private void WriteResultToAnswerTable(int worldNo, DataTable content, double probability)
{
DataTable answerTable = new DataTable();
answerTable.Columns.Add(new DataColumn("worldNo", typeof(int)));
var attCols = content.Columns;
var colNames = new List <string>();
foreach (DataColumn col in attCols)
{
answerTable.Columns.Add(col.ColumnName, typeof(string));
colNames.Add(col.ColumnName);
}
answerTable.Columns.Add(new DataColumn("p", typeof(double)));
var distinctRows = content.DefaultView.ToTable(true, colNames.ToArray());
foreach (DataRow row in distinctRows.Rows)
{
var newRow = answerTable.NewRow();
newRow.SetField("worldNo", worldNo);
newRow.SetField("p", probability);
foreach (DataColumn column in content.Columns)
{
var columnName = column.ColumnName;
newRow.SetField(columnName, row.Field <string>(columnName));
}
answerTable.Rows.Add(newRow);
}
if (underlineDatabase.CheckIsTableAlreadyExist(answerTableName))
{
underlineDatabase.WriteTableBacktoDatabase(answerTableName, answerTable);
}
else
{
underlineDatabase.CreateNewTableWithDataTable(answerTableName, answerTable);
}
}
/// <summary>
/// Find out all states that a new random variable i can has
/// for each i's state, duplicate the existing possibleWorld table
/// and insert this state as a row in every world
/// </summary>
/// <param name="query"></param>
/// <param name="randomVariable"></param>
private void PopulatePossibleWorlds(SqlInsertQuery query, int randomVariable)
{
var tableName = query.TableName;
var statesTable = underlineDatabase.ExecuteSqlWithResult("select * from " + tableName + "_PossibleStates");
IEnumerable <DataRow> newlyAddedPossibleStates = from newRow in statesTable.AsEnumerable()
where newRow.Field <int>("var") == randomVariable
select newRow;
var newVarStates = newlyAddedPossibleStates.Count();
var existingWorldsTable = underlineDatabase.ExecuteSqlWithResult("select * from " + tableName + "_PossibleWorlds");
var result = existingWorldsTable.Copy();
// replicate existingWorldTable, number of copy depends on number of state in new variable.
var worldNumbers = (from dataRow in existingWorldsTable.AsEnumerable()
select dataRow.Field <int>("worldNo")).Distinct().ToList();
// if old worlds is empty, for each new state create a world
if (!worldNumbers.Any())
{
int index = 0;
foreach (var eachPossibleState in newlyAddedPossibleStates)
{
index++;
insertVariableState(index, eachPossibleState, ref result);
}
}
else
{
for (int i = 1; i <= newVarStates; i++)
{
var eachNewState = newlyAddedPossibleStates.ElementAt(i - 1);
// for each new variable state, duplicate existing worlds
var duplicatedWorldNumbers = generateNewRandomVariables(worldNumbers, i, existingWorldsTable, ref result);
// current new state i is assign to each world
foreach (var worldNumber in duplicatedWorldNumbers)
{
insertVariableState(worldNumber, eachNewState, ref result);
}
}
}
underlineDatabase.WriteTableBacktoDatabase(tableName + "_PossibleWorlds", result);
}