// Convenience to build an error grid from exception
// Replace Tabs with 2 spaces
// Filter out /r/n
// YET TO DO - Test this - Adding is a bit strange
// project-haystack:
/*
* Error Grid
* If a operation failed after a request grid is successfully read by a server,
* then the server returns an error grid. An error grid is indicated by the presence of the err marker tag in the grid metadata.
* All error grids must also include a dis tag in the grid metadata with a human readable descripton of the problem.
* If the server runtime supports stack traces, this should be reported as a multi-line string via the errTrace tag in the grid metadata.
*
* Example of an error grid encoded as Zinc:
* ver:"3.0" err dis:"Cannot resolve id: badId" errTrace:"UnknownRecErr: badId\n ...."
* empty
*/
public static HGrid errToGrid(Exception e)
{
// Java sucks - replaed with .NET
StringBuilder sout = new StringBuilder();
string trace = e.StackTrace.ToString();
for (int i = 0; i < trace.Length; ++i)
{
int ch = trace[i];
if (ch == '\t')
{
sout.Append(" ");
}
else if (ch != '\r')
{
sout.Append((char)ch);
}
}
HGridBuilder b = new HGridBuilder();
b.Meta.add("err")
.add("dis", e.Message)
.add("errTrace", sout.ToString());
b.addCol("empty");
return(b.toGrid());
}
// Convenience to build grid from array of HHisItem
public static HGrid hisItemsToGrid(HDict meta, HHisItem[] items)
{
HGridBuilder b = new HGridBuilder();
b.Meta.add(meta);
b.addCol("ts");
b.addCol("val");
for (int i = 0; i < items.Length; ++i)
{
b.addRow(new HVal[] { items[i].TimeStamp, items[i].hsVal });
}
return(b.toGrid());
}
//////////////////////////////////////////////////////////////////////////
// Utils
//////////////////////////////////////////////////////////////////////////
// Convenience to build one row grid from HDict.
public static HGrid dictToGrid(HDict dict)
{
HGridBuilder b = new HGridBuilder();
int iIndex = 0;
List <HVal> cells = new List <HVal>();
for (iIndex = 0; iIndex < dict.size(); iIndex++)
{
string strKey = dict.getKeyAt(iIndex, false);
if (strKey != null)
{
HVal val = dict.get(strKey);
b.addCol(strKey);
cells.Add(val);
}
}
b.addRow(cells.ToArray());
return(b.toGrid());
}
// Convenience to build grid from array of HDict.
// Any null entry will be row of all null cells.
public static HGrid dictsToGrid(HDict meta, HDict[] dicts)
{
HCol colEmpty = new HCol(0, "empty", HDict.Empty);
// If empty return an empty cols collection and no values Grid
if (dicts.Length == 0)
{
List <List <HVal> > rowListEmpty = new List <List <HVal> >();
List <HCol> rowEmpty = new List <HCol>();
rowEmpty.Add(colEmpty);
return(new HGrid(meta, rowEmpty, rowListEmpty));
}
HGridBuilder b = new HGridBuilder();
b.Meta.add(meta);
// collect column names - why does this need to be a dictionary (hashmap in the java code)?
// it only stores the col name twice.
Dictionary <string, string> colsByName = new Dictionary <string, string>();
for (int i = 0; i < dicts.Length; ++i)
{
HDict dict = dicts[i];
if (dict != null)
{
for (int it = 0; it < dict.size(); it++)
{
string name = dict.getKeyAt(it, false);
if (name != null)
{
if (!colsByName.Keys.Contains(name))
{
colsByName.Add(name, name);
b.addCol(name);
}
}
}
}
}
// if all dicts were null, handle special case
// by creating a dummy column
if (colsByName.Count == 0)
{
colsByName.Add("empty", "empty");
b.addCol("empty");
}
// now map rows
int numCols = b.colCount;
for (int ri = 0; ri < dicts.Length; ++ri)
{
HDict dict = dicts[ri];
HVal[] cells = new HVal[numCols];
for (int ci = 0; ci < numCols; ++ci)
{
if (dict == null)
{
cells[ci] = null;
}
else
{
BCol colatci = b.GetColAt(ci);
if (colatci != null)
{
cells[ci] = dict.get(colatci.Name, false);
}
}
}
b.addRow(cells);
}
return(b.toGrid());
}
