public static MemberInfo[] GetMemberPath(Expression expression)
{
var memberVisitor = new MemberVisitor();
memberVisitor.Visit(expression);
return(memberVisitor.MemberPath.ToArray());
}
private MemberPaths GetMemberPaths <TResult>(Expression <Func <TResult, object> >[] membersToExpand)
{
return(membersToExpand.Select(expr =>
{
var visitor = new MemberVisitor();
visitor.Visit(expr);
return visitor.MemberPath;
}));
}
public IQueryable <TResult> To <TResult>(object parameters = null, params Expression <Func <TResult, object> >[] membersToExpand)
{
var members = membersToExpand.Select(expr =>
{
var visitor = new MemberVisitor();
visitor.Visit(expr);
return(visitor.MemberName);
})
.ToArray();
return(To <TResult>(parameters, members));
}
public IQueryable <TResult> To <TResult>(System.Collections.Generic.IDictionary <string, object> parameters, params Expression <Func <TResult, object> >[] membersToExpand)
{
var members = membersToExpand.Select(expr =>
{
var visitor = new MemberVisitor();
visitor.Visit(expr);
return(visitor.MemberName);
})
.ToArray();
return(_source.Select(_mappingEngine.CreateMapExpression <TSource, TResult>(parameters, members)));
}
public IQueryable <TResult> To <TResult>(System.Collections.Generic.IDictionary <string, object> parameters, params Expression <Func <TResult, object> >[] membersToExpand)
{
var members = membersToExpand.Select(expr =>
{
var visitor = new MemberVisitor();
visitor.Visit(expr);
return(visitor.MemberName);
})
.ToArray();
var mapExpr = _mappingEngine.CreateMapExpression(_source.ElementType, typeof(TResult), parameters, members);
return(_source.Provider.CreateQuery <TResult>(
Expression.Call(
null,
QueryableSelectMethod.MakeGenericMethod(_source.ElementType, typeof(TResult)),
new[] { _source.Expression, Expression.Quote(mapExpr) }
)
));
}
public static MemberPaths GetMemberPaths <TResult>(Expression <Func <TResult, object> >[] membersToExpand) => membersToExpand.Select(expr => MemberVisitor.GetMemberPath(expr));