//
// Author:
// Rodrigo Moya (rodrigo@ximian.com)
+// Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Rodrigo Moya, 2002
+// Copyright (C) Tim Coleman, 2002
//
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.Common;
+using System.Runtime.InteropServices;
namespace System.Data.OleDb
{
- public sealed class OleDbDataReader : MarshalByRefObject,
- IDataReader, IDisposable, IDataRecord, IEnumerable
+ public sealed class OleDbDataReader : MarshalByRefObject, IDataReader, IDisposable, IDataRecord, IEnumerable
{
+ #region Fields
+
+ private OleDbCommand command;
+ private bool open;
+ private ArrayList gdaResults;
+ private int currentResult;
+ private int currentRow;
+
+ #endregion
+
+ #region Constructors
+
+ internal OleDbDataReader (OleDbCommand command, ArrayList results)
+ {
+ this.command = command;
+ open = true;
+ if (results != null)
+ gdaResults = results;
+ else
+ gdaResults = new ArrayList ();
+ currentResult = -1;
+ currentRow = -1;
+ }
+
+ #endregion
+
+ #region Properties
+
+ public int Depth {
+ [MonoTODO]
+ get {
+ throw new NotImplementedException ();
+ }
+ }
+
+ public int FieldCount {
+ get {
+ if (currentResult < 0 ||
+ currentResult >= gdaResults.Count)
+ return 0;
+
+ return libgda.gda_data_model_get_n_columns (
+ (IntPtr) gdaResults[currentResult]);
+ }
+ }
+
+ public bool IsClosed {
+ get {
+ return !open;
+ }
+ }
+
+ public object this[string name] {
+ [MonoTODO]
+ get {
+ throw new NotImplementedException ();
+ }
+ }
+
+ public object this[int index] {
+ get {
+ return (object) GetValue (index);
+ }
+ }
+
+ public int RecordsAffected {
+ get {
+ int total_rows;
+
+ if (currentResult < 0 ||
+ currentResult >= gdaResults.Count)
+ return 0;
+
+ total_rows = libgda.gda_data_model_get_n_rows (
+ (IntPtr) gdaResults[currentResult]);
+ if (total_rows > 0) {
+ if (FieldCount > 0) {
+ // It's a SELECT statement
+ return -1;
+ }
+ }
+
+ return FieldCount > 0 ? -1 : total_rows;
+ }
+ }
+
+ #endregion
+
+ #region Methods
+
+ public void Close ()
+ {
+ for (int i = 0; i < gdaResults.Count; i++) {
+ IntPtr obj = (IntPtr) gdaResults[i];
+ libgda.FreeObject (obj);
+ gdaResults = null;
+ }
+
+ gdaResults.Clear ();
+
+ open = false;
+ currentResult = -1;
+ currentRow = -1;
+ }
+
+ ~OleDbDataReader ()
+ {
+ if (open)
+ Close ();
+ }
+
+ public bool GetBoolean (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Boolean)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_boolean (value);
+ }
+
+ public byte GetByte (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Tinyint)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_tinyint (value);
+ }
+
+ [MonoTODO]
+ public long GetBytes (int ordinal, long dataIndex, byte[] buffer, int bufferIndex, int length)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public char GetChar (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Tinyint)
+ throw new InvalidCastException ();
+ return (char) libgda.gda_value_get_tinyint (value);
+ }
+
+ [MonoTODO]
+ public long GetChars (int ordinal, long dataIndex, char[] buffer, int bufferIndex, int length)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public OleDbDataReader GetData (int ordinal)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public string GetDataTypeName (int index)
+ {
+ IntPtr attrs;
+ GdaValueType type;
+
+ if (currentResult == -1)
+ return "unknown";
+
+
+ attrs = libgda.gda_data_model_describe_column ((IntPtr) gdaResults[currentResult],
+ index);
+ if (attrs == IntPtr.Zero)
+ return "unknown";
+
+ type = libgda.gda_field_attributes_get_gdatype (attrs);
+ libgda.gda_field_attributes_free (attrs);
+
+ return libgda.gda_type_to_string (type);
+ }
+
+ public DateTime GetDateTime (int ordinal)
+ {
+ IntPtr value;
+ DateTime dt;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) == GdaValueType.Date) {
+ GdaDate gdt;
+
+ gdt = (GdaDate) Marshal.PtrToStructure (libgda.gda_value_get_date (value),
+ typeof (GdaDate));
+ return new DateTime ((int) gdt.year, (int) gdt.month, (int) gdt.day);
+ } else if (libgda.gda_value_get_vtype (value) == GdaValueType.Time) {
+ GdaTime gdt;
+
+ gdt = (GdaTime) Marshal.PtrToStructure (libgda.gda_value_get_time (value),
+ typeof (GdaTime));
+ return new DateTime (0, 0, 0, (int) gdt.hour, (int) gdt.minute, (int) gdt.second, 0);
+ } else if (libgda.gda_value_get_vtype (value) == GdaValueType.Timestamp) {
+ GdaTimestamp gdt;
+
+ gdt = (GdaTimestamp) Marshal.PtrToStructure (libgda.gda_value_get_timestamp (value),
+ typeof (GdaTimestamp));
+
+ return new DateTime ((int) gdt.year, (int) gdt.month, (int) gdt.day,
+ (int) gdt.hour, (int) gdt.minute, (int) gdt.second,
+ (int) gdt.fraction);
+ }
+
+ throw new InvalidCastException ();
+ }
+
+ [MonoTODO]
+ public decimal GetDecimal (int ordinal)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public double GetDouble (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Double)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_double (value);
+ }
+
+ [MonoTODO]
+ public Type GetFieldType (int index)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public float GetFloat (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Single)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_single (value);
+ }
+
+ [MonoTODO]
+ public Guid GetGuid (int ordinal)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public short GetInt16 (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Smallint)
+ throw new InvalidCastException ();
+ return (short) libgda.gda_value_get_smallint (value);
+ }
+
+ public int GetInt32 (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Integer)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_integer (value);
+ }
+
+ public long GetInt64 (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.Bigint)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_bigint (value);
+ }
+
+ public string GetName (int index)
+ {
+ if (currentResult == -1)
+ return null;
+
+ return libgda.gda_data_model_get_column_title (
+ (IntPtr) gdaResults[currentResult], index);
+ }
+
+ public int GetOrdinal (string name)
+ {
+ if (currentResult == -1)
+ throw new IndexOutOfRangeException ();
+
+ for (int i = 0; i < FieldCount; i++) {
+ if (GetName (i) == name)
+ return i;
+ }
+
+ throw new IndexOutOfRangeException ();
+ }
+
+ [MonoTODO]
+ public DataTable GetSchemaTable ()
+ {
+ throw new NotImplementedException ();
+ }
+
+ public string GetString (int ordinal)
+ {
+ IntPtr value;
+
+ if (currentResult == -1)
+ throw new InvalidCastException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new InvalidCastException ();
+
+ if (libgda.gda_value_get_vtype (value) != GdaValueType.String)
+ throw new InvalidCastException ();
+ return libgda.gda_value_get_string (value);
+ }
+
+ [MonoTODO]
+ public TimeSpan GetTimeSpan (int ordinal)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public object GetValue (int ordinal)
+ {
+ IntPtr value;
+ GdaValueType type;
+
+ if (currentResult == -1)
+ throw new IndexOutOfRangeException ();
+
+ value = libgda.gda_data_model_get_value_at ((IntPtr) gdaResults[currentResult],
+ ordinal, currentRow);
+ if (value == IntPtr.Zero)
+ throw new IndexOutOfRangeException ();
+
+ type = libgda.gda_value_get_vtype (value);
+ switch (type) {
+ case GdaValueType.Bigint : return GetInt64 (ordinal);
+ case GdaValueType.Boolean : return GetBoolean (ordinal);
+ case GdaValueType.Date : return GetDateTime (ordinal);
+ case GdaValueType.Double : return GetDouble (ordinal);
+ case GdaValueType.Integer : return GetInt32 (ordinal);
+ case GdaValueType.Single : return GetFloat (ordinal);
+ case GdaValueType.Smallint : return GetByte (ordinal);
+ case GdaValueType.String : return GetString (ordinal);
+ case GdaValueType.Time : return GetDateTime (ordinal);
+ case GdaValueType.Timestamp : return GetDateTime (ordinal);
+ case GdaValueType.Tinyint : return GetByte (ordinal);
+ }
+
+ return (object) libgda.gda_value_stringify (value);
+ }
+
+ [MonoTODO]
+ public int GetValues (object[] values)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ IDataReader IDataRecord.GetData (int ordinal)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ void IDisposable.Dispose ()
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ IEnumerator IEnumerable.GetEnumerator ()
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public bool IsDBNull (int ordinal)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public bool NextResult ()
+ {
+ int i = currentResult + 1;
+ if (i >= 0 && i < gdaResults.Count) {
+ currentResult++;
+ return true;
+ }
+
+ return false;
+ }
+
+ public bool Read ()
+ {
+ if (currentResult < 0 ||
+ currentResult >= gdaResults.Count)
+ return false;
+
+ currentRow++;
+ if (currentRow <
+ libgda.gda_data_model_get_n_rows ((IntPtr) gdaResults[currentResult]))
+ return true;
+
+ return false;
+ }
+
+ #endregion
}
}
projects / mono.git / blobdiff