public override void SetData(object data)
{
var queryString = data as string;
if (string.IsNullOrEmpty(queryString))
return;
if (queryString.StartsWith("<"))
{
try
{
var xs = new XmlSerializer(typeof (Query));
var sr = new StringReader(queryString);
var xr = new XmlTextReader(sr);
_query = xs.Deserialize(xr) as Query;
xr.Close();
}
catch
{
//TODO: handle wrong query here (modified by hand somewhere else)
}
ShowNodeQueryPanel();
}
else
{
if (LuceneTextBox != null)
LuceneTextBox.Text = queryString;
}
}
private List<ExpressionInfo> GetExpressionInfoListFromQuery(Query query)
{
var expInfoList = new List<ExpressionInfo>();
var index = 0;
if (query == null)
return expInfoList;
var gr1 = query.Root as Group;
var single = query.Root as Predicate;
if (single != null)
{
expInfoList.Add(GetExpressionInfo(single));
return expInfoList;
}
if (gr1 == null)
return expInfoList;
foreach (var exp in gr1.Items)
{
var pred = exp as Predicate;
var gr = exp as Group;
if (pred != null)
{
var expInfo = GetExpressionInfo(pred);
expInfo.Id = index++;
expInfoList.Add(expInfo);
continue;
}
if (gr == null)
continue;
var count = 0;
foreach (var item in gr.Items)
{
var pred2 = item as Predicate;
if (pred2 == null)
continue;
count++;
var expInfo = GetExpressionInfo(pred2);
expInfo.Id = index++;
expInfo.LogicalOperator = gr1.LogicalOperator == LogicalOperator.Or && count == 1
? LogicalOperator.Or
: LogicalOperator.None;
expInfoList.Add(expInfo);
}
}
return expInfoList;
}
//========================================================================= FieldControl functions
public override object GetData()
{
ResetListData();
if (LuceneTextBox != null && !string.IsNullOrEmpty(LuceneTextBox.Text))
return LuceneTextBox.Text;
if (this.ExpInfoList.Count == 0 || (this.ExpInfoList.Count == 1 && this.ExpInfoList[0].IsEmpty))
return string.Empty;
_query = new Query();
//EXPLIST: a and b or c and d or e
//QUERY : (a & b) | (c & d) | (d & e)
try
{
ShiftOperatorsDown();
if (this.ExpInfoList.Count == 1)
{
_query.Root = GetExpressionItem(this.ExpInfoList[0]);
_query.Root.LogicalOperator = LogicalOperator.None;
}
else
{
var co = ContainsOr(this.ExpInfoList);
var root = new Group { LogicalOperator = (co ? LogicalOperator.Or : LogicalOperator.None) };
var current = co ? new Group { LogicalOperator = LogicalOperator.And } : root;
foreach (var expInfo in this.ExpInfoList)
{
switch (expInfo.LogicalOperator)
{
case LogicalOperator.And:
break;
case LogicalOperator.Or:
//add current and open new block
if (current.Items.Count > 1)
root.Items.Add(current);
else
root.Items.Add(current.Items[0]);
current = new Group { LogicalOperator = LogicalOperator.And };
break;
}
current.Items.Add(GetExpressionItem(expInfo));
}
//the last block
if (root != current)
{
if (current.Items.Count > 1)
root.Items.Add(current);
else
root.Items.Add(current.Items[0]);
}
_query.Root = root;
}
}
catch(Exception ex)
{
throw new FieldControlDataException(this, "InvalidQuery", ex.Message);
}
var xs = new XmlSerializer(typeof(Query));
var sw = new StringWriter();
var xw = new XmlTextWriter(sw);
xs.Serialize(xw, _query);
var result = sw.ToString();
xw.Close();
var nodeQueryXml = Query.GetNodeQueryXml(result);
//this is for validation
NodeQuery.Parse(nodeQueryXml);
return result;
}
