/// <summary>
///
/// </summary>
/// <param name="dbPath">dbFilePath must point to the DIT file on the local computer.</param>
/// <param name="logPath">The path should point to a writeable folder on the local computer, where ESE log files will be created. If not specified, then temp folder will be used.</param>
public DirectoryContext(string dbFilePath, bool readOnly, string logDirectoryPath = null)
{
if (!File.Exists(dbFilePath))
{
// TODO: Extract as resource
throw new FileNotFoundException("The specified database file does not exist.", dbFilePath);
}
int pageSize = DirectoryContext.GetDBPageSize(dbFilePath);
string dbDirectoryPath = Path.GetDirectoryName(dbFilePath);
string checkpointDirectoryPath = dbDirectoryPath;
string tempDirectoryPath = dbDirectoryPath;
if (logDirectoryPath != null)
{
if (!Directory.Exists(logDirectoryPath))
{
// TODO: Extract as resource
throw new FileNotFoundException("The specified log directory does not exist.", logDirectoryPath);
}
}
else
{
logDirectoryPath = dbDirectoryPath;
}
// TODO: Exception handling?
// HACK: IsamInstance constructor throws AccessDenied Exception when the path does not end with a backslash.
// TODO: Const isam instance name
string instanceName = "DSInternals";
this.instance = new IsamInstance(AddPathSeparator(checkpointDirectoryPath), AddPathSeparator(logDirectoryPath), AddPathSeparator(tempDirectoryPath), ADConstants.EseBaseName, instanceName, readOnly, pageSize);
try
{
var isamParameters = this.instance.IsamSystemParameters;
// TODO: Add param explanations
isamParameters.LogFileSize = ADConstants.EseLogFileSize;
isamParameters.DeleteOutOfRangeLogs = true;
isamParameters.EnableIndexChecking = 1;
isamParameters.EnableIndexCleanup = true;
isamParameters.CircularLog = true;
// TODO: Configure additional ISAM parameters
// this.instance.IsamSystemParameters.EnableOnlineDefrag = false;
// JET_paramDeleteOldLogs = 1
this.session = this.instance.CreateSession();
this.session.AttachDatabase(dbFilePath);
this.attachedDatabasePath = dbFilePath;
this.database = this.session.OpenDatabase(dbFilePath);
this.Schema = new DirectorySchema(this.database);
this.SecurityDescriptorRersolver = new SecurityDescriptorRersolver(this.database);
this.DistinguishedNameResolver = new DistinguishedNameResolver(this.database, this.Schema);
this.LinkResolver = new LinkResolver(this.database, this.Schema);
this.DomainController = new DomainController(this);
}
catch
{
// Free resources if anything failed
this.Dispose();
throw;
}
}
// TODO: Internal?
// TODO: ISchema
public DirectorySchema(IsamDatabase database)
{
TableDefinition dataTable = database.Tables[ADConstants.DataTableName];
this.LoadColumnList(dataTable.Columns);
this.LoadAttributeIndices(dataTable.Indices);
using (var cursor = database.OpenCursor(ADConstants.DataTableName))
{
this.LoadClassList(cursor);
this.LoadAttributeProperties(cursor);
this.LoadPrefixMap(cursor);
}
// TODO: Load Ext-Int Map from hiddentable
}
public LinkResolver(IsamDatabase database, DirectorySchema schema)
{
this.schema = schema;
this.cursor = database.OpenCursor(ADConstants.LinkTableName);
if (this.cursor.TableDefinition.Indices.Contains(linkIndex2008))
{
this.cursor.SetCurrentIndex(linkIndex2008);
}
else
{
// Fallback to the old index if the newer one does not exist
cursor.SetCurrentIndex(linkIndex2003);
}
// TODO: Load column ids instead of names
}
/// <summary>
/// Creates a <see cref="ColumnDefinition"/> object representing the column passed in by <paramref name="columnList"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="columnList">The <see cref="JET_COLUMNLIST"/> object that represents the row in
/// the temptable for this particular column.</param>
/// <returns>
/// A <see cref="ColumnDefinition"/> object based on the current row in the temptable
/// represented by <paramref name="columnList"/>.
/// </returns>
internal static ColumnDefinition Load(IsamDatabase database, string tableName, JET_COLUMNLIST columnList)
{
lock (database.IsamSession)
{
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
// load info for the column
ColumnDefinition columnDefinition = new ColumnDefinition();
JET_SESID sesid = database.IsamSession.Sesid;
// As of Sep 2015, JetGetColumnInfoW is only called for Win8+. Even though Unicode should have
// worked in Win7, it wasn't reliable until Win8.
Encoding encodingOfTextColumns = EsentVersion.SupportsWindows8Features ? Encoding.Unicode : LibraryHelpers.EncodingASCII;
string columnName = Api.RetrieveColumnAsString(
database.IsamSession.Sesid,
columnList.tableid,
columnList.columnidcolumnname,
encodingOfTextColumns);
JET_COLUMNBASE columnbase;
Api.JetGetColumnInfo(database.IsamSession.Sesid, database.Dbid, tableName, columnName, out columnbase);
columnDefinition.columnid = new Columnid(columnbase);
columnDefinition.name = columnDefinition.columnid.Name;
columnDefinition.type = columnDefinition.columnid.Type;
ColumndefGrbit grbitColumn = (ColumndefGrbit)Api.RetrieveColumnAsUInt32(sesid, columnList.tableid, columnList.columnidgrbit).GetValueOrDefault();
columnDefinition.flags = ColumnFlagsFromGrbits(grbitColumn);
columnDefinition.maxLength = Api.RetrieveColumnAsInt32(sesid, columnList.tableid, columnList.columnidcbMax).GetValueOrDefault();
columnDefinition.IsAscii = columnbase.cp == JET_CP.ASCII;
byte[] defaultValueBytes = Api.RetrieveColumn(sesid, columnList.tableid, columnList.columnidDefault);
Columnid isamColumnid = columnDefinition.columnid;
columnDefinition.defaultValue = Converter.ObjectFromBytes(
isamColumnid.Coltyp,
columnDefinition.IsAscii,
defaultValueBytes);
columnDefinition.ReadOnly = true;
return(columnDefinition);
}
}
}
/// <summary>
/// Loads the specified table specified in the <see cref="JET_OBJECTINFO"/> object.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="objectInfo">The object information.</param>
/// <returns>A <see cref="TableDefinition"/> corresponding to the table specified in <paramref name="objectInfo"/>.</returns>
internal static TableDefinition Load(IsamDatabase database, string tableName, JET_OBJECTINFO objectInfo)
{
lock (database.IsamSession)
{
// save the database
TableDefinition tableDefinition = new TableDefinition();
tableDefinition.database = database;
// load info for the table
tableDefinition.name = tableName;
// create our column and index collections
tableDefinition.columnCollection = new ColumnCollection(database, tableDefinition.name);
tableDefinition.indexCollection = new IndexCollection(database, tableDefinition.name);
return(tableDefinition);
}
}
/// <summary>
/// Loads the specified table specified in the <see cref="JET_OBJECTLIST"/> object.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="objectList">The object list.</param>
/// <returns>A <see cref="TableDefinition"/> corresponding to the table specified in <paramref name="objectList"/>.</returns>
internal static TableDefinition Load(IsamDatabase database, JET_OBJECTLIST objectList)
{
lock (database.IsamSession)
{
// save the database
TableDefinition tableDefinition = new TableDefinition();
tableDefinition.database = database;
// load info for the table
tableDefinition.name = Api.RetrieveColumnAsString(
database.IsamSession.Sesid,
objectList.tableid,
objectList.columnidobjectname);
// create our column and index collections
tableDefinition.columnCollection = new ColumnCollection(database, tableDefinition.name);
tableDefinition.indexCollection = new IndexCollection(database, tableDefinition.name);
return(tableDefinition);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TableEnumerator"/> class.
/// </summary>
/// <param name="database">The database.</param>
internal TableEnumerator(IsamDatabase database)
{
this.database = database;
this.enumerator = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnEnumerator"/> class.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
internal ColumnEnumerator(IsamDatabase database, string tableName)
{
this.database = database;
this.tableName = tableName;
this.enumerator = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="TableCollection"/> class.
/// </summary>
public TableCollection()
{
this.database = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnEnumerator"/> class.
/// </summary>
/// <param name="enumerator">The enumerator.</param>
internal ColumnEnumerator(IDictionaryEnumerator enumerator)
{
this.database = null;
this.enumerator = enumerator;
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnCollection"/> class.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
internal ColumnCollection(IsamDatabase database, string tableName)
{
this.database = database;
this.tableName = tableName;
this.readOnly = true;
}
public SecurityDescriptorRersolver(IsamDatabase database)
{
this.cursor = database.OpenCursor(ADConstants.SecurityDescriptorTableName);
this.cursor.SetCurrentIndex(SdIndex);
}
/// <summary>
/// Initializes a new instance of the <see cref="IndexCollection"/> class.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
internal IndexCollection(IsamDatabase database, string tableName)
{
this.database = database;
this.tableName = tableName;
this.readOnly = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="Cursor"/> class.
/// </summary>
/// <param name="isamSession">The session.</param>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="grbit">The grbit.</param>
internal Cursor(IsamSession isamSession, IsamDatabase database, string tableName, OpenTableGrbit grbit)
{
lock (isamSession)
{
this.isamSession = isamSession;
this.database = database;
this.tableName = tableName;
Api.JetOpenTable(isamSession.Sesid, database.Dbid, tableName, null, 0, grbit, out this.tableid);
this.cleanup = true;
this.record = new ColumnAccessor(this, isamSession, this.tableid, RetrieveColumnGrbit.None);
this.editRecord = new ColumnAccessor(this, isamSession, this.tableid, RetrieveColumnGrbit.RetrieveCopy);
this.indexRecord = new ColumnAccessor(this, isamSession, this.tableid, RetrieveColumnGrbit.RetrieveFromIndex);
this.MoveBeforeFirst();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnCollection"/> class.
/// </summary>
public ColumnCollection()
{
this.database = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="TableEnumerator"/> class.
/// </summary>
/// <param name="database">The database.</param>
internal TableEnumerator(IsamDatabase database)
{
this.database = database;
this.enumerator = null;
}
/// <summary>
/// Creates a <see cref="ColumnDefinition"/> object representing the column passed in by <paramref name="columnBase"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="columnBase">The <see cref="JET_COLUMNBASE"/> object that represents this particular column.</param>
/// <returns>
/// A <see cref="ColumnDefinition"/> object based on the <paramref name="columnBase"/> object.
/// </returns>
internal static ColumnDefinition Load(IsamDatabase database, string tableName, JET_COLUMNBASE columnBase)
{
lock (database.IsamSession)
{
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
JET_SESID sesid = database.IsamSession.Sesid;
// load info for the column
ColumnDefinition columnDefinition = new ColumnDefinition();
columnDefinition.columnid = new Columnid(columnBase);
columnDefinition.name = columnDefinition.columnid.Name;
columnDefinition.type = columnDefinition.columnid.Type;
columnDefinition.flags = ColumnFlagsFromGrbits(columnBase.grbit);
columnDefinition.maxLength = (int)columnBase.cbMax;
columnDefinition.IsAscii = columnBase.cp == JET_CP.ASCII;
// there is currently no efficient means to retrieve the
// default value of a specific column from JET. so, we are
// going to reach into the catalog and fetch it directly
JET_TABLEID tableidCatalog;
Api.JetOpenTable(
sesid,
database.Dbid,
"MSysObjects",
null,
0,
OpenTableGrbit.ReadOnly,
out tableidCatalog);
Api.JetSetCurrentIndex(sesid, tableidCatalog, "RootObjects");
Api.MakeKey(sesid, tableidCatalog, true, MakeKeyGrbit.NewKey);
Api.MakeKey(
sesid,
tableidCatalog,
Converter.BytesFromObject(JET_coltyp.Text, true, columnBase.szBaseTableName),
MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
JET_COLUMNBASE columnbaseCatalog;
Api.JetGetTableColumnInfo(sesid, tableidCatalog, "ObjidTable", out columnbaseCatalog);
uint objidTable = Api.RetrieveColumnAsUInt32(sesid, tableidCatalog, columnbaseCatalog.columnid).GetValueOrDefault();
Api.JetSetCurrentIndex(sesid, tableidCatalog, "Name");
Api.MakeKey(sesid, tableidCatalog, objidTable, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, (short)2, MakeKeyGrbit.None);
Api.MakeKey(sesid, tableidCatalog, columnBase.szBaseColumnName, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
Api.JetGetTableColumnInfo(sesid, tableidCatalog, "DefaultValue", out columnbaseCatalog);
byte[] defaultValueBytes = Api.RetrieveColumn(sesid, tableidCatalog, columnbaseCatalog.columnid);
Columnid isamColumnid = columnDefinition.columnid;
columnDefinition.defaultValue = Converter.ObjectFromBytes(
isamColumnid.Coltyp,
columnDefinition.IsAscii,
defaultValueBytes);
columnDefinition.ReadOnly = true;
return(columnDefinition);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="IndexCollection"/> class.
/// </summary>
public IndexCollection()
{
this.database = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="TableCollection"/> class.
/// </summary>
public TableCollection()
{
this.database = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="TableCollection"/> class.
/// </summary>
/// <param name="database">The database.</param>
internal TableCollection(IsamDatabase database)
{
this.database = database;
this.readOnly = true;
}
/// <summary>
/// Creates an <see cref="IndexDefinition"/> object from the specified <paramref name="indexList"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="indexList">The index list.</param>
/// <returns>An <see cref="IndexDefinition"/> object represting the specified index.</returns>
internal static IndexDefinition Load(IsamDatabase database, string tableName, JET_INDEXLIST indexList)
{
lock (database.IsamSession)
{
JET_SESID sesid = database.IsamSession.Sesid;
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
// load info for the index
IndexDefinition indexDefinition = new IndexDefinition();
indexDefinition.name = Api.RetrieveColumnAsString(
sesid,
indexList.tableid,
indexList.columnidindexname);
CreateIndexGrbit grbitIndex = (CreateIndexGrbit)Api.RetrieveColumnAsUInt32(sesid, indexList.tableid, indexList.columnidgrbitIndex);
indexDefinition.flags = IndexFlagsFromGrbits(grbitIndex);
Api.JetGetIndexInfo(
sesid,
database.Dbid,
tableName,
indexDefinition.name,
out indexDefinition.density,
JET_IdxInfo.SpaceAlloc);
int lcid;
Api.JetGetIndexInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
indexDefinition.name,
out lcid,
JET_IdxInfo.LCID);
indexDefinition.cultureInfo = new CultureInfo(lcid);
indexDefinition.compareOptions =
Conversions.CompareOptionsFromLCMapFlags(
Api.RetrieveColumnAsUInt32(
database.IsamSession.Sesid,
indexList.tableid,
indexList.columnidLCMapFlags).GetValueOrDefault());
// CONSIDER: move this workaround into Isam.Interop
try
{
ushort maxKeyLength;
Api.JetGetIndexInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
indexDefinition.name,
out maxKeyLength,
JET_IdxInfo.KeyMost);
indexDefinition.maxKeyLength = maxKeyLength;
}
catch (EsentInvalidParameterException)
{
indexDefinition.maxKeyLength = 255;
}
catch (EsentColumnNotFoundException)
{
indexDefinition.maxKeyLength = 255;
}
// load info for each key column in the index
int currentColumn = 0;
int totalNumberColumns = Api.RetrieveColumnAsInt32(sesid, indexList.tableid, indexList.columnidcColumn).GetValueOrDefault();
indexDefinition.keyColumnCollection = new KeyColumnCollection();
do
{
// load info for this key column
IndexKeyGrbit grbitColumn = (IndexKeyGrbit)Api.RetrieveColumnAsUInt32(sesid, indexList.tableid, indexList.columnidgrbitColumn);
bool isAscending = (grbitColumn & IndexKeyGrbit.Descending) == 0;
string columnName = Api.RetrieveColumnAsString(
sesid,
indexList.tableid,
indexList.columnidcolumnname);
JET_COLUMNBASE columnbase;
Api.JetGetColumnInfo(sesid, database.Dbid, tableName, columnName, out columnbase);
indexDefinition.keyColumnCollection.Add(new KeyColumn(new Columnid(columnbase), isAscending));
// move onto the next key column definition, unless it is
// the last key column
if (currentColumn != totalNumberColumns - 1)
{
Api.TryMoveNext(sesid, indexList.tableid);
}
}while (++currentColumn < totalNumberColumns);
indexDefinition.keyColumnCollection.ReadOnly = true;
// Vista: There is currently no efficient means to retrieve the
// conditional columns for an index from JET. so, we are
// going to reach into the catalog and fetch them directly.
//
// FUTURE: Windows 7 introduced Windows7IdxInfo.CreateIndex and Windows7IdxInfo.CreateIndex2 (and
// Win8 has Windows8IdxInfo.CreateIndex3). Consider retrieving the conditional columns with that
// API and converting the results. But that does not solve the problem for Vista.
indexDefinition.conditionalColumnCollection = new ConditionalColumnCollection();
JET_TABLEID tableidCatalog;
Api.JetOpenTable(
database.IsamSession.Sesid,
database.Dbid,
"MSysObjects",
null,
0,
OpenTableGrbit.ReadOnly,
out tableidCatalog);
Api.JetSetCurrentIndex(sesid, tableidCatalog, "RootObjects");
Api.MakeKey(sesid, tableidCatalog, true, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, tableName, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
JET_COLUMNID columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "ObjidTable");
int objidTable = Api.RetrieveColumnAsInt32(sesid, tableidCatalog, columnidTemp).GetValueOrDefault();
Api.JetSetCurrentIndex(sesid, tableidCatalog, "Name");
Api.MakeKey(sesid, tableidCatalog, objidTable, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, (short)3, MakeKeyGrbit.None);
Api.MakeKey(sesid, tableidCatalog, indexDefinition.name, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "Flags");
int indexFlagsBytes = Api.RetrieveColumnAsInt32(sesid, tableidCatalog, columnidTemp).GetValueOrDefault();
columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "ConditionalColumns");
byte[] conditionalColumnsBytes = Api.RetrieveColumn(sesid, tableidCatalog, columnidTemp);
for (int ib = 0; conditionalColumnsBytes != null && ib < conditionalColumnsBytes.Length; ib += 4)
{
uint colid;
bool mustBeNull;
JET_COLUMNBASE columnBase;
// fIDXExtendedColumns
if ((indexFlagsBytes & 0xffff0000) == 0x00010000)
{
// fIDXSEGTemplateColumn
if ((conditionalColumnsBytes[ib + 0] & 0x80) != 0)
{
// fCOLUMNIDTemplate
colid = 0x80000000 | (uint)(conditionalColumnsBytes[ib + 3] << 8) | (uint)conditionalColumnsBytes[ib + 2];
}
else
{
colid = (uint)(conditionalColumnsBytes[ib + 3] << 8) | (uint)conditionalColumnsBytes[ib + 2];
}
// fIDXSEGMustBeNull
if ((conditionalColumnsBytes[ib + 0] & 0x20) != 0)
{
mustBeNull = true;
}
else
{
mustBeNull = false;
}
}
else
{
// do not load conditional columns from an unknown format
continue;
}
JET_COLUMNID castedColid = JET_COLUMNID.CreateColumnidFromNativeValue(unchecked ((int)colid));
VistaApi.JetGetColumnInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
castedColid,
out columnBase);
indexDefinition.conditionalColumnCollection.Add(new ConditionalColumn(new Columnid(columnBase), mustBeNull));
}
indexDefinition.conditionalColumnCollection.ReadOnly = true;
indexDefinition.ReadOnly = true;
return(indexDefinition);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnCollection"/> class.
/// </summary>
public ColumnCollection()
{
this.database = null;
}
protected virtual void Dispose(bool disposing)
{
if (!disposing)
{
// Do nothing
return;
}
if(this.LinkResolver != null)
{
this.LinkResolver.Dispose();
this.LinkResolver = null;
}
if (this.SecurityDescriptorRersolver != null)
{
this.SecurityDescriptorRersolver.Dispose();
this.SecurityDescriptorRersolver = null;
}
if (this.DistinguishedNameResolver != null)
{
this.DistinguishedNameResolver.Dispose();
this.DistinguishedNameResolver = null;
}
if (this.DomainController != null)
{
this.DomainController.Dispose();
this.DomainController = null;
}
if (this.database != null)
{
this.database.Dispose();
this.database = null;
}
if (this.session != null)
{
if (this.attachedDatabasePath != null)
{
this.session.DetachDatabase(this.attachedDatabasePath);
this.attachedDatabasePath = null;
}
this.session.Dispose();
this.session = null;
}
if (this.instance != null)
{
this.instance.Dispose();
this.instance = null;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnEnumerator"/> class.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
internal ColumnEnumerator(IsamDatabase database, string tableName)
{
this.database = database;
this.tableName = tableName;
this.enumerator = null;
}
public DistinguishedNameResolver(IsamDatabase database, DirectorySchema schema)
{
this.dnCache = new Dictionary<int, string>();
this.schema = schema;
this.cursor = database.OpenCursor(ADConstants.DataTableName);
}
/// <summary>
/// Creates a single table with the specified definition in the database
/// </summary>
/// <param name="tableDefinition">The table definition.</param>
public override void CreateTable(TableDefinition tableDefinition)
{
lock (this.IsamSession)
{
this.CheckDisposed();
using (IsamTransaction trx = new IsamTransaction(this.IsamSession))
{
// FUTURE-2013/11/15-martinc: Consider using JetCreateTableColumnIndex(). It would be
// a bit faster because it's only a single managed/native transition.
// Hard-code the initial space and density.
JET_TABLEID tableid;
Api.JetCreateTable(this.IsamSession.Sesid, this.dbid, tableDefinition.Name, 16, 90, out tableid);
foreach (ColumnDefinition columnDefinition in tableDefinition.Columns)
{
JET_COLUMNDEF columndef = new JET_COLUMNDEF();
columndef.coltyp = IsamDatabase.ColtypFromColumnDefinition(columnDefinition);
columndef.cp = JET_CP.Unicode;
columndef.cbMax = columnDefinition.MaxLength;
columndef.grbit = Converter.ColumndefGrbitFromColumnFlags(columnDefinition.Flags);
byte[] defaultValueBytes = Converter.BytesFromObject(
columndef.coltyp,
false /*ASCII */,
columnDefinition.DefaultValue);
JET_COLUMNID columnid;
int defaultValueLength = (defaultValueBytes == null) ? 0 : defaultValueBytes.Length;
Api.JetAddColumn(
this.IsamSession.Sesid,
tableid,
columnDefinition.Name,
columndef,
defaultValueBytes,
defaultValueLength,
out columnid);
}
foreach (IndexDefinition indexDefinition in tableDefinition.Indices)
{
JET_INDEXCREATE[] indexcreates = new JET_INDEXCREATE[1];
indexcreates[0] = new JET_INDEXCREATE();
indexcreates[0].szIndexName = indexDefinition.Name;
indexcreates[0].szKey = IsamDatabase.IndexKeyFromIndexDefinition(indexDefinition);
indexcreates[0].cbKey = indexcreates[0].szKey.Length;
indexcreates[0].grbit = IsamDatabase.GrbitFromIndexDefinition(indexDefinition);
indexcreates[0].ulDensity = indexDefinition.Density;
indexcreates[0].pidxUnicode = new JET_UNICODEINDEX();
indexcreates[0].pidxUnicode.lcid = indexDefinition.CultureInfo.LCID;
indexcreates[0].pidxUnicode.dwMapFlags = (uint)Converter.UnicodeFlagsFromCompareOptions(indexDefinition.CompareOptions);
indexcreates[0].rgconditionalcolumn = IsamDatabase.ConditionalColumnsFromIndexDefinition(indexDefinition);
indexcreates[0].cConditionalColumn = indexcreates[0].rgconditionalcolumn.Length;
indexcreates[0].cbKeyMost = indexDefinition.MaxKeyLength;
Api.JetCreateIndex2(this.IsamSession.Sesid, tableid, indexcreates, indexcreates.Length);
}
// The initially-created tableid is opened exclusively.
Api.JetCloseTable(this.IsamSession.Sesid, tableid);
trx.Commit();
DatabaseCommon.SchemaUpdateID++;
}
}
}
/// <summary>
/// Creates a <see cref="ColumnDefinition"/> object representing the column passed in by <paramref name="columnList"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="columnList">The <see cref="JET_COLUMNLIST"/> object that represents the row in
/// the temptable for this particular column.</param>
/// <returns>
/// A <see cref="ColumnDefinition"/> object based on the current row in the temptable
/// represented by <paramref name="columnList"/>.
/// </returns>
internal static ColumnDefinition Load(IsamDatabase database, string tableName, JET_COLUMNLIST columnList)
{
lock (database.IsamSession)
{
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
// load info for the column
ColumnDefinition columnDefinition = new ColumnDefinition();
JET_SESID sesid = database.IsamSession.Sesid;
// If we use the wide API (Vista+), then the temp table will be in UTF-16.
// Technically, this should have worked in Vista. But there was a bug, and
// it was fixed after Windows 7.
Encoding encodingOfTextColumns = EsentVersion.SupportsWindows8Features
? Encoding.Unicode
: Encoding.ASCII;
string columnName = Api.RetrieveColumnAsString(
database.IsamSession.Sesid,
columnList.tableid,
columnList.columnidcolumnname,
encodingOfTextColumns);
JET_COLUMNBASE columnbase;
Api.JetGetColumnInfo(database.IsamSession.Sesid, database.Dbid, tableName, columnName, out columnbase);
columnDefinition.columnid = new Columnid(columnbase);
columnDefinition.name = columnDefinition.columnid.Name;
columnDefinition.type = columnDefinition.columnid.Type;
ColumndefGrbit grbitColumn = (ColumndefGrbit)Api.RetrieveColumnAsUInt32(sesid, columnList.tableid, columnList.columnidgrbit).GetValueOrDefault();
columnDefinition.flags = ColumnFlagsFromGrbits(grbitColumn);
columnDefinition.maxLength = Api.RetrieveColumnAsInt32(sesid, columnList.tableid, columnList.columnidcbMax).GetValueOrDefault();
columnDefinition.IsAscii = columnbase.cp == JET_CP.ASCII;
byte[] defaultValueBytes = Api.RetrieveColumn(sesid, columnList.tableid, columnList.columnidDefault);
Columnid isamColumnid = columnDefinition.columnid;
columnDefinition.defaultValue = Converter.ObjectFromBytes(
isamColumnid.Coltyp,
columnDefinition.IsAscii,
defaultValueBytes);
columnDefinition.ReadOnly = true;
return columnDefinition;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TableCollection"/> class.
/// </summary>
/// <param name="database">The database.</param>
internal TableCollection(IsamDatabase database)
{
this.database = database;
this.readOnly = true;
}
/// <summary>
/// Creates a <see cref="ColumnDefinition"/> object representing the column passed in by <paramref name="columnBase"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="columnBase">The <see cref="JET_COLUMNBASE"/> object that represents this particular column.</param>
/// <returns>
/// A <see cref="ColumnDefinition"/> object based on the <paramref name="columnBase"/> object.
/// </returns>
internal static ColumnDefinition Load(IsamDatabase database, string tableName, JET_COLUMNBASE columnBase)
{
lock (database.IsamSession)
{
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
JET_SESID sesid = database.IsamSession.Sesid;
// load info for the column
ColumnDefinition columnDefinition = new ColumnDefinition();
columnDefinition.columnid = new Columnid(columnBase);
columnDefinition.name = columnDefinition.columnid.Name;
columnDefinition.type = columnDefinition.columnid.Type;
columnDefinition.flags = ColumnFlagsFromGrbits(columnBase.grbit);
columnDefinition.maxLength = (int)columnBase.cbMax;
columnDefinition.IsAscii = columnBase.cp == JET_CP.ASCII;
// there is currently no efficient means to retrieve the
// default value of a specific column from JET. so, we are
// going to reach into the catalog and fetch it directly
JET_TABLEID tableidCatalog;
Api.JetOpenTable(
sesid,
database.Dbid,
"MSysObjects",
null,
0,
OpenTableGrbit.ReadOnly,
out tableidCatalog);
Api.JetSetCurrentIndex(sesid, tableidCatalog, "RootObjects");
Api.MakeKey(sesid, tableidCatalog, true, MakeKeyGrbit.NewKey);
Api.MakeKey(
sesid,
tableidCatalog,
Converter.BytesFromObject(JET_coltyp.Text, true, columnBase.szBaseTableName),
MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
JET_COLUMNBASE columnbaseCatalog;
Api.JetGetTableColumnInfo(sesid, tableidCatalog, "ObjidTable", out columnbaseCatalog);
uint objidTable = Api.RetrieveColumnAsUInt32(sesid, tableidCatalog, columnbaseCatalog.columnid).GetValueOrDefault();
Api.JetSetCurrentIndex(sesid, tableidCatalog, "Name");
Api.MakeKey(sesid, tableidCatalog, objidTable, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, (short)2, MakeKeyGrbit.None);
Api.MakeKey(sesid, tableidCatalog, columnBase.szBaseColumnName, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
Api.JetGetTableColumnInfo(sesid, tableidCatalog, "DefaultValue", out columnbaseCatalog);
byte[] defaultValueBytes = Api.RetrieveColumn(sesid, tableidCatalog, columnbaseCatalog.columnid);
Columnid isamColumnid = columnDefinition.columnid;
columnDefinition.defaultValue = Converter.ObjectFromBytes(
isamColumnid.Coltyp,
columnDefinition.IsAscii,
defaultValueBytes);
columnDefinition.ReadOnly = true;
return columnDefinition;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ColumnEnumerator"/> class.
/// </summary>
/// <param name="enumerator">The enumerator.</param>
internal ColumnEnumerator(IDictionaryEnumerator enumerator)
{
this.database = null;
this.enumerator = enumerator;
}
/// <summary>
/// Creates an <see cref="IndexDefinition"/> object from the specified <paramref name="indexList"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="indexList">The index list.</param>
/// <returns>An <see cref="IndexDefinition"/> object represting the specified index.</returns>
internal static IndexDefinition Load(IsamDatabase database, string tableName, JET_INDEXLIST indexList)
{
lock (database.IsamSession)
{
JET_SESID sesid = database.IsamSession.Sesid;
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
// load info for the index
IndexDefinition indexDefinition = new IndexDefinition();
indexDefinition.name = Api.RetrieveColumnAsString(
sesid,
indexList.tableid,
indexList.columnidindexname);
CreateIndexGrbit grbitIndex = (CreateIndexGrbit)Api.RetrieveColumnAsUInt32(sesid, indexList.tableid, indexList.columnidgrbitIndex);
indexDefinition.flags = IndexFlagsFromGrbits(grbitIndex);
Api.JetGetIndexInfo(
sesid,
database.Dbid,
tableName,
indexDefinition.name,
out indexDefinition.density,
JET_IdxInfo.SpaceAlloc);
int lcid;
Api.JetGetIndexInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
indexDefinition.name,
out lcid,
JET_IdxInfo.LCID);
indexDefinition.cultureInfo = new CultureInfo(lcid);
indexDefinition.compareOptions =
Conversions.CompareOptionsFromLCMapFlags(
Api.RetrieveColumnAsUInt32(
database.IsamSession.Sesid,
indexList.tableid,
indexList.columnidLCMapFlags).GetValueOrDefault());
// CONSIDER: move this workaround into Isam.Interop
try
{
ushort maxKeyLength;
Api.JetGetIndexInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
indexDefinition.name,
out maxKeyLength,
JET_IdxInfo.KeyMost);
indexDefinition.maxKeyLength = maxKeyLength;
}
catch (EsentInvalidParameterException)
{
indexDefinition.maxKeyLength = 255;
}
catch (EsentColumnNotFoundException)
{
indexDefinition.maxKeyLength = 255;
}
// load info for each key column in the index
int currentColumn = 0;
int totalNumberColumns = Api.RetrieveColumnAsInt32(sesid, indexList.tableid, indexList.columnidcColumn).GetValueOrDefault();
indexDefinition.keyColumnCollection = new KeyColumnCollection();
do
{
// load info for this key column
IndexKeyGrbit grbitColumn = (IndexKeyGrbit)Api.RetrieveColumnAsUInt32(sesid, indexList.tableid, indexList.columnidgrbitColumn);
bool isAscending = (grbitColumn & IndexKeyGrbit.Descending) == 0;
string columnName = Api.RetrieveColumnAsString(
sesid,
indexList.tableid,
indexList.columnidcolumnname);
JET_COLUMNBASE columnbase;
Api.JetGetColumnInfo(sesid, database.Dbid, tableName, columnName, out columnbase);
indexDefinition.keyColumnCollection.Add(new KeyColumn(new Columnid(columnbase), isAscending));
// move onto the next key column definition, unless it is
// the last key column
if (currentColumn != totalNumberColumns - 1)
{
Api.TryMoveNext(sesid, indexList.tableid);
}
}
while (++currentColumn < totalNumberColumns);
indexDefinition.keyColumnCollection.ReadOnly = true;
// Vista: There is currently no efficient means to retrieve the
// conditional columns for an index from JET. so, we are
// going to reach into the catalog and fetch them directly.
//
// FUTURE: Windows 7 introduced Windows7IdxInfo.CreateIndex and Windows7IdxInfo.CreateIndex2 (and
// Win8 has Windows8IdxInfo.CreateIndex3). Consider retrieving the conditional columns with that
// API and converting the results. But that does not solve the problem for Vista.
indexDefinition.conditionalColumnCollection = new ConditionalColumnCollection();
JET_TABLEID tableidCatalog;
Api.JetOpenTable(
database.IsamSession.Sesid,
database.Dbid,
"MSysObjects",
null,
0,
OpenTableGrbit.ReadOnly,
out tableidCatalog);
Api.JetSetCurrentIndex(sesid, tableidCatalog, "RootObjects");
Api.MakeKey(sesid, tableidCatalog, true, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, tableName, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
JET_COLUMNID columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "ObjidTable");
int objidTable = Api.RetrieveColumnAsInt32(sesid, tableidCatalog, columnidTemp).GetValueOrDefault();
Api.JetSetCurrentIndex(sesid, tableidCatalog, "Name");
Api.MakeKey(sesid, tableidCatalog, objidTable, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, (short)3, MakeKeyGrbit.None);
Api.MakeKey(sesid, tableidCatalog, indexDefinition.name, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "Flags");
int indexFlagsBytes = Api.RetrieveColumnAsInt32(sesid, tableidCatalog, columnidTemp).GetValueOrDefault();
columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "ConditionalColumns");
byte[] conditionalColumnsBytes = Api.RetrieveColumn(sesid, tableidCatalog, columnidTemp);
for (int ib = 0; conditionalColumnsBytes != null && ib < conditionalColumnsBytes.Length; ib += 4)
{
uint colid;
bool mustBeNull;
JET_COLUMNBASE columnBase;
// fIDXExtendedColumns
if ((indexFlagsBytes & 0xffff0000) == 0x00010000)
{
// fIDXSEGTemplateColumn
if ((conditionalColumnsBytes[ib + 0] & 0x80) != 0)
{
// fCOLUMNIDTemplate
colid = 0x80000000 | (uint)(conditionalColumnsBytes[ib + 3] << 8) | (uint)conditionalColumnsBytes[ib + 2];
}
else
{
colid = (uint)(conditionalColumnsBytes[ib + 3] << 8) | (uint)conditionalColumnsBytes[ib + 2];
}
// fIDXSEGMustBeNull
if ((conditionalColumnsBytes[ib + 0] & 0x20) != 0)
{
mustBeNull = true;
}
else
{
mustBeNull = false;
}
}
else
{
// do not load conditional columns from an unknown format
continue;
}
JET_COLUMNID castedColid = JET_COLUMNID.CreateColumnidFromNativeValue(unchecked((int)colid));
VistaApi.JetGetColumnInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
castedColid,
out columnBase);
indexDefinition.conditionalColumnCollection.Add(new ConditionalColumn(new Columnid(columnBase), mustBeNull));
}
indexDefinition.conditionalColumnCollection.ReadOnly = true;
indexDefinition.ReadOnly = true;
return indexDefinition;
}
}
}
