protected virtual void EmitStringValue(NPathStringValue value)
{
Write("'");
Write(value.Value);
Write("'");
}
protected virtual void EmitExpression(IValue expression)
{
if (expression is NPathNotExpression)
{
NPathNotExpression value = (NPathNotExpression)expression;
EmitNot(value);
}
if (expression is NPathFunction)
{
NPathFunction value = (NPathFunction)expression;
EmitFunction(value);
}
if (expression is NPathParameter)
{
NPathParameter value = (NPathParameter)expression;
EmitParameter(value);
}
if (expression is NPathNullValue)
{
NPathNullValue value = (NPathNullValue)expression;
EmitNullValue(value);
}
if (expression is NPathBetweenExpression)
{
NPathBetweenExpression value = (NPathBetweenExpression)expression;
EmitBetween(value);
}
if (expression is NPathBooleanValue)
{
NPathBooleanValue value = (NPathBooleanValue)expression;
EmitBooleanValue(value);
}
if (expression is NPathDecimalValue)
{
NPathDecimalValue value = (NPathDecimalValue)expression;
EmitDecimalValue(value);
}
if (expression is NPathDateTimeValue)
{
NPathDateTimeValue value = (NPathDateTimeValue)expression;
EmitDateTimeValue(value);
}
if (expression is NPathGuidValue)
{
NPathGuidValue value = (NPathGuidValue)expression;
EmitGuidValue(value);
}
if (expression is NPathStringValue)
{
NPathStringValue value = (NPathStringValue)expression;
EmitStringValue(value);
}
if (expression is NPathIdentifier)
{
NPathIdentifier propertyPath = (NPathIdentifier)expression;
EmitPropertyPath(propertyPath);
}
if (expression is NPathPropertyFilter)
{
NPathPropertyFilter propertyFilter = (NPathPropertyFilter)expression;
EmitPropertyFilter(propertyFilter);
}
if (expression is NPathParenthesisGroup)
{
NPathParenthesisGroup parenthesisGroup = (NPathParenthesisGroup)expression;
EmitParenthesisGroup(parenthesisGroup);
}
if (expression is NPathMathExpression)
{
NPathMathExpression mathExpression = (NPathMathExpression)expression;
EmitMathExpression(mathExpression);
}
if (expression is NPathCompareExpression)
{
NPathCompareExpression compareExpression = (NPathCompareExpression)expression;
EmitCompareExpression(compareExpression);
}
if (expression is NPathBooleanExpression)
{
NPathBooleanExpression boolExpression = (NPathBooleanExpression)expression;
EmitBooleanExpression(boolExpression);
}
if (expression is NPathInExpression)
{
NPathInExpression value = (NPathInExpression)expression;
EmitIn(value);
}
if (expression is NPathSearchFunction)
{
NPathSearchFunction value = (NPathSearchFunction)expression;
EmitSearchFunction(value);
}
}
private IValue ParseValue()
{
IValue operand = null;
bool isNegative = false;
if (tokenizer.GetCurrentToken().IsType("sign"))
{
if (tokenizer.GetCurrentToken().IsType("minus"))
{
isNegative = true;
}
tokenizer.MoveNext();
}
Token currentToken = tokenizer.GetCurrentToken();
#region parse value
if (currentToken.IsType("null"))
{
NPathNullValue nullOperand = new NPathNullValue();
operand = nullOperand;
tokenizer.MoveNext();
}
else if (currentToken.IsType("parameter"))
{
NPathParameter parameterOperand = new NPathParameter();
parameterOperand.Value = parameterQueue[0];
parameterQueue.RemoveAt(0);
operand = parameterOperand;
tokenizer.MoveNext();
}
else if (tokenizer.GetCurrentToken().IsType("textsearch"))
{
return(ParseSearchFunctionExpression());
}
else if (currentToken.IsType("function") && IsInSelectClause() || currentToken.IsType("isnull") || currentToken.IsType("soundex"))
{
NPathFunction functionOperand = new NPathFunction();
if (currentToken.IsType("soundex"))
{
functionOperand = new NPathSoundexStatement();
}
if (currentToken.IsType("sum"))
{
functionOperand = new NPathSumStatement();
}
if (currentToken.IsType("isnull"))
{
functionOperand = new NPathIsNullStatement();
}
if (currentToken.IsType("count"))
{
functionOperand = new NPathCountStatement();
}
if (currentToken.IsType("avg"))
{
functionOperand = new NPathAvgStatement();
}
if (currentToken.IsType("min"))
{
functionOperand = new NPathMinStatement();
}
if (currentToken.IsType("max"))
{
functionOperand = new NPathMaxStatement();
}
tokenizer.MoveNext();
tokenizer.GetCurrentToken("(", "(");
tokenizer.MoveNext();
if (tokenizer.GetCurrentToken().IsType("distinct"))
{
functionOperand.Distinct = true;
tokenizer.MoveNext();
}
functionOperand.Expression = ParseBooleanExpression();
tokenizer.GetCurrentToken(")", ")");
tokenizer.MoveNext();
operand = functionOperand;
}
else if (currentToken.IsType("date"))
{
NPathDateTimeValue dateOperand = new NPathDateTimeValue();
dateOperand.Value = DateTime.Parse(currentToken.Text);
operand = dateOperand;
tokenizer.MoveNext();
}
else if (currentToken.IsType("decimal"))
{
NPathDecimalValue decimalOperand = new NPathDecimalValue();
decimalOperand.Value = double.Parse(currentToken.Text, NumberFormatInfo.InvariantInfo);
decimalOperand.IsNegative = isNegative;
operand = decimalOperand;
tokenizer.MoveNext();
}
else if (currentToken.IsType("string"))
{
NPathStringValue stringOperand = new NPathStringValue();
string text = currentToken.Text;
text = text.Substring(1, text.Length - 2);
if (currentToken.IsType("string '")) // do not localize
{
text = text.Replace("''", "'");
}
else if (currentToken.IsType("string \""))
{
text = text.Replace("\"\"", "\""); // do not localize
}
stringOperand.Value = text;
operand = stringOperand;
tokenizer.MoveNext();
}
else if (currentToken.IsType("boolean"))
{
NPathBooleanValue booleanOperand = new NPathBooleanValue();
booleanOperand.Value = bool.Parse(currentToken.Text);
operand = booleanOperand;
tokenizer.MoveNext();
}
else if (currentToken.IsType("guid"))
{
NPathGuidValue guidOperand = new NPathGuidValue();
guidOperand.Value = currentToken.Text;
operand = guidOperand;
tokenizer.MoveNext();
}
else if (currentToken.IsType("property path")) // do not localize
{
if (tokenizer.GetNextToken().IsType("("))
{
string fullPath = currentToken.Text;
string propertyPath = "";
string methodName = "";
int lastIndexOfDot = fullPath.LastIndexOf(".");
if (lastIndexOfDot > 0)
{
propertyPath = fullPath.Substring(0, lastIndexOfDot);
methodName = fullPath.Substring(lastIndexOfDot + 1);
}
else
{
methodName = fullPath;
}
NPathMethodCall call = new NPathMethodCall();
call.MethodName = methodName;
call.PropertyPath = new NPathIdentifier();
call.PropertyPath.Path = propertyPath;
call.PropertyPath.IsNegative = isNegative;
//TODO:add method support here
tokenizer.MoveNext(); //move past "("
tokenizer.MoveNext();
while (!tokenizer.GetCurrentToken().IsType(")"))
{
IValue param = ParseExpression();
call.Parameters.Add(param);
if (tokenizer.GetCurrentToken().IsType("comma"))
{
tokenizer.MoveNext();
}
else
{
tokenizer.GetCurrentToken(")", ")");
}
}
tokenizer.MoveNext();
operand = call;
}
else if (tokenizer.GetNextToken().IsType("["))
{
CurrentPropertyPrefix = currentToken.Text + ".";
NPathBracketGroup bracketGroup = new NPathBracketGroup();
tokenizer.MoveNext();
ParseBracketGroup(bracketGroup);
CurrentPropertyPrefix = "";
NPathParenthesisGroup parens = new NPathParenthesisGroup();
parens.Expression = bracketGroup.Expression;
operand = parens;
}
else
{
NPathIdentifier propertyOperand = new NPathIdentifier();
propertyOperand.Path = CurrentPropertyPrefix + currentToken.Text;
propertyOperand.ReferenceLocation = IsInSelectClause() ? NPathPropertyPathReferenceLocation.SelectClause : NPathPropertyPathReferenceLocation.WhereClause;
//CurrentQuery.AddPropertyPathReference(propertyOperand.Path) ;
propertyOperand.IsNegative = isNegative;
operand = propertyOperand;
tokenizer.MoveNext();
}
}
else if (currentToken.IsType("("))
{
NPathParenthesisGroup parenthesisOperand = new NPathParenthesisGroup();
ParseParenthesisGroup(parenthesisOperand);
parenthesisOperand.IsNegative = isNegative;
operand = parenthesisOperand;
}
else
{
//unknown value?
throw GetUnknownTokenException();
}
#endregion
return(operand);
}
