public static Expression <Func <T, bool> > CreateQuery <T>(this SyntaxTree syntaxTree, IGridifyMapper <T>?mapper = null)
{
mapper = mapper.FixMapper(syntaxTree);
var exp = ExpressionToQueryConvertor.GenerateQuery(syntaxTree.Root, mapper).Expression;
if (exp == null)
{
throw new GridifyQueryException("Invalid SyntaxTree.");
}
return(exp);
}
public static IQueryable <T> ApplyFiltering <T>(this IQueryable <T> query, string?filter, IGridifyMapper <T>?mapper = null)
{
if (string.IsNullOrWhiteSpace(filter))
{
return(query);
}
var syntaxTree = SyntaxTree.Parse(filter !, GridifyGlobalConfiguration.CustomOperators.Operators);
if (syntaxTree.Diagnostics.Any())
{
throw new GridifyFilteringException(syntaxTree.Diagnostics.Last());
}
mapper = mapper.FixMapper(syntaxTree);
var(queryExpression, _) = ExpressionToQueryConvertor.GenerateQuery(syntaxTree.Root, mapper);
query = query.Where(queryExpression);
return(query);
}
public static Expression <Func <T, bool> > GetFilteringExpression <T>(this IGridifyFiltering gridifyFiltering, IGridifyMapper <T>?mapper = null)
{
if (string.IsNullOrWhiteSpace(gridifyFiltering.Filter))
{
throw new GridifyQueryException("Filter is not defined");
}
var syntaxTree = SyntaxTree.Parse(gridifyFiltering.Filter !, GridifyGlobalConfiguration.CustomOperators.Operators);
if (syntaxTree.Diagnostics.Any())
{
throw new GridifyFilteringException(syntaxTree.Diagnostics.Last() !);
}
mapper = mapper.FixMapper(syntaxTree);
var(queryExpression, _) = ExpressionToQueryConvertor.GenerateQuery(syntaxTree.Root, mapper);
if (queryExpression == null)
{
throw new GridifyQueryException("Can not create expression with current data");
}
return(queryExpression);
}
