public override void Attach(
EventType parentEventType,
int streamNumber,
ViewForgeEnv viewForgeEnv)
{
var windowName = ViewName;
var validated = ViewForgeSupport.Validate(
windowName,
parentEventType,
viewParameters,
true,
viewForgeEnv,
streamNumber);
if (viewParameters.Count < 2 || viewParameters.Count > 3) {
throw new ViewParameterException(ViewParamMessage);
}
// validate first parameter: timestamp expression
if (!validated[0].Forge.EvaluationType.IsNumeric()) {
throw new ViewParameterException(ViewParamMessage);
}
timestampExpression = validated[0];
ViewForgeSupport.AssertReturnsNonConstant(windowName, validated[0], 0);
timePeriodComputeForge = ViewFactoryTimePeriodHelper.ValidateAndEvaluateTimeDeltaFactory(
ViewName,
viewParameters[1],
ViewParamMessage,
1,
viewForgeEnv,
streamNumber);
// validate optional parameters
if (validated.Length == 3) {
var constant = ViewForgeSupport.ValidateAndEvaluate(
windowName,
validated[2],
viewForgeEnv,
streamNumber);
if (!constant.IsNumber() || constant.IsFloatingPointNumber()) {
throw new ViewParameterException(
"Externally-timed batch view requires a Long-typed reference point in msec as a third parameter");
}
optionalReferencePoint = constant.AsInt64();
}
eventType = parentEventType;
}
