public VariableReader(VariableMetaData variableMetaData, VariableVersionThreadLocal versionThreadLocal, VersionedValueList <Object> versionsLow)
{
_variableMetaData = variableMetaData;
_versionThreadLocal = versionThreadLocal;
_versionsLow = versionsLow;
_versionsHigh = null;
}
public static string CheckVariableContextName(
ContextDescriptor contextDescriptor,
VariableMetaData variableMetaData)
{
if (contextDescriptor == null)
{
return(CheckVariableContextName((string)null, variableMetaData));
}
return(CheckVariableContextName(contextDescriptor.ContextName, variableMetaData));
}
public static string CheckVariableContextName(
string optionalStatementContextName,
VariableMetaData variableMetaData)
{
if (optionalStatementContextName == null)
{
if (variableMetaData.ContextPartitionName != null)
{
return("Variable '" + variableMetaData.VariableName + "' defined for use with context '" +
variableMetaData.ContextPartitionName + "' can only be accessed within that context");
}
}
else
{
if (variableMetaData.ContextPartitionName != null &&
!variableMetaData.ContextPartitionName.Equals(optionalStatementContextName))
{
return("Variable '" + variableMetaData.VariableName + "' defined for use with context '" +
variableMetaData.ContextPartitionName + "' is not available for use with context '" +
optionalStatementContextName + "'");
}
}
return(null);
}
/// <summary>
/// Ctor.
/// </summary>
/// <param name="assignments">the list of variable assignments</param>
/// <param name="variableService">variable service</param>
/// <param name="eventAdapterService">event adapters</param>
/// <throws><seealso cref="ExprValidationException" /> when variables cannot be found</throws>
public VariableReadWritePackage(IList <OnTriggerSetAssignment> assignments, VariableService variableService, EventAdapterService eventAdapterService)
{
_metaData = new VariableMetaData[assignments.Count];
_readersForGlobalVars = new VariableReader[assignments.Count];
_mustCoerce = new bool[assignments.Count];
_writers = new WriteDesc[assignments.Count];
_variableTypes = new Dictionary <String, Object>();
_eventAdapterService = eventAdapterService;
_variableService = variableService;
IDictionary <EventTypeSPI, CopyMethodDesc> eventTypeWrittenProps = new Dictionary <EventTypeSPI, CopyMethodDesc>();
var count = 0;
IList <VariableTriggerSetDesc> assignmentList = new List <VariableTriggerSetDesc>();
foreach (var expressionWithAssignments in assignments)
{
var possibleVariableAssignment = ExprNodeUtility.CheckGetAssignmentToVariableOrProp(expressionWithAssignments.Expression);
if (possibleVariableAssignment == null)
{
throw new ExprValidationException("Missing variable assignment expression in assignment number " + count);
}
assignmentList.Add(new VariableTriggerSetDesc(possibleVariableAssignment.First, possibleVariableAssignment.Second.ExprEvaluator));
var fullVariableName = possibleVariableAssignment.First;
var variableName = fullVariableName;
String subPropertyName = null;
var indexOfDot = variableName.IndexOf('.');
if (indexOfDot != -1)
{
subPropertyName = variableName.Substring(indexOfDot + 1);
variableName = variableName.Substring(0, indexOfDot);
}
VariableMetaData variableMetadata = variableService.GetVariableMetaData(variableName);
_metaData[count] = variableMetadata;
if (variableMetadata == null)
{
throw new ExprValidationException("Variable by name '" + variableName + "' has not been created or configured");
}
if (variableMetadata.IsConstant)
{
throw new ExprValidationException("Variable by name '" + variableName + "' is declared constant and may not be set");
}
if (variableMetadata.ContextPartitionName == null)
{
_readersForGlobalVars[count] = variableService.GetReader(variableName, EPStatementStartMethodConst.DEFAULT_AGENT_INSTANCE_ID);
}
if (subPropertyName != null)
{
if (variableMetadata.EventType == null)
{
throw new ExprValidationException("Variable by name '" + variableName + "' does not have a property named '" + subPropertyName + "'");
}
var type = variableMetadata.EventType;
if (!(type is EventTypeSPI))
{
throw new ExprValidationException("Variable by name '" + variableName + "' event type '" + type.Name + "' not writable");
}
var spi = (EventTypeSPI)type;
var writer = spi.GetWriter(subPropertyName);
var getter = spi.GetGetter(subPropertyName);
if (writer == null)
{
throw new ExprValidationException("Variable by name '" + variableName + "' the property '" + subPropertyName + "' is not writable");
}
_variableTypes.Put(fullVariableName, spi.GetPropertyType(subPropertyName));
var writtenProps = eventTypeWrittenProps.Get(spi);
if (writtenProps == null)
{
writtenProps = new CopyMethodDesc(variableName, new List <String>());
eventTypeWrittenProps.Put(spi, writtenProps);
}
writtenProps.PropertiesCopied.Add(subPropertyName);
_writers[count] = new WriteDesc(spi, variableName, writer, getter);
}
else
{
// determine types
var expressionType = possibleVariableAssignment.Second.ExprEvaluator.ReturnType;
if (variableMetadata.EventType != null)
{
if ((expressionType != null) && (!TypeHelper.IsSubclassOrImplementsInterface(expressionType, variableMetadata.EventType.UnderlyingType)))
{
throw new VariableValueException("Variable '" + variableName
+ "' of declared event type '" + variableMetadata.EventType.Name + "' underlying type '" + variableMetadata.EventType.UnderlyingType.FullName +
"' cannot be assigned a value of type '" + expressionType.FullName + "'");
}
_variableTypes.Put(variableName, variableMetadata.EventType.UnderlyingType);
}
else
{
var variableType = variableMetadata.VariableType;
_variableTypes.Put(variableName, variableType);
// determine if the expression type can be assigned
if (variableType != typeof(object))
{
if ((TypeHelper.GetBoxedType(expressionType) != variableType) &&
(expressionType != null))
{
if ((!TypeHelper.IsNumeric(variableType)) ||
(!TypeHelper.IsNumeric(expressionType)))
{
throw new ExprValidationException(VariableServiceUtil.GetAssigmentExMessage(variableName, variableType, expressionType));
}
if (!(TypeHelper.CanCoerce(expressionType, variableType)))
{
throw new ExprValidationException(VariableServiceUtil.GetAssigmentExMessage(variableName, variableType, expressionType));
}
_mustCoerce[count] = true;
}
}
}
}
count++;
}
_assignments = assignmentList.ToArray();
if (eventTypeWrittenProps.IsEmpty())
{
_copyMethods = new Dictionary <EventTypeSPI, EventBeanCopyMethod>();
return;
}
_copyMethods = new Dictionary <EventTypeSPI, EventBeanCopyMethod>();
foreach (var entry in eventTypeWrittenProps)
{
var propsWritten = entry.Value.PropertiesCopied;
var props = propsWritten.ToArray();
var copyMethod = entry.Key.GetCopyMethod(props);
if (copyMethod == null)
{
throw new ExprValidationException("Variable '" + entry.Value.VariableName
+ "' of declared type " + entry.Key.UnderlyingType.GetTypeNameFullyQualPretty() +
"' cannot be assigned to");
}
_copyMethods.Put(entry.Key, copyMethod);
}
}
private void CreateNewVariable(String variableName, String optionalContextName, Type type, EventType eventType, bool constant, Object value)
{
lock (this)
{
// check type
var variableType = type.GetBoxedType();
// check if it exists
var metaData = _variables.Get(variableName);
if (metaData != null)
{
throw new VariableExistsException(VariableServiceUtil.GetAlreadyDeclaredEx(variableName, false));
}
// find empty spot
var emptySpot = -1;
var count = 0;
foreach (var entry in _variableVersionsPerCP)
{
if (entry == null)
{
emptySpot = count;
break;
}
count++;
}
int variableNumber;
if (emptySpot != -1)
{
variableNumber = emptySpot;
_variableVersionsPerCP[emptySpot] = new ConcurrentDictionary <int, VariableReader>();
_changeCallbacksPerCP[emptySpot] = null;
}
else
{
variableNumber = _currentVariableNumber;
_variableVersionsPerCP.Add(new ConcurrentDictionary <int, VariableReader>());
_changeCallbacksPerCP.Add(null);
_currentVariableNumber++;
}
// check coercion
var coercedValue = value;
if (eventType != null)
{
if ((value != null) && (!TypeHelper.IsSubclassOrImplementsInterface(value.GetType(), eventType.UnderlyingType)))
{
throw new VariableTypeException("Variable '" + variableName
+ "' of declared event type '" + eventType.Name + "' underlying type '" + eventType.UnderlyingType.FullName +
"' cannot be assigned a value of type '" + value.GetType().FullName + "'");
}
coercedValue = _eventAdapterService.AdapterForType(value, eventType);
}
else if (variableType == typeof(object))
{
// no validation
}
else
{
// allow string assignments to non-string variables
if ((coercedValue != null) && (coercedValue is String))
{
try {
coercedValue = TypeHelper.Parse(variableType, (String)coercedValue);
}
catch (Exception ex)
{
throw new VariableTypeException(
string.Format(
"Variable '{0}' of declared type {1} cannot be initialized by value '{2}': {3}: {4}",
variableName,
variableType.GetTypeNameFullyQualPretty(),
coercedValue,
ex.GetType().FullName,
ex.Message));
}
}
if ((coercedValue != null) && (variableType.GetBoxedType() != coercedValue.GetBoxedType()))
{
// if the declared type is not numeric or the init value is not numeric, fail
if ((!variableType.IsNumeric()) || (!(coercedValue.IsNumber())))
{
throw GetVariableTypeException(variableName, variableType, coercedValue.GetType());
}
if (!(coercedValue.GetType().CanCoerce(variableType)))
{
throw GetVariableTypeException(variableName, variableType, coercedValue.GetType());
}
// coerce
coercedValue = CoercerFactory.CoerceBoxed(coercedValue, variableType);
}
}
var initialState = coercedValue;
VariableStateFactory stateFactory = new VariableStateFactoryConst(initialState);
metaData = new VariableMetaData(variableName, optionalContextName, variableNumber, variableType, eventType, constant, stateFactory);
_variables.Put(variableName, metaData);
}
}
public static EventType GetEventType(int statementId, EventAdapterService eventAdapterService, VariableMetaData variableMetaData)
{
var variableTypes = new Dictionary <String, Object>();
variableTypes.Put(variableMetaData.VariableName, variableMetaData.VariableType);
String outputEventTypeName = statementId + "_outcreatevar";
return(eventAdapterService.CreateAnonymousMapType(outputEventTypeName, variableTypes, true));
}