);
}
if (propertyMap.HasDefaultValue) {
propertyMap.ApplyDefaultValue(obj);
}
}
return obj;
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
BsonType bsonType = bsonReader.PeekBsonType();
byte value;
if (bsonType == BsonType.Int32) {
value = (byte) bsonReader.ReadInt32(propertyMap.ElementName);
} else if (bsonType == BsonType.Document) {
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("_t", typeof(byte).FullName);
value = (byte) bsonReader.ReadInt32("v");
bsonReader.ReadEndDocument();
} else {
throw new FileFormatException("Element is not valid System.Byte");
}
propertyMap.Setter(obj, value);
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
var bsonType = bsonReader.PeekBsonType();
BsonNull value;
if (bsonType == BsonType.Document) {
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("$null", "c#null");
bsonReader.ReadEndDocument();
value = null;
} else {
bsonReader.ReadNull(propertyMap.ElementName);
value = Bson.Null;
}
propertyMap.Setter(obj, value);
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
BsonType bsonType = bsonReader.PeekBsonType();
TimeSpan value;
if (bsonType == BsonType.Int64) {
value = new TimeSpan(bsonReader.ReadInt64(propertyMap.ElementName));
} else if (bsonType == BsonType.Document) {
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("_t", typeof(TimeSpan).FullName);
value = TimeSpan.Parse(bsonReader.ReadString("v"));
bsonReader.ReadEndDocument();
} else {
throw new FileFormatException("Element is not valid System.TimeSpan");
}
propertyMap.Setter(obj, value);
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
BsonType bsonType = bsonReader.PeekBsonType();
double doubleValue;
if (bsonType == BsonType.Double) {
doubleValue = bsonReader.ReadDouble(propertyMap.ElementName);
} else if (bsonType == BsonType.Document) {
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("_t", typeof(float).FullName);
doubleValue = bsonReader.ReadDouble("v");
bsonReader.ReadEndDocument();
} else {
throw new FileFormatException("Element is not valid System.Single");
}
var value = doubleValue == double.MinValue ? float.MinValue : doubleValue == double.MaxValue ? float.MaxValue : (float) doubleValue;
propertyMap.Setter(obj, value);
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("_t", typeof(Decimal).FullName);
var value = XmlConvert.ToDecimal(bsonReader.ReadString("v"));
bsonReader.ReadEndDocument();
propertyMap.Setter(obj, value);
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
BsonType bsonType = bsonReader.PeekBsonType();
DateTimeOffset value;
if (bsonType == BsonType.Array) {
bsonReader.ReadArrayName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
var dateTime = new DateTime(bsonReader.ReadInt64("0"));
var offset = new TimeSpan(bsonReader.ReadInt64("1"));
bsonReader.ReadEndDocument();
value = new DateTimeOffset(dateTime, offset);
} else if (bsonType == BsonType.Document) {
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("_t", typeof(DateTimeOffset).FullName);
var dateTime = DateTime.Parse(bsonReader.ReadString("dt")); // Kind = DateTimeKind.Unspecified
var offset = TimeSpan.Parse(bsonReader.ReadString("o"));
bsonReader.ReadEndDocument();
value = new DateTimeOffset(dateTime, offset);
} else {
throw new FileFormatException("Element is not valid System.DateTimeOffset");
}
propertyMap.Setter(obj, value);
}
public void DeserializeProperty(
BsonReader bsonReader,
object obj,
BsonPropertyMap propertyMap
)
{
bsonReader.ReadDocumentName(propertyMap.ElementName);
bsonReader.ReadStartDocument();
bsonReader.VerifyString("_t", typeof(CultureInfo).FullName);
var value = new CultureInfo(bsonReader.ReadString("v"));
bsonReader.ReadEndDocument();
propertyMap.Setter(obj, value);
}