public int DeleteWidgets(Filter filter)
{
return 0;
}
private List<Filter> FormFilterList(DataFilter dataFilter)
{
List<Filter> filterList = new List<Filter>();
try
{
foreach (org.iringtools.library.Expression expression in dataFilter.Expressions)
{
Filter filter = new Filter();
string propertyName = expression.PropertyName;
DataProperty dataProperty = (from dp in _dataObjectDefinition.dataProperties
where dp.propertyName.ToUpper() == propertyName.ToUpper()
select dp).FirstOrDefault();
bool isString = (dataProperty.dataType == DataType.String || dataProperty.dataType == DataType.Char);
filter.AttributeName = propertyName;
if (expression.RelationalOperator == RelationalOperator.StartsWith)
{
if (!isString) throw new Exception("StartsWith operator used with non-string property");
filter.RelationalOperator = "like";
filter.Value = "\"" + expression.Values.FirstOrDefault() + "\"";
}
else if (expression.RelationalOperator == RelationalOperator.EndsWith)
{
if (!isString) throw new Exception("EndsWith operator used with non-string property");
filter.RelationalOperator = "like";
filter.Value = "\"" + expression.Values.FirstOrDefault() + "\"";
}
else if (expression.RelationalOperator == RelationalOperator.Contains)
{
if (!isString) throw new Exception("Contains operator used with non-string property");
filter.RelationalOperator = "like";
filter.Value = "\"" + expression.Values.FirstOrDefault() + "\"";
}
else if (expression.RelationalOperator == RelationalOperator.In)
{
filter.RelationalOperator = expression.RelationalOperator.ToString();
string values = String.Empty;
int valueIndex = 1;
int valueCount = expression.Values.Count();
foreach (string value in expression.Values)
{
if (isString)
{
if (valueIndex == valueCount)
values += "\"" + value + "\"";
else
values += "\"" + value + "\", ";
}
else
{
if (valueIndex == valueCount)
values += value;
else
values += value + ", ";
}
valueIndex++;
}
filter.Value = values;
}
else
{
filter.RelationalOperator = expression.RelationalOperator.ToString();
if (isString)
filter.Value = "\"" + expression.Values.FirstOrDefault() + "\"";
else
filter.Value = expression.Values.FirstOrDefault();
}
if (expression.LogicalOperator != LogicalOperator.None)
filter.Logical = expression.LogicalOperator.ToString();
filterList.Add(filter);
}
}
catch (Exception ex)
{
_logger.ErrorFormat("Error while marshalling a data filter into a filter list: {1}", ex);
throw new Exception("Error while marshalling a data filter into a filter list.", ex);
}
return filterList;
}
public Widgets SearchWidgets(string query)
{
List<Filter> filters = new List<Filter>();
Filter name = new Filter
{
AttributeName = "Name",
RelationalOperator = "like",
Value = query,
};
filters.Add(name);
Filter description = new Filter
{
Logical = "or",
AttributeName = "Description",
RelationalOperator = "like",
Value = query,
};
filters.Add(description);
Filter material = new Filter
{
Logical = "or",
AttributeName = "Material",
RelationalOperator = "like",
Value = query,
};
filters.Add(material);
// for database applications ,the following function has to be called to build filters.
// Currently it is difficult to implement search functionality on Enum types
//filters = BuildSearchFiltersForResources("Widgets", query);
return ReadWidgets(filters);
}
