Guidelines.RestApi.Collections.Filtering

Implementation of the Filtering API of Microsoft Guidelines REST API using Superpower.

Supported comparison operators

• Equal

var expression = "Id eq 1";

• NotEqual

var expression = "Id ne 1";

• GraterThan

var expression = "Id gt 1";

• GraterThanOrEqual

var expression = "Id ge 1";

• LessThan

var expression = "Id lt 1";

• LessThanOrEqual

var expression = "Id le 1";

• In

var expression = "Id in (1,2,3)";

Supported string functions

• Length

var expression = "length(Title) gt 1";

• StartsWith

var expression = "startswith(Title, 'Some')";

• EndsWith

var expression = "endswith(Title, 'Title')";

• Contains

var expression = "contains(Title, 'Title')";

• IndexOf

var expression = "indexof(Title, 'Title') eq 0";

Supported logical operators

• And

var expression = "Id eq 1 and Value ne 5.0";

• Or

var expression = "Id eq 1 or Value ne 5.0";

• Not

var expression = "not Id eq 1";

Usage

var expression = "(length(Title) gt 5 and contains(Title, 'tle')) or Id in (3,5)";
// Parse a filtering function
Expression<Func<Item, bool>> predicateExpression = FilterParser.Parse<Item>(expression);
// Compile a filtering function
Func<Item, bool> predicate = FilterCompiler.Compile<Item>(expression);