public IEnumerable <T> ExecuteDeferredQuery <T>(TableMapping map)
{
if (_conn.Trace)
{
Debug.WriteLine("Executing Query: " + this);
}
var stmt = Prepare();
try {
var cols = new TableMapping.Column[SQLite3.ColumnCount(stmt)];
for (int i = 0; i < cols.Length; i++)
{
var name = SQLite3.ColumnName16(stmt, i);
cols[i] = map.FindColumn(name);
}
while (SQLite3.Step(stmt) == SQLite3.Result.Row)
{
var obj = Activator.CreateInstance(map.MappedType);
for (int i = 0; i < cols.Length; i++)
{
if (cols[i] == null)
{
continue;
}
var colType = SQLite3.ColumnType(stmt, i);
var val = ReadCol(stmt, i, colType, cols[i].ColumnType);
cols[i].SetValue(obj, val);
}
OnInstanceCreated(obj);
yield return((T)obj);
}
} finally {
SQLite3.Finalize(stmt);
}
}
public object Find(object pk, TableMapping map)
{
return(Query(map, map.GetByPrimaryKeySql, pk).FirstOrDefault());
}
public IEnumerable <object> DeferredQuery(TableMapping map, string query, params object[] args)
{
SQLiteCommand sQLiteCommand = CreateCommand(query, args);
return(sQLiteCommand.ExecuteDeferredQuery <object>(map));
}
public List <object> Query(TableMapping map, string query, params object[] args)
{
SQLiteCommand sQLiteCommand = CreateCommand(query, args);
return(sQLiteCommand.ExecuteQuery <object>(map));
}
public IEnumerable <T> ExecuteQuery <T>(TableMapping map, object[] source)
{
CheckDisposed();
Log(nameof(ExecuteQuery), source);
OnExecutionStarted();
var sw = Stopwatch.StartNew();
try
{
var r = Result.OK;
if (!Prepared)
{
Statement = Prepare();
Prepared = true;
}
//bind the values.
if (source != null)
{
for (int i = 0; i < source.Length; i++)
{
BindParameter(Statement, i + 1, source[i], Connection.StoreDateTimeAsTicks);
}
}
var cols = new TableColumn[SQLite3.ColumnCount(Statement)];
for (int i = 0; i < cols.Length; i++)
{
var name = SQLite3.ColumnNameUTF8(Statement, i);
cols[i] = map.FindColumn(name);
}
while (SQLite3.Step(Statement) == Result.Row)
{
var obj = map.CreateInstance();
for (int i = 0; i < cols.Length; i++)
{
if (cols[i] == null)
{
continue;
}
var colType = SQLite3.ColumnType(Statement, i);
var val = ReadCol(Statement, i, colType, cols[i].ColumnType, cols[i].PropertyDefaultValue);
cols[i].SetValue(obj, val);
}
OnInstanceCreated(obj);
yield return((T)obj);
}
if (r == Result.Done || r == Result.OK)
{
}
else
{
var msg = SQLite3.GetErrorMessageUTF8(Connection.Handle);
var ex = new SQLiteException(r, msg, sql: CommandText);
ex.PopulateColumnFromTableMapping(map);
throw ex;
}
}
finally
{
if (Statement != null)
{
SQLite3.Reset(Statement);
}
sw.Stop();
Log(sw);
OnExecutionEnded();
}
}
public NotifyTableChangedEventArgs(TableMapping table, NotifyTableChangedAction action, int count)
{
Table = table;
Action = action;
Count = count;
}
public static NotNullConstraintViolationException New(SQLiteException exception, TableMapping mapping, object obj)
{
return(new NotNullConstraintViolationException(exception.Result, exception.Message, mapping, obj));
}
public static NotNullConstraintViolationException New(SQLite3.Result r, string message, TableMapping mapping, object obj)
{
return(new NotNullConstraintViolationException(r, message, mapping, obj));
}
protected NotNullConstraintViolationException(SQLite3.Result r, string message, TableMapping mapping, object obj)
: base(r, message)
{
if (mapping != null && obj != null)
{
Columns = from c in mapping.Columns
where !c.IsNullable && c.GetValue(obj) == null
select c;
}
}
/// <summary>
/// Creates a SQLiteCommand given the command text (SQL) with arguments. Place a '?'
/// in the command text for each of the arguments and then executes that command.
/// It returns each row of the result using the specified mapping. This function is
/// only used by libraries in order to query the database via introspection. It is
/// normally not used.
/// </summary>
/// <param name="map">
/// A <see cref="TableMapping"/> to use to convert the resulting rows
/// into objects.
/// </param>
/// <param name="query">
/// The fully escaped SQL.
/// </param>
/// <param name="args">
/// Arguments to substitute for the occurences of '?' in the query.
/// </param>
/// <returns>
/// An enumerable with one result for each row returned by the query.
/// </returns>
public IEnumerable <object> Query(TableMapping map, string query, params object[] args)
{
var cmd = CreateCommand(query, args);
return(cmd.ExecuteQuery(map));
}
public TableQuery(SQLiteConnection conn)
{
Connection = conn;
Table = Connection.GetMapping(typeof(T));
}
TableQuery(SQLiteConnection conn, TableMapping table)
{
Connection = conn;
Table = table;
}
public List <T> ExecuteQuery <T>(TableMapping map)
{
return(ExecuteDeferredQuery <T>(map).ToList());
}
