/// <summary>
/// We are using the whole entity in a new select projection. Re-bind any ElasticField references to JObject
/// and ensure the entity parameter is a freshly materialized entity object from our default materializer.
/// </summary>
/// <param name="selectExpression">Select expression to re-bind.</param>
/// <param name="entityParameter">Parameter that references the whole entity.</param>
void RebindElasticFieldsAndChainProjector(Expression selectExpression, ParameterExpression entityParameter)
{
var projection = ElasticFieldsExpressionVisitor.Rebind(SourceType, Mapping, selectExpression);
var compiled = Expression.Lambda(projection.Item1, entityParameter, projection.Item2).Compile();
itemProjector = h => compiled.DynamicInvoke(DefaultItemProjector(h), h);
}
internal static Tuple <Expression, ParameterExpression> Rebind(Type sourceType, IElasticMapping mapping, Expression selector)
{
var parameter = Expression.Parameter(typeof(Hit), "h");
var visitor = new ElasticFieldsExpressionVisitor(sourceType, parameter, mapping);
Argument.CheckNotNull("selector", selector);
return(Tuple.Create(visitor.Visit(selector), parameter));
}
