/// <summary>
/// Deserializes an object from a BsonReader.
/// </summary>
/// <param name="bsonReader">The BsonReader.</param>
/// <param name="nominalType">The nominal type of the object.</param>
/// <param name="actualType">The actual type of the object.</param>
/// <param name="options">The serialization options.</param>
/// <returns>An object.</returns>
public object Deserialize(
BsonReader bsonReader,
Type nominalType,
Type actualType,
IBsonSerializationOptions options)
{
VerifyNominalType(nominalType);
var bsonType = bsonReader.GetCurrentBsonType();
if (bsonType == Bson.BsonType.Null)
{
bsonReader.ReadNull();
return(null);
}
else
{
if (actualType != _classMap.ClassType)
{
var message = string.Format("BsonClassMapSerializer.Deserialize for type {0} was called with actualType {1}.",
BsonUtils.GetFriendlyTypeName(_classMap.ClassType), BsonUtils.GetFriendlyTypeName(actualType));
throw new BsonSerializationException(message);
}
if (actualType.IsValueType)
{
var message = string.Format("Value class {0} cannot be deserialized.", actualType.FullName);
throw new BsonSerializationException(message);
}
if (_classMap.IsAnonymous)
{
throw new InvalidOperationException("An anonymous class cannot be deserialized.");
}
var obj = _classMap.CreateInstance();
if (bsonType != BsonType.Document)
{
var message = string.Format(
"Expected a nested document representing the serialized form of a {0} value, but found a value of type {1} instead.",
actualType.FullName, bsonType);
throw new FileFormatException(message);
}
var supportsInitialization = obj as ISupportInitialize;
if (supportsInitialization != null)
{
supportsInitialization.BeginInit();
}
var discriminatorConvention = _classMap.GetDiscriminatorConvention();
var fastMemberMapFinder = new FastMemberMapFinder(_classMap);
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
var elementName = bsonReader.ReadName();
if (elementName == discriminatorConvention.ElementName)
{
bsonReader.SkipValue(); // skip over discriminator
continue;
}
var memberMap = fastMemberMapFinder.GetMemberMapForElement(elementName);
if (memberMap != null)
{
if (memberMap.IsReadOnly)
{
bsonReader.SkipValue();
}
else
{
DeserializeMember(bsonReader, obj, memberMap);
}
}
else
{
if (_classMap.ExtraElementsMemberMap != null)
{
DeserializeExtraElement(bsonReader, obj, elementName, _classMap.ExtraElementsMemberMap);
}
else if (_classMap.IgnoreExtraElements)
{
bsonReader.SkipValue();
}
else
{
var message = string.Format(
"Element '{0}' does not match any field or property of class {1}.",
elementName, _classMap.ClassType.FullName);
throw new FileFormatException(message);
}
}
}
bsonReader.ReadEndDocument();
// check any members left over that we didn't have elements for
if (fastMemberMapFinder.HasLeftOverMemberMaps())
{
foreach (var memberMap in fastMemberMapFinder.GetLeftOverMemberMaps())
{
if (memberMap.IsReadOnly)
{
continue;
}
if (memberMap.IsRequired)
{
var fieldOrProperty = (memberMap.MemberInfo.MemberType == MemberTypes.Field) ? "field" : "property";
var message = string.Format(
"Required element '{0}' for {1} '{2}' of class {3} is missing.",
memberMap.ElementName, fieldOrProperty, memberMap.MemberName, _classMap.ClassType.FullName);
throw new FileFormatException(message);
}
memberMap.ApplyDefaultValue(obj);
}
}
if (supportsInitialization != null)
{
supportsInitialization.EndInit();
}
return(obj);
}
}
/// <summary>
/// Deserializes an object from a BsonReader.
/// </summary>
/// <param name="bsonReader">The BsonReader.</param>
/// <param name="nominalType">The nominal type of the object.</param>
/// <param name="actualType">The actual type of the object.</param>
/// <param name="options">The serialization options.</param>
/// <returns>An object.</returns>
public object Deserialize(
BsonReader bsonReader,
Type nominalType,
Type actualType,
IBsonSerializationOptions options)
{
VerifyNominalType(nominalType);
var bsonType = bsonReader.GetCurrentBsonType();
if (bsonType == Bson.BsonType.Null)
{
bsonReader.ReadNull();
return null;
}
else
{
if (actualType != _classMap.ClassType)
{
var message = string.Format("BsonClassMapSerializer.Deserialize for type {0} was called with actualType {1}.",
BsonUtils.GetFriendlyTypeName(_classMap.ClassType), BsonUtils.GetFriendlyTypeName(actualType));
throw new BsonSerializationException(message);
}
if (actualType.IsValueType)
{
var message = string.Format("Value class {0} cannot be deserialized.", actualType.FullName);
throw new BsonSerializationException(message);
}
if (_classMap.IsAnonymous)
{
throw new InvalidOperationException("An anonymous class cannot be deserialized.");
}
var obj = _classMap.CreateInstance();
if (bsonType != BsonType.Document)
{
var message = string.Format(
"Expected a nested document representing the serialized form of a {0} value, but found a value of type {1} instead.",
actualType.FullName, bsonType);
throw new FileFormatException(message);
}
var supportsInitialization = obj as ISupportInitialize;
if (supportsInitialization != null)
{
supportsInitialization.BeginInit();
}
var discriminatorConvention = _classMap.GetDiscriminatorConvention();
var fastMemberMapFinder = new FastMemberMapFinder(_classMap);
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
var elementName = bsonReader.ReadName();
if (elementName == discriminatorConvention.ElementName)
{
bsonReader.SkipValue(); // skip over discriminator
continue;
}
var memberMap = fastMemberMapFinder.GetMemberMapForElement(elementName);
if (memberMap != null)
{
if (memberMap.IsReadOnly)
{
bsonReader.SkipValue();
}
else
{
DeserializeMember(bsonReader, obj, memberMap);
}
}
else
{
if (_classMap.ExtraElementsMemberMap != null)
{
DeserializeExtraElement(bsonReader, obj, elementName, _classMap.ExtraElementsMemberMap);
}
else if (_classMap.IgnoreExtraElements)
{
bsonReader.SkipValue();
}
else
{
var message = string.Format(
"Element '{0}' does not match any field or property of class {1}.",
elementName, _classMap.ClassType.FullName);
throw new FileFormatException(message);
}
}
}
bsonReader.ReadEndDocument();
// check any members left over that we didn't have elements for
if (fastMemberMapFinder.HasLeftOverMemberMaps())
{
foreach (var memberMap in fastMemberMapFinder.GetLeftOverMemberMaps())
{
if (memberMap.IsReadOnly)
{
continue;
}
if (memberMap.IsRequired)
{
var fieldOrProperty = (memberMap.MemberInfo.MemberType == MemberTypes.Field) ? "field" : "property";
var message = string.Format(
"Required element '{0}' for {1} '{2}' of class {3} is missing.",
memberMap.ElementName, fieldOrProperty, memberMap.MemberName, _classMap.ClassType.FullName);
throw new FileFormatException(message);
}
memberMap.ApplyDefaultValue(obj);
}
}
if (supportsInitialization != null)
{
supportsInitialization.EndInit();
}
return obj;
}
}
