/// <summary>
/// Executes the SQL statment over the Data Base connected
/// </summary>
/// <param name="onSql">This parameter has the current SQL statment</param>
/// <param name="onFilterList">List of filters to check</param>
/// <param name="comparer">This parameter has all the information refering to the order criteria to add to SQL statment</param>
/// <param name="startRowOid">This parameter has the OID necessary to start the search</param>
/// <param name="blockSize">This parameter represents the number of instances to be returned</param>
public override ONCollection ExecuteSql(ONSql onSql, ONFilterList onFilterList, ONDisplaySet displaySet, ONOrderCriteria orderCriteria, ONOid startRowOid, int blockSize)
{
AeronaveCollection lQuery = null;
bool lWithStartRow = (startRowOid != null).TypedValue;
long lCount = -1;
if (!lWithStartRow)
lCount = 0;
IDataReader lDataReader = null;
ONSQLConnection lOnSQLConnection = null;
try
{
lDataReader = Execute(onSql) as IDataReader;
AeronaveInstance lInstance = null;
AeronaveInstance lAntInstance = null;
if (lDataReader != null)
{
object[] lColumns;
if(displaySet == null)
lColumns = new object[4];
else
lColumns = new object[displaySet.ElementsInData];
lQuery = new AeronaveCollection(OnContext);
bool lFoundStartRow = false;
while (lDataReader.Read())
{
lAntInstance = lInstance;
// Read Columns
lDataReader.GetValues(lColumns);
// Read Instance
int lIndex = 0;
lInstance = LoadFacet(OnContext, displaySet, lColumns, ref lIndex);
// Read related attributes
if (displaySet != null)
LoadRelated(OnContext, displaySet, lColumns, lIndex, lInstance);
if (lCount >= 0) // Add the load instance
{
if ((onFilterList == null) || (!onFilterList.InMemory))
{
// Add to the Instance list
lQuery.Add(lInstance);
lCount++;
}
else
{
ONSQLConnection lSQLConnectionOld = (ONSQLConnection) lInstance.OnContext.SqlConnection;
// Set another connection because it is imposible to use
// the same connection that is used in the DataReader
if (lOnSQLConnection == null)
lOnSQLConnection = GetConnection();
lInstance.OnContext.SqlConnection = lOnSQLConnection;
if (onFilterList.FilterInMemory(lInstance))
{
// Add to the Instance list
lQuery.Add(lInstance);
lCount++;
}
lInstance.OnContext.SqlConnection = lSQLConnectionOld;
}
}
else
{
if ((orderCriteria != null) && (orderCriteria.InMemory)) // Need to load for ordering in memory after loading
{
if (lAntInstance != null)
{
// Set another connection because it is imposible to use
// the same connection that is used in the DataReader
ONSQLConnection lOnSQLConnectionOld = lInstance.OnContext.SqlConnection as ONSQLConnection;
if (lOnSQLConnection == null)
lOnSQLConnection = GetConnection();
lInstance.OnContext.SqlConnection = lOnSQLConnection;
int lCompare = orderCriteria.CompareSql(lInstance, lAntInstance);
if (lCompare != 0)
{
if (lFoundStartRow)
lCount = 1;
else
lQuery.Clear();
}
// Restores the old connection
lInstance.OnContext.SqlConnection = lOnSQLConnectionOld;
}
if ((onFilterList == null) || (!onFilterList.InMemory))
{
// Add to the Instance list
lQuery.Add(lInstance);
}
else
{
ONSQLConnection lSQLConnectionOld = (ONSQLConnection)lInstance.OnContext.SqlConnection;
// Set another connection because it is imposible to use
// the same connection that is used in the DataReader
if (lOnSQLConnection == null)
lOnSQLConnection = GetConnection();
lInstance.OnContext.SqlConnection = lOnSQLConnection;
if (onFilterList.FilterInMemory(lInstance))
{
// Add to the Instance list
lQuery.Add(lInstance);
}
else
lCount--;
lInstance.OnContext.SqlConnection = lSQLConnectionOld;
}
if (lInstance.Oid.Equals(startRowOid))
lFoundStartRow = true;
}
else if (lInstance.Oid.Equals(startRowOid)) // Search the start row
lCount = 0;
}
// Stop loading
if ((blockSize != 0) && (lCount > blockSize))
{
if (orderCriteria == null)
break;
else
{
// Set another connection because it is imposible to use
// the same connection that is used in the DataReader
ONSQLConnection lOnSQLConnectionOld = lInstance.OnContext.SqlConnection as ONSQLConnection;
if (lOnSQLConnection == null)
lOnSQLConnection = GetConnection();
lInstance.OnContext.SqlConnection = lOnSQLConnection;
int lCompare = orderCriteria.CompareSql(lInstance, lAntInstance);
// Restores the old connection
lInstance.OnContext.SqlConnection = lOnSQLConnectionOld;
if (lCompare > 0)
break;
}
}
}
}
}
catch (Exception e)
{
string ltraceItem = "Method: ExecuteSql, Component: AeronaveData";
if (e is ONSystemException)
{
ONSystemException lException = e as ONSystemException;
lException.addTraceInformation(ltraceItem);
throw lException;
}
throw new ONSystemException(e, ltraceItem);
}
finally
{
if (lOnSQLConnection != null)
ONDBData.CloseConnection(lOnSQLConnection);
if (lDataReader != null)
{
if (mSqlCommand != null)
mSqlCommand.Cancel();
lDataReader.Close();
}
Close();
if ((onFilterList != null) && (onFilterList.InMemory) && !lWithStartRow && (lCount <= blockSize))
lQuery.totalNumInstances = lQuery.Count;
}
return lQuery;
}
/// <summary>
/// Execution of a sql
/// </summary>
/// <param name="onSql">Sentence SQL to be executed</param>
/// <param name="onFilterList">List of filters to check</param>
/// <param name="comparer">Order Criteria that must be followed by the query</param>
/// <param name="startRowOID">OID frontier</param>
/// <param name="blockSize">Number of instances to be returned</param>
public virtual ONCollection ExecuteSql(ONSql onSql, ONFilterList onFilterList, ONDisplaySet displaySet, ONOrderCriteria comparer, ONOid startRowOID, int blockSize)
{
return null;
}
/// <summary>
/// Execution of a query
/// </summary>
/// <param name="onSql">Sentence SQL to be executed</param>
public ONCollection ExecuteQuery(ONSql onSql)
{
return ExecuteSql(onSql, null, null, null, null, 0);
}
/// <summary>
/// Executes the sentence SQL fixing the parameters needed.
/// </summary>
/// <param name="onSql">Sentence SQL to be executed</param>
public object Execute(ONSql onSql)
{
ArrayList lSqlParameters;
string lSql = onSql.GenerateSQL(out lSqlParameters);
if (onSql is ONSqlScalar)
return ExecuteScalar(lSql, lSqlParameters);
else if (onSql is ONSqlSelect)
return ExecuteReader(lSql, lSqlParameters);
else if (onSql is ONSqlInsertAutoInc)
return ExecuteInsertAutoIncScalar(lSql, lSqlParameters);
else
ExecuteNonQuery(lSql, lSqlParameters);
return null;
}
public virtual ONCollection ExecuteQuery(ONSql onSql, ONFilterList onFilterList, ONOrderCriteria comparer, ONOid startRowOID, int blockSize, ONInstance instance)
{
return null;
}
/// <summary>
/// Execution of a query
/// </summary>
/// <param name="onSql">Sentence SQL to be executed</param>
/// <param name="comparer">Order Criteria that must be followed by the query</param>
/// <param name="startRowOID">OID frontier</param>
/// <param name="blockSize">Number of instances to be returned</param>
public ONCollection ExecuteQuery(ONSql onSql, ONInstance instance)
{
return ExecuteQuery(onSql, null, null, null, 0, instance);
}