protected override LambdaExpression CreateGroupByExpression()
{
var memberAccessBuilder = ExpressionBuilderFactory.MemberAccess(this.Queryable, this.groupDescriptor.MemberType, this.groupDescriptor.Member);
memberAccessBuilder.ParameterExpression = this.ParameterExpression;
return(memberAccessBuilder.CreateLambdaExpression());
}
private LambdaExpression CreateMemberSelectorExpression()
{
var memberAccessBuilder = ExpressionBuilderFactory.MemberAccess(this.ItemType, null, this.Function.SourceField);
memberAccessBuilder.Options.CopyFrom(this.Options);
var memberExpression = memberAccessBuilder.CreateMemberAccessExpression();
memberExpression = ConvertMemberAccessExpression(memberExpression);
return(Expression.Lambda(memberExpression, memberAccessBuilder.ParameterExpression));
}
protected virtual Expression CreateMemberExpression()
{
var memberType = this.FilterDescriptor.MemberType;
var memberAccessBuilder =
ExpressionBuilderFactory.MemberAccess(this.ParameterExpression.Type, memberType, this.FilterDescriptor.Member);
memberAccessBuilder.Options.CopyFrom(this.Options);
memberAccessBuilder.ParameterExpression = this.ParameterExpression;
Expression memberAccessExpression = memberAccessBuilder.CreateMemberAccessExpression();
if (memberType != null && memberAccessExpression.Type.GetNonNullableType() != memberType.GetNonNullableType())
{
memberAccessExpression = Expression.Convert(memberAccessExpression, memberType);
}
return(memberAccessExpression);
}