protected override FilterExpressionCosting Transform(FilterSubpropertyExpression spx)
{
var receiver = Transform(spx.Receiver);
return(new FilterExpressionCosting(
new FilterSubpropertyExpression(spx.PropertyName, receiver.Expression),
receiver.Costing + 0.1));
}
protected override FilterExpression Transform(FilterSubpropertyExpression spx)
{
if (spx == _source)
{
return(_dest);
}
return(base.Transform(spx));
}
protected override Expression <CompiledFilterExpression> Transform(FilterSubpropertyExpression spx)
{
var tgv = typeof(LinqExpressionCompiler).GetTypeInfo().GetMethod(nameof(TryGetStructurePropertyValue), BindingFlags.Static | BindingFlags.Public);
var norm = typeof(Representation).GetTypeInfo().GetMethod(nameof(Representation.Represent), BindingFlags.Static | BindingFlags.Public);
var recv = Transform(spx.Receiver);
var context = Expression.Parameter(typeof(LogEvent));
var r = Expression.Variable(typeof(object));
var str = Expression.Variable(typeof(StructureValue));
var result = Expression.Variable(typeof(LogEventPropertyValue));
var sx3 = Expression.Call(tgv, str, Expression.Constant(spx.PropertyName, typeof(string)), result);
var sx1 = Expression.Condition(sx3,
Expression.Call(norm, result),
Expression.Constant(Undefined.Value, typeof(object)));
var sx2 = Expression.Block(typeof(object),
Expression.Assign(str, Expression.TypeAs(r, typeof(StructureValue))),
Expression.Condition(Expression.Equal(str, Expression.Constant(null, typeof(StructureValue))),
Expression.Constant(Undefined.Value, typeof(object)),
sx1));
var assignR = Expression.Assign(r, Splice(recv, context));
var getValue = Expression.Condition(Expression.TypeIs(r, typeof(Undefined)),
Expression.Constant(Undefined.Value, typeof(object)),
sx2);
return(Expression.Lambda <CompiledFilterExpression>(
Expression.Block(typeof(object), new[] { r, str, result }, assignR, getValue),
context));
//return context =>
//{
// var r = recv(context);
// if (r is Undefined)
// return Undefined.Value;
// var str = r as StructureValue;
// if (str == null)
// return Undefined.Value;
// LogEventPropertyValue result;
// if (!str.Properties.TryGetValue(spx.PropertyName, out result))
// return Undefined.Value;
// return Represent(result);
//};
}
protected override FilterExpression Transform(FilterSubpropertyExpression spx)
{
return(new FilterSubpropertyExpression(spx.PropertyName, Transform(spx.Receiver)));
}
protected override FilterCallExpression Transform(FilterSubpropertyExpression spx)
{
return(Transform(spx.Receiver));
}
protected abstract TResult Transform(FilterSubpropertyExpression spx);
