/// <summary>
/// Takes the calcDef and extracts the first expression using the operator of the creator. This is called repeated until there are no more expressions of the operator.
/// </summary>
/// <param name="calcToolDef"></param>
/// <param name="calcDef_upperCase"></param>
/// <returns></returns>
public MathOperationDefinition CreateMathOperation(CalculationToolDefinition calcToolDef, ref string calcDef, ref string calcDef_upperCase)
{
List <DataValueDefinition> valueObjects = new List <DataValueDefinition>(); // NOTE: this List will be owned by the MathOperationDefinition that we create
List <string> operatorsUsed = new List <string>(); // NOTE: this List will be owned by the MathOperationDefinition that we create
int index;
int indexOfFirstOperator = -1;
int indexAfterFirstOperator = -1;
// find first matching operator
for (index = 0; index < calcDef_upperCase.Length && indexOfFirstOperator < 0; index++)
{
for (int opNdx = 0; opNdx < numOperators; opNdx++)
{
if (calcDef_upperCase[index] == supportedOperators[opNdx][0] ||
(supportedOperators[opNdx][0] == ' ' && Char.IsWhiteSpace(calcDef_upperCase[index])))
{
bool didNotFindConflict = true;
for (int y = 1; y < supportedOperators[opNdx].Length; y++)
{
if (index + y >= calcDef_upperCase.Length || // if we run out of calcDef, we have a conflict (non-match)
calcDef_upperCase[index + y] != supportedOperators[opNdx][y])
{
if (index + y < calcDef_upperCase.Length &&
supportedOperators[opNdx][y] == ' ' && Char.IsWhiteSpace(calcDef_upperCase[index + y]))
{
// special case where they don't have to match exactly
}
else
{
didNotFindConflict = false;
break;
}
}
}
if (didNotFindConflict)
{
indexOfFirstOperator = index;
indexAfterFirstOperator = index + supportedOperators[opNdx].Length;
operatorsUsed.Add(supportedOperators[opNdx]);
break;
}
}
}
}
if (indexOfFirstOperator < 0)
{
return(null); //operator not found...we must have extracted all instances in previous calls to this method
}
// grab value before operator
index = indexOfFirstOperator - 1;
while (index >= 0 && Char.IsWhiteSpace(calcDef_upperCase[index]))
{
index--;
}
int indexOfValueBeforeFirstOperator = -1;
int indexAfterValueBeforeFirstOperatorIdentifier = index + 1;
bool foundNonDigits = false;
bool foundSomething = false;
while (index >= 0)
{
if (Char.IsLetter(calcDef_upperCase[index]))
{
foundSomething = true;
foundNonDigits = true;
index--;
}
else if (Char.IsDigit(calcDef_upperCase[index]))
{
foundSomething = true;
index--;
}
else if (calcDef_upperCase[index] == '_')
{
foundSomething = true;
foundNonDigits = true;
index--;
}
else if (calcDef_upperCase[index] == '#' && foundSomething && !foundNonDigits && (
(index == 0) || (index > 0 && Char.IsWhiteSpace(calcDef_upperCase[index - 1]))
)
)
{
index--;
}
else
{
break;
}
}
if (!foundSomething)
{
throw new ArgumentException("Error parsing calculation. code=43987598");
}
indexOfValueBeforeFirstOperator = index + 1;
string theValueIdentifier = calcDef.Substring(indexOfValueBeforeFirstOperator, indexAfterValueBeforeFirstOperatorIdentifier - indexOfValueBeforeFirstOperator);
if (foundNonDigits)
{
if (!Char.IsLetter(theValueIdentifier[0]))
{
throw new ArgumentException("Error parsing calculation: value identifier doesn't start with a letter: '" + theValueIdentifier + "'");
}
}
if (!foundNonDigits && theValueIdentifier[0] == '#')
{
valueObjects.Add(calcToolDef.GetValueForAlias(theValueIdentifier));
}
else
{
valueObjects.Add(calcToolDef.TestSequence().DataValueRegistry.GetObject(theValueIdentifier));
}
// grab value after operator
index = indexAfterFirstOperator;
valueObjects.Add(GrabNextValue(calcToolDef, ref calcDef, ref index));
// while next token is a matching operator, grab next value and check next token
string theOperator;
do
{
theOperator = GrabOperator(ref calcDef_upperCase, ref index);
if (theOperator.Length > 0)
{
operatorsUsed.Add(theOperator);
valueObjects.Add(GrabNextValue(calcToolDef, ref calcDef, ref index));
}
} while (theOperator != String.Empty);
// remove substring for parsing and replace it with alias
int lengthOfSubString = index < calcDef_upperCase.Length ? index - indexOfValueBeforeFirstOperator : calcDef_upperCase.Length - indexOfValueBeforeFirstOperator;
string subExpression = calcDef.Substring(indexOfValueBeforeFirstOperator, lengthOfSubString).Trim();
string calcDefBeforeAlias = "";
string calcDefBeforeAlias_upper = "";
if (indexOfValueBeforeFirstOperator > 0)
{
calcDefBeforeAlias = calcDef.Substring(0, indexOfValueBeforeFirstOperator).Trim();
calcDefBeforeAlias_upper = calcDef_upperCase.Substring(0, indexOfValueBeforeFirstOperator).Trim();
if (calcDefBeforeAlias.Length > 0)
{
calcDefBeforeAlias += ' ';
calcDefBeforeAlias_upper += ' ';
}
}
string calcDefAfterAlias = "";
string calcDefAfterAlias_upper = "";
if (index < calcDef_upperCase.Length)
{
calcDefAfterAlias = calcDef.Substring(index).Trim();
calcDefAfterAlias_upper = calcDef_upperCase.Substring(index).Trim();
if (calcDefAfterAlias.Length > 0)
{
calcDefAfterAlias = ' ' + calcDefAfterAlias;
calcDefAfterAlias_upper = ' ' + calcDefAfterAlias_upper;
}
}
if (calcDefBeforeAlias.Length > 0 || calcDefAfterAlias.Length > 0)
{
string alias = "#" + (calcToolDef.aliasCount++);
CalculationAlias aliasGuts = new CalculationAlias();
aliasGuts.expressionToLookupValue = subExpression;
aliasGuts.expressionForExpansion = "(" + subExpression + ")";
calcToolDef.aliasMap.Add(alias, aliasGuts);
calcDef = calcDefBeforeAlias + alias + calcDefAfterAlias;
calcDef_upperCase = calcDefBeforeAlias_upper + alias + calcDefAfterAlias_upper;
if (calcDef.Length != calcDef_upperCase.Length)
{
throw new ArgumentException("Error parsing calculation. code=293084");
}
}
else
{
// nothing left to parse
calcDef = "";
calcDef_upperCase = "";
}
// return calculation object
string expandedCalcDef = calcToolDef.ExpandCalcDef(subExpression);
return(CreateMathOperation(calcToolDef.TestSequence(), expandedCalcDef, valueObjects, operatorsUsed));
}
protected DataValueDefinition GrabNextValue(CalculationToolDefinition calcToolDef, ref string calcDef, ref int index)
{
while (index < calcDef.Length && Char.IsWhiteSpace(calcDef[index]))
{
index++;
}
int indexOfValue = index;
int indexAfterValue = -1;
bool foundNonDigits = false;
bool foundSomething = false;
bool foundDecimal = false;
while (index < calcDef.Length)
{
if (Char.IsLetter(calcDef[index]))
{
foundSomething = true;
foundNonDigits = true;
index++;
}
else if (Char.IsDigit(calcDef[index]))
{
foundSomething = true;
index++;
}
else if (!foundNonDigits && !foundDecimal && calcDef[index] == '.')
{
foundSomething = true;
foundDecimal = true;
index++;
}
else if (calcDef[index] == '_')
{
foundSomething = true;
foundNonDigits = true;
index++;
}
else if (calcDef[index] == '#' && !foundSomething && index + 1 < calcDef.Length && Char.IsDigit(calcDef[index + 1]))
{
// start of an alias
foundSomething = true;
index++;
}
else
{
break;
}
}
if (!foundSomething)
{
throw new ArgumentException("Error parsing calculation. code=433447598");
}
indexAfterValue = index;
string theValueIdentifier = calcDef.Substring(indexOfValue, indexAfterValue - indexOfValue);
if (foundNonDigits)
{
if (!Char.IsLetter(calcDef[indexOfValue]))
{
throw new ArgumentException("Error parsing calculation: value identifier doesn't start with a letter: '" + theValueIdentifier + "'");
}
}
if (!foundNonDigits && theValueIdentifier[0] == '#')
{
return(calcToolDef.GetValueForAlias(theValueIdentifier));
}
else
{
return(calcToolDef.TestSequence().DataValueRegistry.GetObject(theValueIdentifier));
}
}