internal override RenderedProjectionDefinition <TProjection> TranslateExpressionToFindProjection <TSource, TProjection>(
Expression <Func <TSource, TProjection> > expression,
IBsonSerializer <TSource> sourceSerializer,
IBsonSerializerRegistry serializerRegistry)
{
return(FindProjectionTranslator.Translate <TSource, TProjection>(expression, sourceSerializer, serializerRegistry));
}
/// <summary>
/// Projections the specified source.
/// </summary>
/// <typeparam name="TDocument">The type of the document.</typeparam>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <typeparam name="TNewResult">The type of the new result.</typeparam>
/// <param name="source">The source.</param>
/// <param name="projection">The projection.</param>
/// <returns>The fluent find interface.</returns>
public static IFindFluent <TDocument, TNewResult> Projection <TDocument, TResult, TNewResult>(this IFindFluent <TDocument, TResult> source, Expression <Func <TDocument, TNewResult> > projection)
{
Ensure.IsNotNull(source, "source");
Ensure.IsNotNull(projection, "projection");
var parameterSerializer = source.Collection.Settings.SerializerRegistry.GetSerializer <TDocument>();
var projectionInfo = FindProjectionTranslator.Translate <TDocument, TNewResult>(projection, parameterSerializer);
return(source.Projection <TNewResult>(projectionInfo.Projection, projectionInfo.Serializer));
}
private ProjectedResult <T> Project <T>(Expression <Func <Root, T> > projector, string json)
{
var serializer = BsonSerializer.SerializerRegistry.GetSerializer <Root>();
var projectionInfo = FindProjectionTranslator.Translate <Root, T>(projector, serializer);
using (var reader = new JsonReader(json))
{
var context = BsonDeserializationContext.CreateRoot(reader);
return(new ProjectedResult <T>
{
Projection = projectionInfo.Document,
Value = projectionInfo.ProjectionSerializer.Deserialize(context)
});
}
}
/// <inheritdoc />
public override RenderedProjectionDefinition <TProjection> Render(IBsonSerializer <TSource> sourceSerializer, IBsonSerializerRegistry serializerRegistry)
{
return(FindProjectionTranslator.Translate <TSource, TProjection>(_expression, sourceSerializer));
}
