private AggSvcGroupByReclaimAgedEvalFuncFactory GetEvaluationFunction(VariableService variableService, String hintValue, String optionalContextName)
{
VariableMetaData variableMetaData = variableService.GetVariableMetaData(hintValue);
if (variableMetaData != null)
{
if (!variableMetaData.VariableType.IsNumeric())
{
throw new ExprValidationException("Variable type of variable '" + variableMetaData.VariableName + "' is not numeric");
}
String message = VariableServiceUtil.CheckVariableContextName(optionalContextName, variableMetaData);
if (message != null)
{
throw new ExprValidationException(message);
}
return(new ProxyAggSvcGroupByReclaimAgedEvalFuncFactory
{
ProcMake = agentInstanceContext =>
{
VariableReader reader = variableService.GetReader(
variableMetaData.VariableName, agentInstanceContext.AgentInstanceId);
return new AggSvcGroupByReclaimAgedEvalFuncVariable(reader);
}
});
}
else
{
double valueDouble;
try {
valueDouble = DoubleValue.ParseString(hintValue);
}
catch (Exception) {
throw new ExprValidationException("Failed to parse hint parameter value '" + hintValue + "' as a double-typed seconds value or variable name");
}
if (valueDouble <= 0)
{
throw new ExprValidationException("Hint parameter value '" + hintValue + "' is an invalid value, expecting a double-typed seconds value or variable name");
}
return(new ProxyAggSvcGroupByReclaimAgedEvalFuncFactory
{
ProcMake = agentInstanceContext => new AggSvcGroupByReclaimAgedEvalFuncConstant(valueDouble)
});
}
}
public static ExprNode ResolvePropertyOrVariableIdentifier(String identifier, VariableService variableService, StatementSpecRaw spec)
{
var metaData = variableService.GetVariableMetaData(identifier);
if (metaData != null)
{
var exprNode = new ExprVariableNodeImpl(metaData, null);
spec.HasVariables = true;
AddVariableReference(spec, metaData.VariableName);
var message = VariableServiceUtil.CheckVariableContextName(spec.OptionalContextName, metaData);
if (message != null)
{
throw ASTWalkException.From(message);
}
return(exprNode);
}
else
{
return(new ExprIdentNodeImpl(identifier));
}
}
/// <summary>
/// Ctor.
/// </summary>
/// <param name="rowLimitSpec">specification for row limit, or null if no row limit is defined</param>
/// <param name="variableService">for retrieving variable state for use with row limiting</param>
/// <param name="optionalContextName">Name of the optional context.</param>
/// <exception cref="ExprValidationException">
/// Limit clause variable by name '" + rowLimitSpec.NumRowsVariable + "' has not been declared
/// or
/// or
/// Limit clause requires a variable of numeric type
/// or
/// Limit clause variable by name '" + rowLimitSpec.OptionalOffsetVariable + "' has not been declared
/// or
/// or
/// Limit clause requires a variable of numeric type
/// or
/// Limit clause requires a positive offset
/// </exception>
/// <throws>com.espertech.esper.epl.expression.core.ExprValidationException if row limit specification validation fails</throws>
public RowLimitProcessorFactory(RowLimitSpec rowLimitSpec, VariableService variableService, string optionalContextName)
{
if (rowLimitSpec.NumRowsVariable != null)
{
_numRowsVariableMetaData = variableService.GetVariableMetaData(rowLimitSpec.NumRowsVariable);
if (_numRowsVariableMetaData == null)
{
throw new ExprValidationException("Limit clause variable by name '" + rowLimitSpec.NumRowsVariable + "' has not been declared");
}
string message = VariableServiceUtil.CheckVariableContextName(optionalContextName, _numRowsVariableMetaData);
if (message != null)
{
throw new ExprValidationException(message);
}
if (!TypeHelper.IsNumeric(_numRowsVariableMetaData.VariableType))
{
throw new ExprValidationException("Limit clause requires a variable of numeric type");
}
}
else
{
_numRowsVariableMetaData = null;
_currentRowLimit = rowLimitSpec.NumRows.GetValueOrDefault();
if (_currentRowLimit < 0)
{
_currentRowLimit = int.MaxValue;
}
}
if (rowLimitSpec.OptionalOffsetVariable != null)
{
_offsetVariableMetaData = variableService.GetVariableMetaData(rowLimitSpec.OptionalOffsetVariable);
if (_offsetVariableMetaData == null)
{
throw new ExprValidationException("Limit clause variable by name '" + rowLimitSpec.OptionalOffsetVariable + "' has not been declared");
}
string message = VariableServiceUtil.CheckVariableContextName(optionalContextName, _offsetVariableMetaData);
if (message != null)
{
throw new ExprValidationException(message);
}
if (!TypeHelper.IsNumeric(_offsetVariableMetaData.VariableType))
{
throw new ExprValidationException("Limit clause requires a variable of numeric type");
}
}
else
{
_offsetVariableMetaData = null;
if (rowLimitSpec.OptionalOffset != null)
{
_currentOffset = rowLimitSpec.OptionalOffset.GetValueOrDefault();
if (_currentOffset <= 0)
{
throw new ExprValidationException("Limit clause requires a positive offset");
}
}
else
{
_currentOffset = 0;
}
}
}
public static OutputConditionFactory CreateCondition(
OutputLimitSpec outputLimitSpec,
StatementContext statementContext,
bool isGrouped,
bool isWithHavingClause,
bool isStartConditionOnCreation,
ResultSetProcessorHelperFactory resultSetProcessorHelperFactory)
{
if (outputLimitSpec == null)
{
return new OutputConditionNullFactory();
}
// Check if a variable is present
VariableMetaData variableMetaData = null;
if (outputLimitSpec.VariableName != null)
{
variableMetaData = statementContext.VariableService.GetVariableMetaData(outputLimitSpec.VariableName);
if (variableMetaData == null)
{
throw new ExprValidationException(
"Variable named '" + outputLimitSpec.VariableName + "' has not been declared");
}
string message = VariableServiceUtil.CheckVariableContextName(
statementContext.ContextDescriptor, variableMetaData);
if (message != null)
{
throw new ExprValidationException(message);
}
}
if (outputLimitSpec.DisplayLimit == OutputLimitLimitType.FIRST && isGrouped)
{
return new OutputConditionNullFactory();
}
if (outputLimitSpec.RateType == OutputLimitRateType.CRONTAB)
{
return resultSetProcessorHelperFactory.MakeOutputConditionCrontab(
outputLimitSpec.CrontabAtSchedule, statementContext, isStartConditionOnCreation);
}
else if (outputLimitSpec.RateType == OutputLimitRateType.WHEN_EXPRESSION)
{
return resultSetProcessorHelperFactory.MakeOutputConditionExpression(
outputLimitSpec.WhenExpressionNode, outputLimitSpec.ThenExpressions, statementContext,
outputLimitSpec.AndAfterTerminateExpr, outputLimitSpec.AndAfterTerminateThenExpressions,
isStartConditionOnCreation);
}
else if (outputLimitSpec.RateType == OutputLimitRateType.EVENTS)
{
if (Log.IsDebugEnabled)
{
Log.Debug(".createCondition creating OutputConditionCount with event rate " + outputLimitSpec);
}
if ((variableMetaData != null) && (!variableMetaData.VariableType.IsNumericNonFP()))
{
throw new ArgumentException(
"Variable named '" + outputLimitSpec.VariableName + "' must be type integer, long or short");
}
int rate = -1;
if (outputLimitSpec.Rate != null)
{
rate = outputLimitSpec.Rate.AsInt();
}
return resultSetProcessorHelperFactory.MakeOutputConditionCount(
rate, variableMetaData, statementContext);
}
else if (outputLimitSpec.RateType == OutputLimitRateType.TERM)
{
if (outputLimitSpec.AndAfterTerminateExpr == null &&
(outputLimitSpec.AndAfterTerminateThenExpressions == null ||
outputLimitSpec.AndAfterTerminateThenExpressions.IsEmpty()))
{
return new OutputConditionTermFactory();
}
else
{
return resultSetProcessorHelperFactory.MakeOutputConditionExpression(
new ExprConstantNodeImpl(false), Collections.GetEmptyList<OnTriggerSetAssignment>(),
statementContext, outputLimitSpec.AndAfterTerminateExpr,
outputLimitSpec.AndAfterTerminateThenExpressions, isStartConditionOnCreation);
}
}
else
{
if (Log.IsDebugEnabled)
{
Log.Debug(
".createCondition creating OutputConditionTime with interval length " + outputLimitSpec.Rate);
}
if ((variableMetaData != null) && (!variableMetaData.VariableType.IsNumeric()))
{
throw new ArgumentException(
"Variable named '" + outputLimitSpec.VariableName + "' must be of numeric type");
}
return resultSetProcessorHelperFactory.MakeOutputConditionTime(
outputLimitSpec.TimePeriodExpr, isStartConditionOnCreation);
}
}