IoTSharp.RuleEngine is a https://github.com/gsoulavy/RuleEngine fork, I'm will implement a rule engine for IoTSharp based on https://github.com/gsoulavy/RuleEngine, so, thanks to Gab Soulavy for the great work.
This simple rule engine is a .NET Standard library 2.0, which uses Microsoft's DLR DynamicExpressionParser in the background. The goal was to make a simple engine which is easy to use and compatible with many projects.
下面的示例实现了 在输入的数据中通过规则链MsgT_Exit_Waste 中的 STATION_NAME 不为空并且不以“某某某收费站”开头的数据输出， 这是个简单的例子 只有 Then , 没有Else
Rule rule = new Rule()
{
RuleName = "data",
ErrorType = ErrorType.Error,
ErrorMessage = "未能找到数据",
Expression = "f.MsgT_Exit_Waste!=null",
ThenSelect = "MsgT_Exit_Waste",
Then = new Rule()
{
Expression = "f.STATION_NAME!=null && !f.STATION_NAME.StartsWith(\"某某收费站\")",
ThenSelect = "STATION_NAME",
ErrorMessage = "收费站配置信息错误",
RuleName = "moumou",
RuleExpressionType = RuleExpressionType.LambdaExpression
}
};
var engine = new RulesEngine(rule);
var result = engine.Execute(Properties.Resources.MsgT_Exit_Waste);
Assert.True(result.Result);
Assert.Equal("新疆米东北主线站", result.Output);
The IKernel interface is implemented with Kerner in order to support Inverson Of Control.
IKernel ruleEngine = new Kernel();The engine is designed to use any object as a rule which implements IRule interface in order to make it easy to use with an ORM.
public interface IRule
{
string Key { get; set; }
string Expression { get; set; }
}//...
void AddRule(IRule rule);
//...String expressions can be simply against the object passed to the engine.
Creating a fact:
var fact = new Person {Age = 37, Income = 45000, NumberOfChildren = 3};Validating the fact:
var result = ruleEngine.Validate(fact, "(f.Age > 3 && f.Income > 100000) || f.NumberOfChildren > 5");
// result = falseMore than one expreession can be added to the engine
var rules = new List<Rule>
{
new Rule {Key = "1", Expression = "(f.Age > 3 && f.Income < 50000) || f.NumberOfChildren > 2"},
new Rule {Key = "2", Expression = "(f.Age > 3 && f.Income > 100000) || f.NumberOfChildren > 5"}
};
ruleEngine.AddRules(rules);
// Validate against all rules when no key passed
var result = ruleEngine.ValidateAll(f);
// result = false
// Only validate against rules with the matching key
var result = ruleEngine.ValidateAll(f, "1");
// result = trueThe calls are the same as the case of validate all, however it returns true if any case is true.
var rules = new List<Rule>
{
new Rule {Key = "1", Expression = "(f.Age > 3 && f.Income < 50000) || f.NumberOfChildren > 2"},
new Rule {Key = "2", Expression = "(f.Age > 3 && f.Income > 100000) || f.NumberOfChildren > 5"}
};
ruleEngine.AddRules(rules);
// Validate against all rules when no key passed
var result = ruleEngine.ValidateAny(f);
// result = true
// Only validate against rules with the matching key
var result = ruleEngine.ValidateAny(f, "1");
// result = true