private static PredyLambdaExpression SerializeLambda(LambdaExpression exp, Type type = null)
{
PredyLambdaExpression predyLambda = new PredyLambdaExpression
{
Body = SerializeInternal(exp.Body),
Parameters = exp.Parameters.Select(SerializeParameter).ToList(),
Type = type
};
return(predyLambda);
}
public static void WriteLambda(JsonWriter writer, PredyLambdaExpression value, JsonSerializer serializer)
{
JObject jObject = new JObject
{
["ExType"] = JToken.FromObject(PredyExpressions.Lambda),
[nameof(PredyLambdaExpression.Body)] = JToken.FromObject(value.Body, serializer),
[nameof(PredyLambdaExpression.Parameters)] = JToken.FromObject(value.Parameters, serializer),
[nameof(PredyLambdaExpression.Type)] = JToken.FromObject(value.Type, serializer)
};
jObject.WriteTo(writer);
}
private static void Main(string[] args)
{
IEnumerable <Person> persons = new List <Person>
{
new Person {
Name = "Emre", Lastname = "Hizli", Age = 29
},
new Person {
Name = "Tony", Lastname = "Stark", Age = 40
},
new Person {
Name = "Karen", Lastname = "Hizli", Age = 1
}
};
Expression <Func <Person, bool> > predicate = m => m.Age > 10 && m.Name.StartsWith("Em");
PredyLambdaExpression serialized = predicate.Serialize(); // Serialize with predy
string json = JsonConvert.SerializeObject(serialized); // Convert to json
PredyLambdaExpression deserializedJson = JsonConvert.DeserializeObject <PredyLambdaExpression>(json); // Deserialize to predy
Expression <Func <Person, bool> > deserialized = (Expression <Func <Person, bool> >)deserializedJson.Deserialize(); // Deserialize to lambda with predy
List <Person> result = persons.Where(deserialized.Compile()).ToList(); // Compile and use
}
private static LambdaExpression DeserializeLambda(PredyLambdaExpression lambdaPredy)
{
Expression body = DeserializeInternal(lambdaPredy.Body);
return(Expression.Lambda(body, _visitor.GetParameters(lambdaPredy.Parameters)));
}
public static LambdaExpression Deserialize(PredyLambdaExpression predy)
{
_visitor = new PredyParameterVisitor();
return(DeserializeLambda(predy));
}
public static LambdaExpression Deserialize(this PredyLambdaExpression predy)
{
return(PredyConverter.Deserialize(predy));
}
