private string CreateFunction(
StringExpressionFunction function, string value)
{
StringBuilder filter = new StringBuilder();
_paramseters.Add(value);
filter.Append(_filterData.ValuePropertyBindingPath);
if (_filterData.ValuePropertyType.IsGenericType &&
_filterData.ValuePropertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
filter.Append(".Value");
}
_paramCounter.Increment();
_paramCounter.Increment();
filter.AppendFormat(".ToString().{0}(@{1}, @{2})", function, (_paramCounter.ParameterNumber - 1), (_paramCounter.ParameterNumber));
if (function == StringExpressionFunction.IndexOf)
{
filter.Append(" != -1 ");
}
_paramseters.Add(_filterData.IsCaseSensitiveSearch
? StringComparison.CurrentCulture : StringComparison.CurrentCultureIgnoreCase);
return(filter.ToString());
}
private string createFunction(
StringExpressionFunction function, string value)
{
StringBuilder filter = new StringBuilder();
paramseters.Add(value);
filter.Append(filterData.ValuePropertyBindingPath);
if (filterData.ValuePropertyType.IsGenericType
&& filterData.ValuePropertyType.GetGenericTypeDefinition() == typeof(Nullable<>))
{
filter.Append(".Value");
}
paramCounter.Increment();
paramCounter.Increment();
filter.Append(".ToString()." + function.ToString() + "(@" + (paramCounter.ParameterNumber - 1) + ", @" + (paramCounter.ParameterNumber) + ")");
if (function == StringExpressionFunction.IndexOf)
{
filter.Append(" != -1 ");
}
paramseters.Add(filterData.IsCaseSensitiveSearch
? StringComparison.CurrentCulture : StringComparison.CurrentCultureIgnoreCase);
return filter.ToString();
}
private List <string> Parse(string filterString)
{
if (_filterData.Type == FilterType.TextContains)
{
filterString = string.Format("{0}{1}{0}", WildcardAnyString, filterString);
}
string token = null;
int i = 0;
bool expressionCompleted = false;
List <string> filter = new List <string>();
string expressionValue = String.Empty;
StringExpressionFunction function = StringExpressionFunction.Undefined;
do
{
token = i < filterString.Length ? filterString[i].ToString() : null;
if (token == WildcardAnyString || token == null)
{
if (expressionValue.StartsWith(WildcardAnyString) && token != null)
{
function = StringExpressionFunction.IndexOf;
expressionCompleted = true;
}
else if (expressionValue.StartsWith(WildcardAnyString) && token == null)
{
function = StringExpressionFunction.EndsWith;
expressionCompleted = false;
}
else
{
function = StringExpressionFunction.StartsWith;
if (filterString.Length - 1 > i)
{
expressionCompleted = true;
}
}
}
if (token == null)
{
expressionCompleted = true;
}
expressionValue += token;
if (expressionCompleted &&
function != StringExpressionFunction.Undefined &&
expressionValue != String.Empty)
{
string expressionValueCopy = String.Copy(expressionValue);
expressionValueCopy = expressionValueCopy.Replace(WildcardAnyString, String.Empty);
if (expressionValueCopy != String.Empty)
{
filter.Add(CreateFunction(function, expressionValueCopy));
}
function = StringExpressionFunction.Undefined;
expressionValue = expressionValue.EndsWith(WildcardAnyString) ? WildcardAnyString : String.Empty;
expressionCompleted = false;
}
i++;
} while (token != null);
return(filter);
}
private List <string> parse(string filterString)
{
string token = null;
int i = 0;
bool expressionCompleted = false;
List <string> filter = new List <string>();
string expressionValue = String.Empty;
StringExpressionFunction function = StringExpressionFunction.Undefined;
do
{
token = i < filterString.Length ? filterString[i].ToString() : null;
if (token == WildcardAnyString || token == null)
{
if (expressionValue.StartsWith(WildcardAnyString) && token != null)
{
function = StringExpressionFunction.IndexOf;
expressionCompleted = true;
}
else if (expressionValue.StartsWith(WildcardAnyString) && token == null)
{
function = StringExpressionFunction.EndsWith;
expressionCompleted = false;
}
else
{
function = StringExpressionFunction.StartsWith;
if (filterString.Length - 1 > i)
{
expressionCompleted = true;
}
}
}
if (token == null)
{
expressionCompleted = true;
}
expressionValue += token;
if (expressionCompleted &&
function != StringExpressionFunction.Undefined &&
!string.IsNullOrEmpty(expressionValue))
{
string expressionValueCopy = String.Copy(expressionValue);
expressionValueCopy = expressionValueCopy.Replace(WildcardAnyString, String.Empty);
if (!string.IsNullOrEmpty(expressionValueCopy))
{
filter.Add(createFunction(function, expressionValueCopy));
}
function = StringExpressionFunction.Undefined;
expressionValue = expressionValue.EndsWith(WildcardAnyString) ? WildcardAnyString : String.Empty;
expressionCompleted = false;
}
i++;
} while (token != null);
return(filter);
}
