public void CheckAndWrite(String variableName, int agentInstanceId, Object newValue)
{
var metaData = _variables.Get(variableName);
var variableNumber = metaData.VariableNumber;
if (newValue == null)
{
Write(variableNumber, agentInstanceId, null);
return;
}
var valueType = newValue.GetType();
if (metaData.EventType != null)
{
if ((!TypeHelper.IsSubclassOrImplementsInterface(newValue.GetType(), metaData.EventType.UnderlyingType)))
{
throw new VariableValueException("Variable '" + variableName
+ "' of declared event type '" + metaData.EventType.Name + "' underlying type '" + metaData.EventType.UnderlyingType.FullName +
"' cannot be assigned a value of type '" + valueType.FullName + "'");
}
var eventBean = _eventAdapterService.AdapterForType(newValue, metaData.EventType);
Write(variableNumber, agentInstanceId, eventBean);
return;
}
var variableType = metaData.VariableType;
if ((valueType == variableType) || (variableType == typeof(object)))
{
Write(variableNumber, agentInstanceId, newValue);
return;
}
// Look for simple boxing rules
var valueTypeBoxed = valueType.GetBoxedType();
var variableTypeBoxed = variableType.GetBoxedType();
if (((valueType != valueTypeBoxed) || (variableType != variableTypeBoxed)) && ((valueTypeBoxed == variableTypeBoxed)))
{
Write(variableNumber, agentInstanceId, newValue);
return;
}
if ((!variableType.IsNumeric()) || (!valueType.IsNumeric()))
{
throw new VariableValueException(VariableServiceUtil.GetAssigmentExMessage(variableName, variableType, valueType));
}
// determine if the expression type can be assigned
if (!(TypeHelper.CanCoerce(valueType, variableType)))
{
throw new VariableValueException(VariableServiceUtil.GetAssigmentExMessage(variableName, variableType, valueType));
}
object valueCoerced = CoercerFactory.CoerceBoxed(newValue, variableType);
Write(variableNumber, agentInstanceId, valueCoerced);
}
/// <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);
}
}