public StandaloneMetric(SerialMetric metric)
{
if (metric == null)
{
throw new ArgumentNullException("metric");
}
_metric = metric;
MetricAttribute attribute = _metric.GetType().GetCustomAttribute <MetricAttribute>();
_fieldNames = attribute.NameToFieldIndexMap
.OrderBy(kvp => kvp.Value)
.Select(kvp => kvp.Key)
.ToArray();
_singleOutput = _fieldNames.Length == 1;
_acceptBarInput = _metric is SingleOutputBarInputSerialMetric || _metric is MultipleOutputBarInputSerialMetric;
_sobiMetric = _metric as SingleOutputBarInputSerialMetric;
_soriMetric = _metric as SingleOutputRawInputSerialMetric;
_mobiMetric = _metric as MultipleOutputBarInputSerialMetric;
_moriMetric = _metric as MultipleOutputRawInputSerialMetric;
}
static MetricEvaluationContext()
{
Assembly assembly = Assembly.GetExecutingAssembly();
var metrics = assembly.GetTypes()
.Where(type => type.IsClass &&
typeof(SerialMetric).IsAssignableFrom(type));
foreach (var metric in metrics)
{
if (metric == typeof(SerialMetric) ||
metric == typeof(BarInputSerialMetric) ||
metric == typeof(RawInputSerialMetric) ||
metric == typeof(SingleOutputBarInputSerialMetric) ||
metric == typeof(MultipleOutputBarInputSerialMetric) ||
metric == typeof(SingleOutputRawInputSerialMetric) ||
metric == typeof(MultipleOutputRawInputSerialMetric))
{
continue;
}
if (!typeof(SingleOutputBarInputSerialMetric).IsAssignableFrom(metric) &&
!typeof(SingleOutputRawInputSerialMetric).IsAssignableFrom(metric) &&
!typeof(MultipleOutputBarInputSerialMetric).IsAssignableFrom(metric) &&
!typeof(MultipleOutputRawInputSerialMetric).IsAssignableFrom(metric))
{
throw new InvalidProgramException(
string.Format(
"Metric {0} is not inherited from class {1}, {2}, {3}, or {4}",
typeof(SingleOutputBarInputSerialMetric).Name,
typeof(SingleOutputRawInputSerialMetric).Name,
typeof(MultipleOutputBarInputSerialMetric).Name,
typeof(MultipleOutputRawInputSerialMetric).Name));
}
MetricAttribute attribute = metric.GetCustomAttribute <MetricAttribute>();
if (attribute == null)
{
throw new InvalidProgramException(
string.Format(
"Metric class {0} has not been associated with MetricAttribute",
metric.Name));
}
// validate if metric's attribute consistent with metric class
if (typeof(SingleOutputBarInputSerialMetric).IsAssignableFrom(metric) ||
typeof(SingleOutputRawInputSerialMetric).IsAssignableFrom(metric))
{
if (attribute.NameToFieldIndexMap.Count != 1)
{
throw new InvalidProgramException(
string.Format(
"Metric class {0} should have only single output, but its attribute declared {1} outputs",
metric.Name,
attribute.NameToFieldIndexMap.Count));
}
}
else if (typeof(MultipleOutputBarInputSerialMetric).IsAssignableFrom(metric) ||
typeof(MultipleOutputRawInputSerialMetric).IsAssignableFrom(metric))
{
if (attribute.NameToFieldIndexMap.Count <= 1)
{
throw new InvalidProgramException(
string.Format(
"Metric class {0} should have multiple output, but its attribute declared {1} output",
metric.Name,
attribute.NameToFieldIndexMap.Count));
}
}
else
{
// should never be here because above code has checked metric is inherited
// from the expected base classes
throw new InvalidProgramException("Run to unexpected code");
}
// validate metric names
foreach (var name in attribute.ShortNames)
{
if (NameToMetricAttributeMap.ContainsKey(name))
{
throw new InvalidProgramException(
string.Format(
"Short name {0} has been defined for class {1}",
name,
NameToMetricMap[name].Name));
}
NameToMetricAttributeMap.Add(name, attribute);
NameToMetricMap.Add(name, metric);
}
}
}
private MetricExpression Parse()
{
// parse the first part, such as MA[20]
StandaloneMetric metric = ParseMetric();
if (metric == null)
{
return(null);
}
// parse the call operation part, such as (MA[20])
MetricExpression callee = null;
Token token = PeekNextToken();
if (token != null && token.Type == TokenType.LeftParenthese)
{
GetNextToken();
callee = Parse();
if (callee == null || !Expect(TokenType.RightParenthese, out token))
{
return(null);
}
}
// parse the selection part, such as .DIF
int fieldIndex = -1;
token = PeekNextToken();
if (token != null && token.Type == TokenType.Dot)
{
GetNextToken();
if (!Expect(TokenType.Identifier, out token))
{
return(null);
}
string field = token.Value;
// verify if the selection name is part of metric definition
Type metricType = metric.Metric.GetType();
MetricAttribute attribute = metricType.GetCustomAttribute <MetricAttribute>();
if (!attribute.NameToFieldIndexMap.ContainsKey(field))
{
LastErrorMessage = string.Format("{0} is not a valid subfield of metric {1}", field, metricType.Name);
return(null);
}
fieldIndex = attribute.NameToFieldIndexMap[field];
}
MetricExpression retValue = metric;
if (callee != null)
{
retValue = new CallOperator(metric, callee);
}
if (fieldIndex >= 0)
{
retValue = new SelectionOperator(retValue, fieldIndex);
}
return(retValue);
}