/// <summary>Store the column value in the database.</summary>
public override void Serialize(EseCursorBase cur, JET_COLUMNID idColumn, object value, bool bNewRecord)
{
if (!bNewRecord)
{
// If this is an UPDATE operation, erase the old values.
JET_SETINFO si = new JET_SETINFO();
for (int itg = GetValuesCountSilent(cur, idColumn); itg > 0; itg--)
{
si.ibLongValue = 0;
si.itagSequence = itg;
Api.JetSetColumn(cur.idSession, cur.idTable, idColumn,
null, 0, SetColumnGrbit.None, si);
}
}
var arr = value as int[];
if (null == arr)
{
return;
}
// Set new values
foreach (var s in arr)
{
AddValue(cur, idColumn, s);
}
}
// Get the multiple values as the int[]
int[] GetValues(EseCursorBase cur, JET_COLUMNID idColumn)
{
int nValues = GetValuesCount(cur, idColumn);
var res = new int[nValues];
if (0 == nValues)
{
return(res);
}
byte[] buff = new byte[sizeof(int)];
JET_RETINFO ri = new JET_RETINFO();
for (int itg = 1; itg <= nValues; itg++)
{
ri.itagSequence = itg;
int cbSize;
Api.JetRetrieveColumn(cur.idSession, cur.idTable, idColumn,
buff, buff.Length, out cbSize, RetrieveColumnGrbit.None, ri);
if (cbSize != buff.Length)
{
throw new SerializationException();
}
res[itg - 1] = BitConverter.ToInt32(buff, 0);
}
return(res);
}
// Get the multiple values as the List<string>
List <string> GetValues(EseCursorBase cur, JET_COLUMNID idColumn)
{
int nValues = GetValuesCount(cur, idColumn);
List <string> res = new List <string>(nValues);
if (0 == nValues)
{
return(res);
}
byte[] buff = new byte[s_cbMaxValueLength];
System.Text.Encoding enc = getEncoding();
JET_RETINFO ri = new JET_RETINFO();
for (int itg = 1; itg <= nValues; itg++)
{
ri.itagSequence = itg;
int cbSize;
Api.JetRetrieveColumn(cur.idSession, cur.idTable, idColumn,
buff, buff.Length, out cbSize, RetrieveColumnGrbit.None, ri);
if (cbSize >= 0)
{
res.Add(enc.GetString(buff, 0, cbSize));
}
else
{
res.Add(null);
}
}
return(res);
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
byte[] res = Api.RetrieveColumn(cur.idSession, cur.idTable, idColumn);
if (null == res || 0 == res.Length)
{
if (bFieldNullable)
{
return(null);
}
throw new SerializationException("The column is marked 'ColumnNotNULL', however the NULL value was pulled from the database.");
}
if (16 != res.Length)
{
throw new SerializationException("The column of type Decimal must contain exactly 16 bytes.");
}
Int32[] bits = new Int32[4]
{
BitConverter.ToInt32(res, 0),
BitConverter.ToInt32(res, 4),
BitConverter.ToInt32(res, 8),
BitConverter.ToInt32(res, 12),
};
return(new Decimal(bits));
}
static bool isDirectory(EseCursorBase cur)
{
bool?val = Api.RetrieveColumnAsBoolean(cur.idSession, cur.idTable,
colIsDirectory, RetrieveColumnGrbit.RetrieveFromIndex);
return(val.HasValue && val.Value);
}
/// <summary>Make the search key for this column.</summary>
public override void MakeKey(EseCursorBase cur, object value, MakeKeyGrbit flags)
{
if (makeNullKey(cur, value, flags))
{
return;
}
Api.MakeKey(cur.idSession, cur.idTable, toOac(Convert.ToDecimal(value)), flags);
}
/// <summary>Make the search key for this column.</summary>
public override void MakeKey(EseCursorBase cur, object val, MakeKeyGrbit flags)
{
if (makeNullKey(cur, val, flags))
{
return;
}
Api.MakeKey(cur.idSession, cur.idTable, Convert.ToInt64(val), flags);
}
// Append the given value to this column
void AddValue(EseCursorBase cur, JET_COLUMNID idColumn, int val)
{
byte[] data = BitConverter.GetBytes(val);
JET_SETINFO si = new JET_SETINFO();
si.itagSequence = 0;
Api.JetSetColumn(cur.idSession, cur.idTable, idColumn, data, data.Length, SetColumnGrbit.None, si);
}
/// <summary>Store the column value in the database.</summary>
public override void Serialize(EseCursorBase cur, JET_COLUMNID idColumn, object value, bool bNewRecord)
{
if (serializeNull(cur, idColumn, value))
{
return;
}
Api.SetColumn(cur.idSession, cur.idTable, idColumn, Convert.ToInt32(value));
}
/// <summary>Open the stream as read-write.</summary>
/// <param name="cur">The cursor; it must be on the same table.</param>
/// <returns>The read-write ColumnStream object</returns>
/// <remarks>
/// <para>Calling this method will change DB cursor position, setting it to the row where the record is located.</para>
/// <para><b>NB!</b> You must call Dispose() on the returned stream.
/// Failing to do that will cancel the update and leak the unmanaged resources.</para>
/// </remarks>
public ColumnStream Write(EseCursorBase cur)
{
if (!PositionOnTheRecord(cur))
{
return(null);
}
return(new ReadWriteColumnStream(cur, idColumn));
}
/// <summary>Store the column value in the database.</summary>
public override void Serialize(EseCursorBase cur, JET_COLUMNID idColumn, object value, bool bNewRecord)
{
if (serializeNull(cur, idColumn, value))
{
return;
}
DateTime dt = (DateTime)(value);
Api.SetColumn(cur.idSession, cur.idTable, idColumn, getTicks(dt));
}
/// <summary>Store the column value in the database.</summary>
public override void Serialize(EseCursorBase cur, JET_COLUMNID idColumn, object value, bool bNewRecord)
{
if (serializeNull(cur, idColumn, value))
{
return;
}
long lv = toOac(Convert.ToDecimal(value));
Api.SetColumn(cur.idSession, cur.idTable, idColumn, lv);
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
int?res = Api.RetrieveColumnAsInt32(cur.idSession, cur.idTable, idColumn);
if (null == res)
{
return(null);
}
return(Enum.ToObject(m_enumType, res));
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
int?res = Api.RetrieveColumnAsInt32(cur.idSession, cur.idTable, idColumn);
if (!bFieldNullable)
{
return(res.Value);
}
return(res);
}
/// <summary>Make the search key for this column.</summary>
/// <param name="cur">The cursor to create the key on.</param>
/// <param name="val">This object must be a string, otherwise an exception will be thrown.</param>
/// <param name="flags">Key options.</param>
public override void MakeKey(EseCursorBase cur, object val, MakeKeyGrbit flags)
{
if (val is string)
{
Api.MakeKey(cur.idSession, cur.idTable, val as string, getEncoding(), flags);
}
else
{
makeKeyException(val);
}
}
// Same as GetValuesCount, but no exception is ever thrown, instead zero is being silently returned.
int GetValuesCountSilent(EseCursorBase cur, JET_COLUMNID idColumn)
{
try
{
return(GetValuesCount(cur, idColumn));
}
catch (System.Exception)
{
return(0);
}
}
/// <summary>Make the search key for this column.</summary>
public override void MakeKey(EseCursorBase cur, object val, MakeKeyGrbit flags)
{
if (m_bFieldNullable && val == null)
{
Api.MakeKey(cur.idSession, cur.idTable, null, flags);
}
else
{
Api.MakeKey(cur.idSession, cur.idTable, Convert.ToBoolean(val), flags);
}
}
/// <summary>Retrieve copy of the auto-incremented value.</summary>
/// <remarks>See the <a href="http://managedesent.codeplex.com/wikipage?title=HowDoI" target="_blank" >"How do I?" page in managed ESENT wiki</a>,
/// section "How Do I Retrieve an Auto-Increment Column Value?"</remarks>
/// <param name="cur"></param>
/// <param name="idColumn"></param>
public object RetrieveCopy(EseCursorBase cur, JET_COLUMNID idColumn)
{
if (this.m_cp == JET_coltyp.Long)
{
return(Api.RetrieveColumnAsInt32(cur.idSession, cur.idTable, idColumn, RetrieveColumnGrbit.RetrieveCopy) ?? null);
}
if (this.m_cp == JET_coltyp.Currency)
{
return(Api.RetrieveColumnAsInt64(cur.idSession, cur.idTable, idColumn, RetrieveColumnGrbit.RetrieveCopy) ?? null);
}
throw new System.Runtime.Serialization.SerializationException();
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
if (this.m_cp == JET_coltyp.Long)
{
return(Api.RetrieveColumnAsInt32(cur.idSession, cur.idTable, idColumn).Value);
}
if (this.m_cp == JET_coltyp.Currency)
{
return(Api.RetrieveColumnAsInt64(cur.idSession, cur.idTable, idColumn).Value);
}
throw new System.Runtime.Serialization.SerializationException();
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
using (var stm = new ColumnStream(cur.idSession, cur.idTable, idColumn))
{
if (stm.Length < 1)
{
return(null);
}
using (var br = XmlDictionaryReader.CreateBinaryReader(stm, this.dict, XmlDictionaryReaderQuotas.Max))
return(m_serializer.ReadObject(br));
}
}
// Get the count of the values stored in the multi-valued column.
int GetValuesCount(EseCursorBase cur, JET_COLUMNID idColumn)
{
// See http://stackoverflow.com/questions/2929587 for more info
JET_RETRIEVECOLUMN jrc = new JET_RETRIEVECOLUMN();
jrc.columnid = idColumn;
jrc.itagSequence = 0;
Api.JetRetrieveColumns(cur.idSession, cur.idTable, new JET_RETRIEVECOLUMN[1] {
jrc
}, 1);
return(jrc.itagSequence);
}
/// <summary>Make the search key for this column.</summary>
public override void MakeKey(EseCursorBase cur, object val, MakeKeyGrbit flags)
{
if (makeNullKey(cur, val, flags))
{
return;
}
if (!val.GetType().GetTypeInfo().IsPrimitive)
{
makeKeyException(val);
}
Api.MakeKey(cur.idSession, cur.idTable, Convert.ToByte(val), flags);
}
/// <summary>Try to store a null value.</summary>
/// <param name="cur">ESENT cursor</param>
/// <param name="idColumn">ID of the column</param>
/// <param name="value">The value that might be null. If it's not null, this method silently returns false.</param>
/// <returns>true if the field is nullable, and the value is null, and JetSetColumn was called.</returns>
protected bool serializeNull(EseCursorBase cur, JET_COLUMNID idColumn, object value)
{
if (!bFieldNullable)
{
return(false);
}
if (value != null)
{
return(false);
}
Api.SetColumn(cur.idSession, cur.idTable, idColumn, null);
return(true);
}
/// <summary>Try to make a null key.</summary>
/// <param name="cur">ESENT cursor.</param>
/// <param name="value">The value that might be null. If it's not null, this method silently returns false. If it is null but the column is not nullable, this method throws an exception.</param>
/// <param name="flags">Key options.</param>
/// <returns>true if the field is nullable, and the value is null, and the JetMakeKey was called.</returns>
protected bool makeNullKey(EseCursorBase cur, object value, MakeKeyGrbit flags)
{
if (value != null)
{
return(false);
}
if (!bFieldNullable)
{
makeKeyException(value);
}
Api.MakeKey(cur.idSession, cur.idTable, null, flags);
return(true);
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
double?res = Api.RetrieveColumnAsDouble(cur.idSession, cur.idTable, idColumn);
if (null == res)
{
if (bFieldNullable)
{
return(null);
}
throw new SerializationException("The column is marked 'ColumnNotNULL', however the NULL value was pulled from the database.");
}
return(res.Value);
}
/// <summary>Construct the object</summary>
/// <param name="cur"></param>
/// <param name="_idColumn"></param>
public EseStreamValue(EseCursorBase cur, JET_COLUMNID _idColumn)
{
idColumn = _idColumn;
bk = cur.getBookmark();
tableName = cur.tableName;
// Fetch the length.
// Copy-pasted from Microsoft.Isam.Esent.Interop.ColumnStream.Length get
var retinfo = new JET_RETINFO {
itagSequence = 1, ibLongValue = 0
};
Api.JetRetrieveColumn(cur.idSession, cur.idTable, idColumn, null, 0, out length, RetrieveColumnGrbit.RetrieveCopy, retinfo);
}
/// <summary>Retrieve the column value from the DB.</summary>
public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
{
long?val = Api.RetrieveColumnAsInt64(cur.idSession, cur.idTable, idColumn);
if (null == val)
{
if (bFieldNullable)
{
return(null);
}
throw new SerializationException("The column is marked 'ColumnNotNULL', however the NULL value was pulled from the database.");
}
return(getDateTime(val.Value));
}
/// <summary>Make the search key for this column.</summary>
/// <remarks><b>NB!</b> The native GUID columns are only supported by ESENT shipped with Vista and above.
/// You'll get different sort order between Server 2003 and Vista.
/// On Server 2003 and below, the sort order will be just memcmp() of the GUID's 16 bytes, while on Vista and above the sort order will be OK.</remarks>
public override void MakeKey(EseCursorBase cur, object value, MakeKeyGrbit flags)
{
if (m_bFieldNullable && value == null)
{
Api.MakeKey(cur.idSession, cur.idTable, null, flags);
}
else if (value is Guid)
{
Api.MakeKey(cur.idSession, cur.idTable, (Guid)value, flags);
}
else
{
makeKeyException(value);
}
}
/// <summary>Make the search key for this column.</summary>
public override void MakeKey(EseCursorBase cur, object val, MakeKeyGrbit flags)
{
if (this.m_cp == JET_coltyp.Long)
{
Api.MakeKey(cur.idSession, cur.idTable, Convert.ToInt32(val), flags);
}
else if (this.m_cp == JET_coltyp.Currency)
{
Api.MakeKey(cur.idSession, cur.idTable, Convert.ToInt64(val), flags);
}
else
{
throw new System.Runtime.Serialization.SerializationException();
}
}
/// <summary>Make the search key for this column.</summary>
public override void MakeKey(EseCursorBase cur, object val, MakeKeyGrbit flags)
{
if (val == null)
{
Api.MakeKey(cur.idSession, cur.idTable, null, flags);
}
else if (val is DateTime)
{
Api.MakeKey(cur.idSession, cur.idTable, getTicks((DateTime)val), flags);
}
else
{
makeKeyException(val);
}
}
