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Overview
| Comment: | Improve use of object hash codes by the SQLiteModuleEnumerable class. Clarify via comments that methods of the SQLiteNativeModule class are exempt from using CheckDisposed. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
5a605c351d50d0e13f414146cf579335 |
| User & Date: | mistachkin 2014-02-05 20:26:50 |
Context
|
2014-02-05
| ||
| 21:00 | Add more tests. check-in: dc9d065888 user: mistachkin tags: trunk | |
| 20:26 | Improve use of object hash codes by the SQLiteModuleEnumerable class. Clarify via comments that methods of the SQLiteNativeModule class are exempt from using CheckDisposed. check-in: 5a605c351d user: mistachkin tags: trunk | |
| 01:46 | Update table-of-contents topic names. check-in: 837439ff91 user: mistachkin tags: trunk | |
Changes
Changes to System.Data.SQLite/SQLiteModule.cs.
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* Written by Joe Mistachkin (joe@mistachkin.com)
*
* Released to the public domain, use at your own risk!
********************************************************/
using System.Collections.Generic;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Text;
namespace System.Data.SQLite
{
#region SQLiteContext Helper Class
/// <summary>
................................................................................
#if !PLATFORM_COMPACTFRAMEWORK
Marshal.WriteIntPtr(pointer, offset, value);
#else
Marshal.WriteIntPtr(IntPtrForOffset(pointer, offset), value);
#endif
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteModule Base Class
/// <summary>
................................................................................
IntPtr pAux,
int argc,
IntPtr argv,
ref IntPtr pVtab,
ref IntPtr pError
)
{
// CheckDisposed();
if (module == null)
{
pError = SQLiteString.Utf8IntPtrFromString(
ModuleNotAvailableErrorMessage);
return SQLiteErrorCode.Error;
................................................................................
IntPtr pAux,
int argc,
IntPtr argv,
ref IntPtr pVtab,
ref IntPtr pError
)
{
// CheckDisposed();
if (module == null)
{
pError = SQLiteString.Utf8IntPtrFromString(
ModuleNotAvailableErrorMessage);
return SQLiteErrorCode.Error;
................................................................................
/// See the <see cref="ISQLiteNativeModule.xBestIndex" /> method.
/// </returns>
public SQLiteErrorCode xBestIndex(
IntPtr pVtab,
IntPtr pIndex
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xBestIndex(pVtab, pIndex);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xDisconnect" /> method.
/// </returns>
public SQLiteErrorCode xDisconnect(
IntPtr pVtab
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xDisconnect(pVtab);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xDestroy" /> method.
/// </returns>
public SQLiteErrorCode xDestroy(
IntPtr pVtab
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xDestroy(pVtab);
}
................................................................................
/// See the <see cref="ISQLiteNativeModule.xOpen" /> method.
/// </returns>
public SQLiteErrorCode xOpen(
IntPtr pVtab,
ref IntPtr pCursor
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xOpen(pVtab, ref pCursor);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xClose" /> method.
/// </returns>
public SQLiteErrorCode xClose(
IntPtr pCursor
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableCursorError(pCursor);
return module.xClose(pCursor);
}
................................................................................
IntPtr pCursor,
int idxNum,
IntPtr idxStr,
int argc,
IntPtr argv
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableCursorError(pCursor);
return module.xFilter(pCursor, idxNum, idxStr, argc, argv);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xNext" /> method.
/// </returns>
public SQLiteErrorCode xNext(
IntPtr pCursor
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableCursorError(pCursor);
return module.xNext(pCursor);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xEof" /> method.
/// </returns>
public int xEof(
IntPtr pCursor
)
{
// CheckDisposed();
if (module == null)
{
ModuleNotAvailableCursorError(pCursor);
return 1;
}
................................................................................
/// </returns>
public SQLiteErrorCode xColumn(
IntPtr pCursor,
IntPtr pContext,
int index
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableCursorError(pCursor);
return module.xColumn(pCursor, pContext, index);
}
................................................................................
/// See the <see cref="ISQLiteNativeModule.xRowId" /> method.
/// </returns>
public SQLiteErrorCode xRowId(
IntPtr pCursor,
ref long rowId
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableCursorError(pCursor);
return module.xRowId(pCursor, ref rowId);
}
................................................................................
public SQLiteErrorCode xUpdate(
IntPtr pVtab,
int argc,
IntPtr argv,
ref long rowId
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xUpdate(pVtab, argc, argv, ref rowId);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xBegin" /> method.
/// </returns>
public SQLiteErrorCode xBegin(
IntPtr pVtab
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xBegin(pVtab);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xSync" /> method.
/// </returns>
public SQLiteErrorCode xSync(
IntPtr pVtab
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xSync(pVtab);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xCommit" /> method.
/// </returns>
public SQLiteErrorCode xCommit(
IntPtr pVtab
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xCommit(pVtab);
}
................................................................................
/// <returns>
/// See the <see cref="ISQLiteNativeModule.xRollback" /> method.
/// </returns>
public SQLiteErrorCode xRollback(
IntPtr pVtab
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xRollback(pVtab);
}
................................................................................
IntPtr pVtab,
int nArg,
IntPtr zName,
ref SQLiteCallback callback,
ref IntPtr pClientData
)
{
// CheckDisposed();
if (module == null)
{
ModuleNotAvailableTableError(pVtab);
return 0;
}
................................................................................
/// See the <see cref="ISQLiteNativeModule.xRename" /> method.
/// </returns>
public SQLiteErrorCode xRename(
IntPtr pVtab,
IntPtr zNew
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xRename(pVtab, zNew);
}
................................................................................
/// See the <see cref="ISQLiteNativeModule.xSavepoint" /> method.
/// </returns>
public SQLiteErrorCode xSavepoint(
IntPtr pVtab,
int iSavepoint
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xSavepoint(pVtab, iSavepoint);
}
................................................................................
/// See the <see cref="ISQLiteNativeModule.xRelease" /> method.
/// </returns>
public SQLiteErrorCode xRelease(
IntPtr pVtab,
int iSavepoint
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xRelease(pVtab, iSavepoint);
}
................................................................................
/// See the <see cref="ISQLiteNativeModule.xRollbackTo" /> method.
/// </returns>
public SQLiteErrorCode xRollbackTo(
IntPtr pVtab,
int iSavepoint
)
{
// CheckDisposed();
if (module == null)
return ModuleNotAvailableTableError(pVtab);
return module.xRollbackTo(pVtab, iSavepoint);
}
#endregion
|
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* Written by Joe Mistachkin (joe@mistachkin.com) * * Released to the public domain, use at your own risk! ********************************************************/ using System.Collections.Generic; using System.Globalization; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Text; namespace System.Data.SQLite { #region SQLiteContext Helper Class /// <summary> ................................................................................ #if !PLATFORM_COMPACTFRAMEWORK Marshal.WriteIntPtr(pointer, offset, value); #else Marshal.WriteIntPtr(IntPtrForOffset(pointer, offset), value); #endif } #endregion /////////////////////////////////////////////////////////////////////// #region Object Helper Methods /// <summary> /// Generates a hash code value for the object. /// </summary> /// <param name="value"> /// The object instance used to calculate the hash code. /// </param> /// <param name="identity"> /// Non-zero if different object instances with the same value should /// generate different hash codes, where applicable. This parameter /// has no effect on the .NET Compact Framework. /// </param> /// <returns> /// The hash code value -OR- zero if the object is null. /// </returns> public static int GetHashCode( object value, bool identity ) { #if !PLATFORM_COMPACTFRAMEWORK if (identity) return RuntimeHelpers.GetHashCode(value); #endif if (value == null) return 0; return value.GetHashCode(); } #endregion } #endregion /////////////////////////////////////////////////////////////////////////// #region SQLiteModule Base Class /// <summary> ................................................................................ IntPtr pAux, int argc, IntPtr argv, ref IntPtr pVtab, ref IntPtr pError ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) { pError = SQLiteString.Utf8IntPtrFromString( ModuleNotAvailableErrorMessage); return SQLiteErrorCode.Error; ................................................................................ IntPtr pAux, int argc, IntPtr argv, ref IntPtr pVtab, ref IntPtr pError ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) { pError = SQLiteString.Utf8IntPtrFromString( ModuleNotAvailableErrorMessage); return SQLiteErrorCode.Error; ................................................................................ /// See the <see cref="ISQLiteNativeModule.xBestIndex" /> method. /// </returns> public SQLiteErrorCode xBestIndex( IntPtr pVtab, IntPtr pIndex ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xBestIndex(pVtab, pIndex); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xDisconnect" /> method. /// </returns> public SQLiteErrorCode xDisconnect( IntPtr pVtab ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xDisconnect(pVtab); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xDestroy" /> method. /// </returns> public SQLiteErrorCode xDestroy( IntPtr pVtab ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xDestroy(pVtab); } ................................................................................ /// See the <see cref="ISQLiteNativeModule.xOpen" /> method. /// </returns> public SQLiteErrorCode xOpen( IntPtr pVtab, ref IntPtr pCursor ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xOpen(pVtab, ref pCursor); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xClose" /> method. /// </returns> public SQLiteErrorCode xClose( IntPtr pCursor ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableCursorError(pCursor); return module.xClose(pCursor); } ................................................................................ IntPtr pCursor, int idxNum, IntPtr idxStr, int argc, IntPtr argv ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableCursorError(pCursor); return module.xFilter(pCursor, idxNum, idxStr, argc, argv); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xNext" /> method. /// </returns> public SQLiteErrorCode xNext( IntPtr pCursor ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableCursorError(pCursor); return module.xNext(pCursor); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xEof" /> method. /// </returns> public int xEof( IntPtr pCursor ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) { ModuleNotAvailableCursorError(pCursor); return 1; } ................................................................................ /// </returns> public SQLiteErrorCode xColumn( IntPtr pCursor, IntPtr pContext, int index ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableCursorError(pCursor); return module.xColumn(pCursor, pContext, index); } ................................................................................ /// See the <see cref="ISQLiteNativeModule.xRowId" /> method. /// </returns> public SQLiteErrorCode xRowId( IntPtr pCursor, ref long rowId ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableCursorError(pCursor); return module.xRowId(pCursor, ref rowId); } ................................................................................ public SQLiteErrorCode xUpdate( IntPtr pVtab, int argc, IntPtr argv, ref long rowId ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xUpdate(pVtab, argc, argv, ref rowId); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xBegin" /> method. /// </returns> public SQLiteErrorCode xBegin( IntPtr pVtab ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xBegin(pVtab); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xSync" /> method. /// </returns> public SQLiteErrorCode xSync( IntPtr pVtab ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xSync(pVtab); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xCommit" /> method. /// </returns> public SQLiteErrorCode xCommit( IntPtr pVtab ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xCommit(pVtab); } ................................................................................ /// <returns> /// See the <see cref="ISQLiteNativeModule.xRollback" /> method. /// </returns> public SQLiteErrorCode xRollback( IntPtr pVtab ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xRollback(pVtab); } ................................................................................ IntPtr pVtab, int nArg, IntPtr zName, ref SQLiteCallback callback, ref IntPtr pClientData ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) { ModuleNotAvailableTableError(pVtab); return 0; } ................................................................................ /// See the <see cref="ISQLiteNativeModule.xRename" /> method. /// </returns> public SQLiteErrorCode xRename( IntPtr pVtab, IntPtr zNew ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xRename(pVtab, zNew); } ................................................................................ /// See the <see cref="ISQLiteNativeModule.xSavepoint" /> method. /// </returns> public SQLiteErrorCode xSavepoint( IntPtr pVtab, int iSavepoint ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xSavepoint(pVtab, iSavepoint); } ................................................................................ /// See the <see cref="ISQLiteNativeModule.xRelease" /> method. /// </returns> public SQLiteErrorCode xRelease( IntPtr pVtab, int iSavepoint ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xRelease(pVtab, iSavepoint); } ................................................................................ /// See the <see cref="ISQLiteNativeModule.xRollbackTo" /> method. /// </returns> public SQLiteErrorCode xRollbackTo( IntPtr pVtab, int iSavepoint ) { // // NOTE: Called by native code. // // CheckDisposed(); /* EXEMPT */ if (module == null) return ModuleNotAvailableTableError(pVtab); return module.xRollbackTo(pVtab, iSavepoint); } #endregion |
Changes to System.Data.SQLite/SQLiteModuleEnumerable.cs.
312 313 314 315 316 317 318 319 320 321 322 323 324 325 ... 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 ... 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 |
#region Private Data
/// <summary>
/// The <see cref="IEnumerable" /> instance containing the backing data
/// for the virtual table.
/// </summary>
private IEnumerable enumerable;
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Constructors
/// <summary>
/// Constructs an instance of this class.
................................................................................
/// The <see cref="IEnumerable" /> instance to expose as a virtual
/// table. This parameter cannot be null.
/// </param>
public SQLiteModuleEnumerable(
string name,
IEnumerable enumerable
)
: base(name)
{
if (enumerable == null)
throw new ArgumentNullException("enumerable");
this.enumerable = enumerable;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Protected Methods
/// <summary>
................................................................................
/// The unique row identifier or zero upon failure.
/// </returns>
protected virtual long GetRowIdFromObject(
SQLiteVirtualTableCursor cursor,
object value
)
{
if ((cursor != null) && (value != null))
return MakeRowId(cursor.GetRowIndex(), value.GetHashCode());
else if (cursor != null)
return cursor.GetRowIndex();
else if (value != null)
return value.GetHashCode();
else
return 0;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region ISQLiteManagedModule Members
/// <summary>
|
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#region Private Data
/// <summary>
/// The <see cref="IEnumerable" /> instance containing the backing data
/// for the virtual table.
/// </summary>
private IEnumerable enumerable;
///////////////////////////////////////////////////////////////////////
/// <summary>
/// Non-zero if different object instances with the same value should
/// generate different row identifiers, where applicable. This has no
/// effect on the .NET Compact Framework.
/// </summary>
private bool objectIdentity;
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Constructors
/// <summary>
/// Constructs an instance of this class.
................................................................................
/// The <see cref="IEnumerable" /> instance to expose as a virtual
/// table. This parameter cannot be null.
/// </param>
public SQLiteModuleEnumerable(
string name,
IEnumerable enumerable
)
: this(name, enumerable, false)
{
// do nothing.
}
///////////////////////////////////////////////////////////////////////
/// <summary>
/// Constructs an instance of this class.
/// </summary>
/// <param name="name">
/// The name of the module. This parameter cannot be null.
/// </param>
/// <param name="enumerable">
/// The <see cref="IEnumerable" /> instance to expose as a virtual
/// table. This parameter cannot be null.
/// </param>
/// <param name="objectIdentity">
/// Non-zero if different object instances with the same value should
/// generate different row identifiers, where applicable. This
/// parameter has no effect on the .NET Compact Framework.
/// </param>
public SQLiteModuleEnumerable(
string name,
IEnumerable enumerable,
bool objectIdentity
)
: base(name)
{
if (enumerable == null)
throw new ArgumentNullException("enumerable");
this.enumerable = enumerable;
this.objectIdentity = objectIdentity;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Protected Methods
/// <summary>
................................................................................
/// The unique row identifier or zero upon failure.
/// </returns>
protected virtual long GetRowIdFromObject(
SQLiteVirtualTableCursor cursor,
object value
)
{
int rowIndex = (cursor != null) ? cursor.GetRowIndex() : 0;
int hashCode = SQLiteMarshal.GetHashCode(value, objectIdentity);
return MakeRowId(rowIndex, hashCode);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region ISQLiteManagedModule Members
/// <summary>
|