public void NullDeserialization()
{
EntityMapping.AddMappingProcessor(new TypeDiscoveryProcessor());
EntityMapping.RegisterType(typeof(KnownBaseModel));
var serializer = TypeDiscoverySerializationProvider.Instance.GetSerializer(typeof(KnownBaseModel));
var document = new BsonDocument
{
{ "Item", BsonNull.Value }
};
KnownBaseModel deserializedResult;
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
deserializedResult = (KnownBaseModel)serializer.Deserialize(context);
}
Assert.IsNull(deserializedResult);
}
public void NullDeserialization()
{
var entityMapper = new EntityMapper <KnownBaseModel>();
var serializer = TypeDiscoverySerializationProvider.Instance.GetSerializer(typeof(KnownBaseModel));
var document = new BsonDocument
{
{ "Item", BsonNull.Value }
};
KnownBaseModel deserializedResult;
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
deserializedResult = (KnownBaseModel)serializer.Deserialize(context);
}
Assert.AreEqual(null, deserializedResult);
}
// protected methods
/// <summary>
/// Deserializes a value.
/// </summary>
/// <param name="context">The deserialization context.</param>
/// <param name="args">The deserialization args.</param>
/// <returns>The value.</returns>
protected override GeoJsonBoundingBox <TCoordinates> DeserializeValue(BsonDeserializationContext context, BsonDeserializationArgs args)
{
var bsonReader = context.Reader;
var flattenedArray = BsonArraySerializer.Instance.Deserialize(context);
if ((flattenedArray.Count % 2) != 0)
{
throw new FormatException("Bounding box array does not have an even number of values.");
}
var half = flattenedArray.Count / 2;
// create a dummy document with a min and a max and then deserialize the min and max coordinates from there
var document = new BsonDocument
{
{ "min", new BsonArray(flattenedArray.Take(half)) },
{ "max", new BsonArray(flattenedArray.Skip(half)) }
};
using (var documentReader = new BsonDocumentReader(document))
{
var documentContext = BsonDeserializationContext.CreateRoot(documentReader);
documentReader.ReadStartDocument();
documentReader.ReadName("min");
var min = _coordinatesSerializer.Deserialize(documentContext);
documentReader.ReadName("max");
var max = _coordinatesSerializer.Deserialize(documentContext);
documentReader.ReadEndDocument();
return(new GeoJsonBoundingBox <TCoordinates>(min, max));
}
}
private static BsonDocumentReader CreateVersionReader(BsonDocument document)
{
var reader = new BsonDocumentReader(document);
reader.ReadStartDocument();
reader.ReadName();
return(reader);
}
private object DeserializeKeyString(string keyString)
{
var keyDocument = new BsonDocument("k", keyString);
using (var keyReader = new BsonDocumentReader(keyDocument))
{
var context = BsonDeserializationContext.CreateRoot(keyReader);
keyReader.ReadStartDocument();
keyReader.ReadName("k");
var key = _keySerializer.Deserialize(context);
keyReader.ReadEndDocument();
return(key);
}
}
/// <summary>
/// Deserializes the value.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>The deserialized value.</returns>
public object DeserializeValue(BsonValue value)
{
var tempDocument = new BsonDocument("value", value);
using (var reader = new BsonDocumentReader(tempDocument))
{
var context = BsonDeserializationContext.CreateRoot <BsonDocument>(reader);
reader.ReadStartDocument();
reader.ReadName("value");
var deserializedValue = context.DeserializeWithChildContext(_serializer);
reader.ReadEndDocument();
return(deserializedValue);
}
}
public void ReserializingStringIdEntityMaintainsStateExceptNulls()
{
var foreignProperty = EntityMapping.GetOrCreateDefinition(typeof(StringIdModel)).GetIdProperty();
var serializer = new EntityNavigationCollectionSerializer <StringIdModel>(foreignProperty);
var initialCollection = new EntityNavigationCollection <StringIdModel>(foreignProperty)
{
new StringIdModel
{
Description = "1"
},
new StringIdModel
{
Id = "5ac383379a5f1303784400f8",
Description = "2"
}
};
EntityNavigationCollection <StringIdModel> deserializedCollection = null;
initialCollection.AddForeignId("5ac383379a5f1303784400f9");
var document = new BsonDocument();
using (var writer = new BsonDocumentWriter(document))
{
writer.WriteStartDocument();
writer.WriteName("Items");
var context = BsonSerializationContext.CreateRoot(writer);
serializer.Serialize(context, initialCollection);
writer.WriteEndDocument();
}
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
deserializedCollection = serializer.Deserialize(context) as EntityNavigationCollection <StringIdModel>;
}
Assert.AreEqual(3, initialCollection.GetForeignIds().Count());
Assert.AreEqual(2, deserializedCollection.GetForeignIds().Count());
Assert.IsTrue(deserializedCollection.GetForeignIds().All(id => initialCollection.GetForeignIds().Contains(id)));
}
// public methods
/// <summary>
/// Gets an enumerator for the result objects.
/// </summary>
/// <returns>An enumerator for the result objects.</returns>
public IEnumerator <TResult> GetEnumerator()
{
foreach (var value in _source)
{
var document = new BsonDocument("_v", value);
using (var bsonReader = new BsonDocumentReader(document))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
bsonReader.ReadName("_v");
yield return((TResult)_serializationInfo.Serializer.Deserialize(context));
bsonReader.ReadEndDocument();
}
}
}
public void ReserializingObjectIdIdEntityMaintainsState()
{
var foreignProperty = EntityMapping.GetOrCreateDefinition(typeof(ObjectIdIdModel)).GetIdProperty();
var serializer = new EntityNavigationCollectionSerializer <ObjectIdIdModel>(foreignProperty);
var initialCollection = new EntityNavigationCollection <ObjectIdIdModel>(foreignProperty)
{
new ObjectIdIdModel
{
Id = ObjectId.GenerateNewId(),
Description = "1"
}
};
EntityNavigationCollection <ObjectIdIdModel> deserializedCollection = null;
initialCollection.AddForeignId(ObjectId.GenerateNewId());
var document = new BsonDocument();
using (var writer = new BsonDocumentWriter(document))
{
writer.WriteStartDocument();
writer.WriteName("Items");
var context = BsonSerializationContext.CreateRoot(writer);
serializer.Serialize(context, initialCollection);
writer.WriteEndDocument();
}
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
deserializedCollection = serializer.Deserialize(context) as EntityNavigationCollection <ObjectIdIdModel>;
}
Assert.AreEqual(2, initialCollection.GetForeignIds().Count());
Assert.AreEqual(2, deserializedCollection.GetForeignIds().Count());
Assert.IsTrue(initialCollection.GetForeignIds().All(id => deserializedCollection.GetForeignIds().Contains(id)));
}
public void SerializeICollectionCompatibleButIsntEntityNavigationCollection()
{
var serializer = new EntityNavigationCollectionSerializer <ObjectIdIdModel>("Id");
var initialCollection = new List <ObjectIdIdModel>
{
new ObjectIdIdModel
{
Id = ObjectId.GenerateNewId(),
Description = "1"
}
};
EntityNavigationCollection <ObjectIdIdModel> deserializedCollection = null;
var document = new BsonDocument();
using (var writer = new BsonDocumentWriter(document))
{
writer.WriteStartDocument();
writer.WriteName("Items");
var context = BsonSerializationContext.CreateRoot(writer);
serializer.Serialize(context, initialCollection);
writer.WriteEndDocument();
}
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
deserializedCollection = serializer.Deserialize(context) as EntityNavigationCollection <ObjectIdIdModel>;
}
Assert.AreEqual(1, initialCollection.Count());
Assert.AreEqual(1, deserializedCollection.GetForeignIds().Count());
Assert.IsTrue(initialCollection.Select(e => e.Id).All(id => deserializedCollection.GetForeignIds().Contains(id)));
}
public void DeserializingInvalidTypeThrowsException()
{
var serializer = new EntityNavigationCollectionSerializer <StringIdModel>("Id");
var document = new BsonDocument(new Dictionary <string, object>
{
{ "Items", false }
});
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
serializer.Deserialize(context);
}
}
public void DeserializingInvalidTypeThrowsException()
{
var foreignProperty = EntityMapping.GetOrCreateDefinition(typeof(StringIdModel)).GetIdProperty();
var serializer = new EntityNavigationCollectionSerializer <StringIdModel>(foreignProperty);
var document = new BsonDocument(new Dictionary <string, object>
{
{ "Items", false }
});
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
serializer.Deserialize(context);
}
}
public void DeserializingNullReturnsCollection()
{
var serializer = new EntityNavigationCollectionSerializer <StringIdModel>("Id");
var document = new BsonDocument(new Dictionary <string, object>
{
{ "Items", null }
});
using (var reader = new BsonDocumentReader(document))
{
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
var result = serializer.Deserialize(context);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(EntityNavigationCollection <StringIdModel>));
}
}
public static UpdateDefinition <TEntity> Set <TEntity>(this UpdateDefinition <TEntity> definition, string fieldName, BsonValue value)
{
var dotNetValue = BsonTypeMapper.MapToDotNetValue(value);
var valueType = dotNetValue?.GetType();
var reflectedProperty = typeof(TEntity).GetNestedProperty(fieldName);
var reflectedValueType = reflectedProperty?.PropertyType;
if (valueType == null && reflectedValueType == null)
{
//For null values - they don't have any type data associated
valueType = typeof(object);
}
else if (valueType == null || (reflectedValueType != null && valueType != reflectedValueType))
{
//Where BsonTypeMapper can't determine the type or it is a mismatch to what is reflected from the type
//The preference is on the reflected type and the serializer on the specific member
valueType = reflectedValueType;
//We will need the serializer defined for the specific member
//Not all serializers will be registered (eg. EntityNavigationSerializer) so we need to look it up manually
var declaringClassMap = BsonClassMap.LookupClassMap(reflectedProperty.DeclaringType);
var memberMap = declaringClassMap.GetMemberMap(reflectedProperty.Name);
var serializer = memberMap.GetSerializer();
//To prevent re-serializing back to a string, we use the BsonDocumentReader over JsonReader
//Using BsonDocumentReader means the root must be a BsonDocument. Because the value may be a BsonArray, we need to wrap the value.
var containerDocument = new BsonDocument
{
{ "Value", value }
};
using (var reader = new BsonDocumentReader(containerDocument))
{
//Get the reader into a state where the serializer is starting on the right element
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
dotNetValue = serializer.Deserialize(context);
}
}
var typeArgs = new[] { typeof(TEntity), valueType };
var specificDefinitionType = typeof(StringFieldDefinition <,>).MakeGenericType(typeArgs);
var specificDefinition = Activator.CreateInstance(specificDefinitionType, fieldName, null); //ie. StringFieldDefintion<TEntity, valueType>
var expressionType = typeof(Expression);
var setMethod = typeof(MongoDB.Driver.UpdateDefinitionExtensions)
.GetMethods()
.Where(m => m.Name == "Set" && !m.GetParameters().Any(p => expressionType.IsAssignableFrom(p.ParameterType)))
.FirstOrDefault()
.MakeGenericMethod(typeArgs);
//Breaking down the above reflection, we are trying to get the "Set" method that doesn't take an "Expression" as a parameter
//The method we want takes an `UpdateDefinition`, `FieldDefinition` and `Value` as the 3 parameters
//Accounting for the variables and types, the method call would look something, something like the following
//MongoDB.Driver.UpdateDefinitionExtensions.Set<TEntity, TField>(UpdateDefinition<TEntity> definition, StringFieldDefinition<TEntity, TField> specificDefinition, dotNetValue)
var result = setMethod.Invoke(null, new[] { definition, specificDefinition, dotNetValue });
return(result as UpdateDefinition <TEntity>);
}
public static UpdateDefinition <TEntity> Set <TEntity>(this UpdateDefinition <TEntity> definition, string fieldName, BsonValue value) where TEntity : class
{
var dotNetValue = BsonTypeMapper.MapToDotNetValue(value);
var valueType = dotNetValue?.GetType();
IEntityProperty propertyDefinition = null;
if (EntityMapping.IsValidTypeToMap(typeof(TEntity)))
{
propertyDefinition = EntityMapping.GetOrCreateDefinition(typeof(TEntity))
.TraverseProperties()
.Where(p => p.FullPath == fieldName)
.FirstOrDefault();
}
var propertyType = propertyDefinition?.PropertyType;
if (valueType == null && propertyType == null)
{
//For null values - they don't have any type data associated
valueType = typeof(object);
}
else if (valueType == null || (propertyType != null && valueType != propertyType))
{
//Where BsonTypeMapper can't determine the type or it is a mismatch to what is set in the entity definition
//The preference is on the definition type and the serializer on the specific member
valueType = propertyType;
//We will need the serializer defined for the specific member
//Not all serializers will be registered (eg. EntityNavigationSerializer) so we need to look it up manually
var declaringClassMap = BsonClassMap.LookupClassMap(propertyDefinition.EntityType);
var memberMap = declaringClassMap.GetMemberMapForElement(propertyDefinition.ElementName);
var serializer = memberMap.GetSerializer();
//To prevent re-serializing back to a string, we use the BsonDocumentReader over JsonReader
//Using BsonDocumentReader means the root must be a BsonDocument. Because the value may be a BsonArray, we need to wrap the value.
var containerDocument = new BsonDocument
{
{ "Value", value }
};
using (var reader = new BsonDocumentReader(containerDocument))
{
//Get the reader into a state where the serializer is starting on the right element
reader.ReadBsonType();
reader.ReadStartDocument();
reader.ReadBsonType();
reader.SkipName();
var context = BsonDeserializationContext.CreateRoot(reader);
dotNetValue = serializer.Deserialize(context);
}
}
var typeArgs = new[] { typeof(TEntity), valueType };
var specificDefinitionType = typeof(StringFieldDefinition <,>).MakeGenericType(typeArgs);
var specificDefinition = Activator.CreateInstance(specificDefinitionType, fieldName, null); //ie. StringFieldDefintion<TEntity, valueType>
foreach (var method in typeof(UpdateDefinitionExtensions).GetMethods(BindingFlags.NonPublic | BindingFlags.Static))
{
if (method.Name == nameof(InternalSet))
{
var internalSetMethod = method.MakeGenericMethod(typeArgs);
var result = internalSetMethod.Invoke(null, new[] { definition, specificDefinition, dotNetValue });
return(result as UpdateDefinition <TEntity>);
}
}
return(default);
