//////////////////////////////////////////////////////////////////////////
// Building
//////////////////////////////////////////////////////////////////////////
// Add new column and return builder for column metadata.
// Columns cannot be added after adding the first row.
public HDictBuilder addCol(string name)
{
if (m_rows.Count > 0)
{
throw new InvalidOperationException("Cannot add cols after rows have been added");
}
if (!HDict.isTagName(name))
{
throw new ArgumentException("Invalid column name: " + name, "name");
}
BCol col = new BCol(name);
m_cols.Add(col);
return(col.Meta);
}
// Convert current state to an immutable HGrid instance
public HGrid toGrid()
{
// meta
HDict meta = Meta.toDict();
// cols
List <HCol> hcols = new List <HCol>(m_cols.Count);
for (int i = 0; i < m_cols.Count; ++i)
{
BCol bc = (BCol)m_cols[i];
hcols.Add(new HCol(i, bc.Name, bc.Meta.toDict()));
}
// let HGrid constructor do the rest...
return(new HGrid(meta, hcols, m_rows));
}
// 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());
}