public void GetString()
{
HsqlDataReader testSubject = NewTestSubject();
string actual = testSubject.GetString(ColumnOrdinalFor.VarChar);
Assert.Fail("TODO");
}
/// <summary>
/// Returns the collection of currently valid initial schema names,
/// given the specified context.
/// </summary>
/// <param name="context">
/// An <see cref="ITypeDescriptorContext"></see> whose <c>Instance</c>
/// property supplies the <c>HsqlConnectionStringBuilder</c> use to
/// connect to a data source to retrieve the currently valid initial
/// schema names.
/// </param>
/// <returns>
/// A <see cref="TypeConverter.StandardValuesCollection"/> that holds
/// collection of currently valid initial schema names.
/// </returns>
public override TypeConverter.StandardValuesCollection GetStandardValues(
ITypeDescriptorContext context)
{
if (!IsStandardValuesSupported(context))
{
return(null);
}
List <string> values = new List <string>();
try
{
HsqlConnectionStringBuilder builder
= (HsqlConnectionStringBuilder)context.Instance;
// TODO: this is sub-optimal, but is currently the best (only?)
// solution to the problem of how to avoid creating and/or
// leaving open embedded database instances.
if (IsEmbeddedProtocol(builder))
{
builder = new HsqlConnectionStringBuilder(
builder.ConnectionString);
builder.AutoShutdown = true;
builder.IfExists = true;
}
using (HsqlConnection connection = new HsqlConnection())
{
connection.ConnectionString = builder.ConnectionString;
using (HsqlCommand command = new HsqlCommand(
connection,
SchemaQuery))
{
connection.Open();
using (HsqlDataReader reader = command.ExecuteReader())
{
while (reader.Read())
{
values.Add(reader.GetString(0));
}
}
}
}
}
catch (Exception exception)
{
#if DEBUG
Debug.WriteLine(exception);
#endif
}
return(new TypeConverter.StandardValuesCollection(values));
}
/// <summary>
/// Computes the key info dictionary for the column metadata of the
/// given data reader.
/// </summary>
/// <remarks>
/// Depending upon the column metadata already present in the data
/// reader, it may be required to perform further access to the
/// originating data source using the reader's
/// <c>OriginatingConnection</c>. This in turn implies that the
/// <c>OriginatingConnection</c> must be open and must still
/// represent the originating session on the originating data source;
/// otherwise, the reported key info may be incorrect or the attempt
/// access the data source may simply fail.
/// </remarks>
/// <param name="reader">
/// The reader for which to compute the column metadata key info map.
/// </param>
/// <returns>
/// Map {ColumnIdentifier=>KeyInfo}
/// </returns>
/// <exception cref="HsqlDataSourceException">
/// If a data access error occurs.
/// </exception>
internal static Dictionary <ColumnIdentifier, KeyInfo> GetKeyInfo(
HsqlDataReader reader)
{
ResultMetaData metaData = reader.m_result.metaData;
Dictionary <TableIdentifier, object> tableSet
= new Dictionary <TableIdentifier, object>();
object placeholder = new object();
string[] schemaNames = metaData.schemaNames;
string[] tableNames = metaData.tableNames;
string[] columnNames = metaData.colNames;
int count = columnNames.Length;
for (int i = 0; i < count; i++)
{
string tableName = tableNames[i];
string columnName = columnNames[i];
if (string.IsNullOrEmpty(tableName) ||
string.IsNullOrEmpty(columnName))
{ // not a table column
continue;
}
string schemaName = schemaNames[i];
TableIdentifier tableIdentifier = new TableIdentifier(
schemaName, tableName);
tableSet[tableIdentifier] = placeholder;
}
Dictionary <ColumnIdentifier, KeyInfo> columnMap
= new Dictionary <ColumnIdentifier, KeyInfo>();
if (tableSet.Count == 0)
{
return(columnMap);
}
StringBuilder sb = new StringBuilder('(');
count = 0;
foreach (TableIdentifier tableIdentifier in tableSet.Keys)
{
if (count > 0)
{
sb.Append(" OR ");
}
count++;
sb.Append("(bri.table_schem");
string schemaName = tableIdentifier.m_schema;
if (string.IsNullOrEmpty(schemaName))
{
sb.Append(" IS NULL ");
}
else
{
sb.Append(" = ").Append(StringConverter.toQuotedString(
schemaName, '\'', /*escape inner quotes*/ true));
}
string tableName = tableIdentifier.m_table;
sb.Append(" AND bri.table_name = ").Append(
StringConverter.toQuotedString(tableName, '\'',
/*escape inner quotes*/ true));
sb.Append(')');
}
sb.Append(')');
string predicate = sb.ToString();
using (HsqlCommand command =
reader.OriginatingConnection.CreateCommand())
{
command.CommandText = string.Format(KeyInfoQuery, predicate);
command.CommandType = CommandType.Text;
using (HsqlDataReader keyInfoReader = command.ExecuteReader())
{
while (keyInfoReader.Read())
{
bool isKey = keyInfoReader.GetBoolean(3);
if (!isKey)
{
continue;
}
string schema = keyInfoReader.GetString(0);
string table = keyInfoReader.GetString(1);
string column = keyInfoReader.GetString(2);
ColumnIdentifier key = new ColumnIdentifier(schema,
table, column);
if (!columnMap.ContainsKey(key))
{
KeyInfo keyInfo = new KeyInfo();
keyInfo.m_isKey = true;
keyInfo.m_isUnique = false;
columnMap.Add(key, keyInfo);
}
}
}
}
return(columnMap);
}
