// public methods
/// <summary>
/// Applies a modification to the member map.
/// </summary>
/// <param name="memberMap">The member map.</param>
public virtual void Apply(BsonMemberMap memberMap)
{
var memberSerializer = memberMap.GetSerializer(memberMap.MemberType);
var memberSerializationOptions = memberMap.SerializationOptions;
if (memberSerializationOptions == null)
{
var memberDefaultSerializationOptions = memberSerializer.GetDefaultSerializationOptions();
if (memberDefaultSerializationOptions == null)
{
var message = string.Format(
"A serialization options attribute of type {0} cannot be used when the serializer is of type {1}.",
BsonUtils.GetFriendlyTypeName(this.GetType()),
BsonUtils.GetFriendlyTypeName(memberSerializer.GetType()));
throw new NotSupportedException(message);
}
memberSerializationOptions = memberDefaultSerializationOptions.Clone();
memberMap.SetSerializationOptions(memberSerializationOptions);
}
memberSerializationOptions.ApplyAttribute(memberSerializer, this);
}
private void DeserializeMember(BsonReader bsonReader, object obj, BsonMemberMap memberMap)
{
try
{
object value;
var nominalType = memberMap.MemberType;
var bsonType = bsonReader.GetCurrentBsonType();
if (bsonType == BsonType.Null && nominalType.IsInterface)
{
bsonReader.ReadNull();
value = null;
}
else
{
Type actualType;
if (bsonType == BsonType.Null)
{
actualType = nominalType;
}
else
{
var discriminatorConvention = memberMap.GetDiscriminatorConvention();
actualType = discriminatorConvention.GetActualType(bsonReader, nominalType); // returns nominalType if no discriminator found
}
var serializer = memberMap.GetSerializer(actualType);
value = serializer.Deserialize(bsonReader, nominalType, actualType, memberMap.SerializationOptions);
}
memberMap.Setter(obj, value);
}
catch (Exception ex)
{
var message = string.Format(
"An error occurred while deserializing the {0} {1} of class {2}: {3}", // terminating period provided by nested message
memberMap.MemberName, (memberMap.MemberInfo.MemberType == MemberTypes.Field) ? "field" : "property", obj.GetType().FullName, ex.Message);
throw new FileFormatException(message, ex);
}
}
private void SerializeMember(BsonWriter bsonWriter, object obj, BsonMemberMap memberMap)
{
var value = memberMap.Getter(obj);
if (!memberMap.ShouldSerialize(obj, value))
{
return; // don't serialize member
}
bsonWriter.WriteName(memberMap.ElementName);
var nominalType = memberMap.MemberType;
if (value == null && nominalType.IsInterface)
{
bsonWriter.WriteNull();
}
else
{
var actualType = (value == null) ? nominalType : value.GetType();
var serializer = memberMap.GetSerializer(actualType);
serializer.Serialize(bsonWriter, nominalType, value, memberMap.SerializationOptions);
}
}
private void DeserializeExtraElement(
BsonReader bsonReader,
object obj,
string elementName,
BsonMemberMap extraElementsMemberMap)
{
if (extraElementsMemberMap.MemberType == typeof(BsonDocument))
{
var extraElements = (BsonDocument)extraElementsMemberMap.Getter(obj);
if (extraElements == null)
{
extraElements = new BsonDocument();
extraElementsMemberMap.Setter(obj, extraElements);
}
var bsonValue = (BsonValue)BsonValueSerializer.Instance.Deserialize(bsonReader, typeof(BsonValue), null);
extraElements[elementName] = bsonValue;
}
else
{
var extraElements = (IDictionary <string, object>)extraElementsMemberMap.Getter(obj);
if (extraElements == null)
{
if (extraElementsMemberMap.MemberType == typeof(IDictionary <string, object>))
{
extraElements = new Dictionary <string, object>();
}
else
{
extraElements = (IDictionary <string, object>)Activator.CreateInstance(extraElementsMemberMap.MemberType);
}
extraElementsMemberMap.Setter(obj, extraElements);
}
var bsonValue = (BsonValue)BsonValueSerializer.Instance.Deserialize(bsonReader, typeof(BsonValue), null);
extraElements[elementName] = BsonTypeMapper.MapToDotNetValue(bsonValue);
}
}
/// <summary>
/// Serializes an object to a BsonWriter.
/// </summary>
/// <param name="bsonWriter">The BsonWriter.</param>
/// <param name="nominalType">The nominal type.</param>
/// <param name="value">The object.</param>
/// <param name="options">The serialization options.</param>
public void Serialize(
BsonWriter bsonWriter,
Type nominalType,
object value,
IBsonSerializationOptions options)
{
if (value == null)
{
bsonWriter.WriteNull();
}
else
{
// Nullable types are weird because they get boxed as their underlying value type
// we can best handle that by switching the nominalType to the underlying value type
// (so VerifyNominalType doesn't fail and we don't get an unnecessary discriminator)
if (nominalType.IsGenericType && nominalType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
nominalType = nominalType.GetGenericArguments()[0];
}
VerifyNominalType(nominalType);
var actualType = (value == null) ? nominalType : value.GetType();
if (actualType != _classMap.ClassType)
{
var message = string.Format("BsonClassMapSerializer.Serialize for type {0} was called with actualType {1}.",
BsonUtils.GetFriendlyTypeName(_classMap.ClassType), BsonUtils.GetFriendlyTypeName(actualType));
throw new BsonSerializationException(message);
}
var documentSerializationOptions = (options ?? DocumentSerializationOptions.Defaults) as DocumentSerializationOptions;
if (documentSerializationOptions == null)
{
var message = string.Format(
"Serializer BsonClassMapSerializer expected serialization options of type {0}, not {1}.",
BsonUtils.GetFriendlyTypeName(typeof(DocumentSerializationOptions)),
BsonUtils.GetFriendlyTypeName(options.GetType()));
throw new BsonSerializationException(message);
}
bsonWriter.WriteStartDocument();
BsonMemberMap idMemberMap = null;
if (documentSerializationOptions.SerializeIdFirst)
{
idMemberMap = _classMap.IdMemberMap;
if (idMemberMap != null)
{
SerializeMember(bsonWriter, value, idMemberMap);
}
}
if (actualType != nominalType || _classMap.DiscriminatorIsRequired || _classMap.HasRootClass)
{
// never write out a discriminator for an anonymous class
if (!_classMap.IsAnonymous)
{
var discriminatorConvention = _classMap.GetDiscriminatorConvention();
var discriminator = discriminatorConvention.GetDiscriminator(nominalType, actualType);
if (discriminator != null)
{
bsonWriter.WriteName(discriminatorConvention.ElementName);
BsonValueSerializer.Instance.Serialize(bsonWriter, typeof(BsonValue), discriminator, null);
}
}
}
var allMemberMaps = _classMap.AllMemberMaps;
var extraElementsMemberMapIndex = _classMap.ExtraElementsMemberMapIndex;
for (var memberMapIndex = 0; memberMapIndex < allMemberMaps.Count; ++memberMapIndex)
{
var memberMap = allMemberMaps[memberMapIndex];
// note: if serializeIdFirst is false then idMemberMap will be null (so no property will be skipped)
if (memberMap != idMemberMap)
{
if (memberMapIndex != extraElementsMemberMapIndex)
{
SerializeMember(bsonWriter, value, memberMap);
}
else
{
SerializeExtraElements(bsonWriter, value, memberMap);
}
}
}
bsonWriter.WriteEndDocument();
}
}
private void SerializeMember(BsonWriter bsonWriter, object obj, BsonMemberMap memberMap)
{
var value = memberMap.Getter(obj);
if (!memberMap.ShouldSerialize(obj, value))
{
return; // don't serialize member
}
bsonWriter.WriteName(memberMap.ElementName);
var nominalType = memberMap.MemberType;
if (value == null && nominalType.IsInterface)
{
bsonWriter.WriteNull();
}
else
{
var actualType = (value == null) ? nominalType : value.GetType();
var serializer = memberMap.GetSerializer(actualType);
serializer.Serialize(bsonWriter, nominalType, value, memberMap.SerializationOptions);
}
}
private void SerializeExtraElements(BsonWriter bsonWriter, object obj, BsonMemberMap extraElementsMemberMap)
{
var extraElements = extraElementsMemberMap.Getter(obj);
if (extraElements != null)
{
if (extraElementsMemberMap.MemberType == typeof(BsonDocument))
{
var bsonDocument = (BsonDocument)extraElements;
foreach (var element in bsonDocument)
{
bsonWriter.WriteName(element.Name);
BsonValueSerializer.Instance.Serialize(bsonWriter, typeof(BsonValue), element.Value, null);
}
}
else
{
var dictionary = (IDictionary<string, object>)extraElements;
foreach (var key in dictionary.Keys)
{
bsonWriter.WriteName(key);
var value = dictionary[key];
if (value == null)
{
bsonWriter.WriteNull();
}
else
{
var bsonValue = BsonTypeMapper.MapToBsonValue(dictionary[key]);
BsonValueSerializer.Instance.Serialize(bsonWriter, typeof(BsonValue), bsonValue, null);
}
}
}
}
}
private object DeserializeMemberValue(BsonReader bsonReader, BsonMemberMap memberMap)
{
try
{
var nominalType = memberMap.MemberType;
var bsonType = bsonReader.GetCurrentBsonType();
if (bsonType == BsonType.Null && nominalType.IsInterface)
{
bsonReader.ReadNull();
return null;
}
Type actualType;
if (bsonType == BsonType.Null)
{
actualType = nominalType;
}
else
{
var discriminatorConvention = memberMap.GetDiscriminatorConvention();
actualType = discriminatorConvention.GetActualType(bsonReader, nominalType); // returns nominalType if no discriminator found
}
var serializer = memberMap.GetSerializer(actualType);
return serializer.Deserialize(bsonReader, nominalType, actualType, memberMap.SerializationOptions);
}
catch (Exception ex)
{
var message = string.Format(
"An error occurred while deserializing the {0} {1} of class {2}: {3}", // terminating period provided by nested message
memberMap.MemberName, (memberMap.MemberInfo.MemberType == MemberTypes.Field) ? "field" : "property", memberMap.ClassMap.ClassType.FullName, ex.Message);
throw new FileFormatException(message, ex);
}
}
private void DeserializeExtraElement(
BsonReader bsonReader,
object obj,
string elementName,
BsonMemberMap extraElementsMemberMap)
{
if (extraElementsMemberMap.MemberType == typeof(BsonDocument))
{
var extraElements = (BsonDocument)extraElementsMemberMap.Getter(obj);
if (extraElements == null)
{
extraElements = new BsonDocument();
extraElementsMemberMap.Setter(obj, extraElements);
}
var bsonValue = (BsonValue)BsonValueSerializer.Instance.Deserialize(bsonReader, typeof(BsonValue), null);
extraElements[elementName] = bsonValue;
}
else
{
var extraElements = (IDictionary<string, object>)extraElementsMemberMap.Getter(obj);
if (extraElements == null)
{
if (extraElementsMemberMap.MemberType == typeof(IDictionary<string, object>))
{
extraElements = new Dictionary<string, object>();
}
else
{
extraElements = (IDictionary<string, object>)Activator.CreateInstance(extraElementsMemberMap.MemberType);
}
extraElementsMemberMap.Setter(obj, extraElements);
}
var bsonValue = (BsonValue)BsonValueSerializer.Instance.Deserialize(bsonReader, typeof(BsonValue), null);
extraElements[elementName] = BsonTypeMapper.MapToDotNetValue(bsonValue);
}
}
