protected static void DeriveParameters (AbstractDbCommand command) {
if (command.Connection.State != ConnectionState.Open) {
throw new InvalidOperationException("DeriveParameters requires an open and available Connection. The connection's current state is Closed.");
}
if(command.CommandType != CommandType.StoredProcedure) {
throw ExceptionHelper.DeriveParametersNotSupported(command.GetType(),command.CommandType);
}
ArrayList parameters = command.DeriveParameters(command.CommandText, true);
command.Parameters.Clear();
foreach (AbstractDbParameter param in parameters) {
command.Parameters.Add(param.Clone());
}
}
protected sealed override DbParameterCollection CreateParameterCollection(AbstractDbCommand parent)
{
return new OleDbParameterCollection((OleDbCommand)parent);
}
protected AbstractDataReader(AbstractDbCommand command) {
_command = command;
if (_command.Connection != null) {
((AbstractDBConnection)_command.Connection).AddReference(this);
}
}
protected sealed override DbParameterCollection CreateParameterCollection(AbstractDbCommand parent) {
return new OracleParameterCollection((OracleCommand)parent);
}
public AbstractDbParameterCollection(DbCommand parent)
{
_parent = (AbstractDbCommand)parent;
}
internal ArrayList GetProcedureColumns(String procedureString, AbstractDbCommand command)
{
ArrayList col = new ArrayList();
try {
ObjectNameResolver[] nameResolvers = SyntaxPatterns;
java.sql.ResultSet res = null;
string catalog = null;
string schema = null;
string spname = null;
java.sql.DatabaseMetaData metadata = JdbcConnection.getMetaData();
bool storesUpperCaseIdentifiers = false;
bool storesLowerCaseIdentifiers = false;
try {
storesUpperCaseIdentifiers = metadata.storesUpperCaseIdentifiers();
storesLowerCaseIdentifiers = metadata.storesLowerCaseIdentifiers();
}
catch (SQLException e) {
// suppress
}
for(int i=0; i < nameResolvers.Length; i++) {
ObjectNameResolver nameResolver = nameResolvers[i];
Match match = nameResolver.Match(procedureString);
if (match.Success) {
spname = ObjectNameResolver.GetName(match);
schema = ObjectNameResolver.GetSchema(match);
catalog = ObjectNameResolver.GetCatalog(match);
// make all identifiers uppercase or lowercase according to database metadata
if (storesUpperCaseIdentifiers) {
spname = (spname.Length > 0) ? spname.ToUpper() : null;
schema = (schema.Length > 0) ? schema.ToUpper() : null;
catalog = (catalog.Length > 0) ? catalog.ToUpper() : null;
}
else if (storesLowerCaseIdentifiers) {
spname = (spname.Length > 0) ? spname.ToLower() : null;
schema = (schema.Length > 0) ? schema.ToLower() : null;
catalog = (catalog.Length > 0) ? catalog.ToLower() : null;
}
else {
spname = (spname.Length > 0) ? spname : null;
schema = (schema.Length > 0) ? schema : null;
catalog = (catalog.Length > 0) ? catalog : null;
}
// catalog from db is always in correct caps
if (catalog == null) {
catalog = JdbcConnection.getCatalog();
}
try {
// always get the first procedure that db returns
res = metadata.getProcedures(catalog, schema, spname);
if (res.next()) {
catalog = res.getString(1);
schema = res.getString(2);
spname = res.getString(3);
break;
}
spname = null;
}
catch { // suppress exception
return null;
}
finally {
if (res != null) {
res.close();
}
}
}
}
if (spname == null || spname.Length == 0) {
return null;
}
try {
// get procedure columns based o procedure metadata
res = metadata.getProcedureColumns(catalog, schema, spname, null);
while (res.next()) {
// since there is still a possibility that some of the parameters to getProcedureColumn were nulls,
// we need to filter the results with strict matching
if ((res.getString(1) != catalog ) || (res.getString(2) != schema) || (res.getString(3) != spname)) {
continue;
}
AbstractDbParameter parameter = (AbstractDbParameter)command.CreateParameter();
parameter.SetParameterName(res);
parameter.SetParameterDbType(res);
parameter.SetSpecialFeatures(res);
//get parameter direction
short direction = res.getShort("COLUMN_TYPE");
if(direction == 1) //DatabaseMetaData.procedureColumnIn
parameter.Direction = ParameterDirection.Input;
else if(direction == 2) //DatabaseMetaData.procedureColumnInOut
parameter.Direction = ParameterDirection.InputOutput;
else if(direction == 4) //DatabaseMetaData.procedureColumnOut
parameter.Direction = ParameterDirection.Output;
else if(direction == 5) //DatabaseMetaData.procedureColumnReturn
parameter.Direction = ParameterDirection.ReturnValue;
//get parameter precision and scale
parameter.SetParameterPrecisionAndScale(res);
parameter.SetParameterSize(res);
parameter.SetParameterIsNullable(res);
col.Add(parameter);
}
}
finally {
if (res != null) {
res.close();
}
}
}
catch(Exception e) {
//supress
#if DEBUG
Console.WriteLine("Exception catched at AbstractDBConnection.GetProcedureColumns() : {0}\n{1}\n{2}",e.GetType().FullName,e.Message,e.StackTrace);
#endif
}
return col;
}
