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//
// OciRowIdDescriptor.cs
//
// Part of managed C#/.NET library System.Data.OracleClient.dll
//
// Part of the Mono class libraries at
// mcs/class/System.Data.OracleClient/System.Data.OracleClient.Oci
//
// Assembly: System.Data.OracleClient.dll
// Namespace: System.Data.OracleClient.Oci
//
// Author:
// Tim Coleman <tim@timcoleman.com>
// Daniel Morgan <monodanmorg@yahoo.com>
//
// Copyright (C) Tim Coleman, 2003
// Copyright (C) Daniel Morgan, 2008
//
using System;
using System.Data.OracleClient;
using System.Runtime.InteropServices;
using System.Text;
namespace System.Data.OracleClient.Oci {
internal sealed class OciRowIdDescriptor : OciDescriptorHandle, IDisposable
{
#region Fields
bool disposed = false;
#endregion // Fields
#region Constructors
public OciRowIdDescriptor (OciHandle parent, IntPtr newHandle)
: base (OciHandleType.RowId, parent, newHandle)
{
}
#endregion // Constructors
#region Methods
protected override void Dispose (bool disposing)
{
if (!disposed) {
disposed = true;
base.Dispose (disposing);
}
}
//FIXME: This method only exists in Oracle 9i client and above
[DllImport ("oci")]
static extern int OCIRowidToChar (IntPtr rowidDesc,
IntPtr outbfp,
ref ushort outbflp,
IntPtr errhp);
[MonoTODO ("Only will work with 9i and above. Get it to work for 8i as well.")]
internal string GetRowIdToString (OciErrorHandle errorHandle)
{
string output = String.Empty;
int len = 18; // Universal ROWID has a length of 18
int maxByteCount = Encoding.UTF8.GetMaxByteCount (len);
IntPtr outputPtr = OciCalls.AllocateClear (maxByteCount);
int status = 0;
ushort u = (ushort) maxByteCount;
status = OCIRowidToChar (Handle,
outputPtr,
ref u,
errorHandle);
if (status != 0) {
OciErrorInfo info = errorHandle.HandleError ();
throw new OracleException (info.ErrorCode, info.ErrorMessage);
}
if (outputPtr != IntPtr.Zero && maxByteCount > 0) {
object str = Marshal.PtrToStringAnsi (outputPtr, len);
if (str != null)
output = String.Copy ((string) str);
}
return output;
}
#endregion // Methods
}
}
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