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);
}
}
// 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 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 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 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);
}
}
