public static TValue Eval <TSource, TValue>(this TSource source, Expression <Func <TSource, TValue> > value)
{
var parameters = new Dictionary <string, object> {
{ value.Parameters.First().Name, source }
};
var evaluator = new SafeExpressionEvaluator(value.Body, parameters);
var result = evaluator.Evaluate();
if (result == null)
{
return(default(TValue));
}
return((TValue)result);
}
public static IPropertyDefinition Property <TProperty>(this IMicroModel model, Expression <Func <TProperty> > propertyGetter)
{
propertyGetter = Evaluator.EvaluateClosures(propertyGetter);
var member = propertyGetter.GetOutermostMember();
var propertyInfo = (PropertyInfo)member.Member;
var property = BuildProperty(model, propertyInfo.Name, typeof(TProperty));
var readEvaluator = new SafeExpressionEvaluator(propertyGetter.Body, new Dictionary <string, object>());
property.Getter = (x) => readEvaluator.Evaluate();
AddDependencies(property, propertyGetter);
if (propertyInfo.CanWrite)
{
var writeEvaluator = new SafeExpressionEvaluator(member.Expression, new Dictionary <string, object>());
property.Setter = (x, y) =>
{
var target = writeEvaluator.Evaluate();
propertyInfo.SetValue(target, y, null);
};
}
return(property);
}
