/// <summary>
/// parse the expression
/// </summary>
/// <param name = "taskRef">a reference to the owner task</param>
protected internal void fillData(Task taskRef)
{
XmlParser parser = ClientManager.Instance.RuntimeCtx.Parser;
List <String> tokensVector;
int endContext = parser.getXMLdata().IndexOf(XMLConstants.TAG_TERM, parser.getCurrIndex());
if (_task == null)
{
_task = taskRef;
}
if (endContext != -1 && endContext < parser.getXMLdata().Length)
{
//last position of its tag
String tag = parser.getXMLsubstring(endContext);
parser.add2CurrIndex(tag.IndexOf(ConstInterface.MG_TAG_EXP) + ConstInterface.MG_TAG_EXP.Length);
tokensVector = XmlParser.getTokens(parser.getXMLsubstring(endContext), XMLConstants.XML_ATTR_DELIM);
initElements(tokensVector);
parser.setCurrIndex(endContext + XMLConstants.TAG_TERM.Length); //to delete "/>" too
}
else
{
Logger.Instance.WriteExceptionToLog("in Command.FillData() out of string bounds");
}
}
private int _numerator; //generator for actCount
/// <summary>
/// Constructor
/// </summary>
internal ActionManager(Task parent)
{
_parentTask = parent;
_numerator = 0;
_actState = new bool[InternalInterface.MG_ACT_TOT_CNT];
_actCount = new int[InternalInterface.MG_ACT_TOT_CNT];
}
/// <summary>
///
/// </summary>
/// <param name="resType"></param>
/// <returns></returns>
internal ExpressionEvaluator.ExpVal evaluate(StorageAttribute resType)
{
ExpressionEvaluator.ExpVal expVal = null;
String retVal;
bool isNull = false;
if (computedByClient())
{
expVal = ExpressionEvaluator.eval(_expBytes, resType, _task);
}
else
{
RunTimeEvent rtEvt = ClientManager.Instance.EventsManager.getLastRtEvent();
Task mprgCreator = null;
if (rtEvt != null)
{
mprgCreator = rtEvt.getMainPrgCreator();
}
// create a new command object only when necessary
if (resType != _prevResType)
{
_cmdToServer = CommandFactory.CreateEvaluateCommand(_task.getTaskTag(), resType, _id, 0, mprgCreator);
}
ClientManager.Instance.execRequestWithSubformRecordCycle(_cmdsToServer, _cmdToServer, this, _task);
if (resType != StorageAttribute.BLOB && resType != StorageAttribute.BLOB_VECTOR)
{
retVal = _resultValue;
}
else if (_resultValue != null && _resultValue.Equals(" "))
{
retVal = "";
}
else
{
retVal = RecordUtils.byteStreamToString(_resultValue);
}
if (retVal == null)
{
isNull = true;
}
// If we don't know what result type we got, and want to keep it, as in ExpCalc
if (resType == StorageAttribute.NONE)
{
resType = _type;
}
expVal = new ExpressionEvaluator.ExpVal(resType, isNull, retVal);
}
_prevResType = resType;
return(expVal);
}
/// <summary>
/// set the value of the Yes/No/Expression
/// </summary>
/// <param name = "task">the task to look for expression</param>
/// <param name = "strVal">the string that contains the Yes/No/Expression</param>
internal void setVal(Task task, String strVal)
{
switch (strVal[0])
{
case 'Y':
_val = true;
break;
case 'N':
_val = false;
break;
default:
int expId = XmlParser.getInt(strVal);
if (task != null)
{
_exp = task.getExpById(expId);
}
break;
}
}
/// <summary>
/// evaluate the expression and return the result
/// </summary>
/// <param name = "resType">is the expected type </param>
/// <param name = "length">of expected Alpha string </param>
/// <returns> evaluated value or null if value evaluated to null (by ExpressionEvaluator) </returns>
internal String evaluate(StorageAttribute resType, int length)
{
ExpressionEvaluator.ExpVal expVal = null;
String retVal = null;
if (computedByClient())
{
expVal = ExpressionEvaluator.eval(_expBytes, resType, _task);
ConvertExpValForDotNet(expVal);
if (expVal.IsNull)
{
// even if actual dotnet obj is null, we need to return blobPrefix
if (expVal.Attr == StorageAttribute.DOTNET)
{
retVal = expVal.ToMgVal();
}
else
{
retVal = null;
}
}
else if (resType == StorageAttribute.BLOB_VECTOR && expVal.Attr == StorageAttribute.BLOB)
{
if (VectorType.validateBlobContents(expVal.StrVal))
{
retVal = expVal.ToMgVal();
}
else
{
retVal = null;
}
}
else if (expVal.Attr == StorageAttribute.BLOB_VECTOR &&
resType != StorageAttribute.BLOB_VECTOR && resType != StorageAttribute.BLOB)
{
retVal = null;
}
else
{
retVal = expVal.ToMgVal();
}
}
else
{
RunTimeEvent rtEvt = ClientManager.Instance.EventsManager.getLastRtEvent();
Task mprgCreator = null;
if (rtEvt != null)
{
mprgCreator = rtEvt.getMainPrgCreator();
}
// create a new command object only when necessary
if (resType != _prevResType)
{
_cmdToServer = CommandFactory.CreateEvaluateCommand(_task.getTaskTag(), resType, _id, length, mprgCreator);
}
ClientManager.Instance.execRequestWithSubformRecordCycle(_cmdsToServer, _cmdToServer, this, _task);
if (resType != StorageAttribute.BLOB && resType != StorageAttribute.BLOB_VECTOR)
{
retVal = _resultValue;
}
else if (_resultValue != null && _resultValue.Equals(" "))
{
retVal = "";
}
else
{
retVal = RecordUtils.byteStreamToString(_resultValue);
}
}
_prevResType = resType;
return(retVal);
}
