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Overview
| Comment: | Introduce some private abstract base classes to isolate the differences between memory and stream enumeration. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sessions |
| Files: | files | file ages | folders |
| SHA1: |
04332df7d6a86dc03325e020780901bd |
| User & Date: | mistachkin 2017-10-06 17:39:08 |
Context
|
2017-10-06
| ||
| 18:06 | Work on cleaning up the enumerator/iterator classes and P/Invoke integration. check-in: c82ab41db1 user: mistachkin tags: sessions | |
| 17:39 | Introduce some private abstract base classes to isolate the differences between memory and stream enumeration. check-in: 04332df7d6 user: mistachkin tags: sessions | |
| 16:08 | Remove unused IsPatchSet property from the ISQLiteChangeSet interface. check-in: 54ac954062 user: mistachkin tags: sessions | |
Changes
Changes to System.Data.SQLite/SQLiteSessions.cs.
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string tableName
);
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteChangeSetIterator Class
internal sealed class SQLiteChangeSetIterator : IDisposable
{
#region Private Data
private IntPtr pData;
private IntPtr iterator;
#endregion
///////////////////////////////////////////////////////////////////////
#region Private Constructors
private SQLiteChangeSetIterator(
IntPtr pData,
IntPtr iterator
)
{
this.pData = pData;
this.iterator = iterator;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Private Methods
private void CheckHandle()
{
if (iterator == IntPtr.Zero)
throw new InvalidOperationException("iterator is not open");
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Static "Factory" Methods
public static SQLiteChangeSetIterator Create(
byte[] rawData
)
{
if (rawData == null)
throw new ArgumentNullException("rawData");
SQLiteChangeSetIterator result = null;
IntPtr pData = IntPtr.Zero;
IntPtr iterator = IntPtr.Zero;
try
{
int nData = 0;
pData = SQLiteBytes.ToIntPtr(rawData, ref nData);
if (pData == IntPtr.Zero)
throw new SQLiteException(SQLiteErrorCode.NoMem, null);
SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_start(
ref iterator, nData, pData);
if (rc != SQLiteErrorCode.Ok)
throw new SQLiteException(rc, "sqlite3changeset_start");
result = new SQLiteChangeSetIterator(pData, iterator);
}
finally
{
if (result == null)
{
if (iterator != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3changeset_finalize(
iterator);
iterator = IntPtr.Zero;
}
if (pData != IntPtr.Zero)
{
SQLiteMemory.Free(pData);
pData = IntPtr.Zero;
}
}
}
return result;
}
///////////////////////////////////////////////////////////////////////
public static SQLiteChangeSetIterator Create(
Stream stream,
SQLiteConnectionFlags flags
)
{
if (stream == null)
throw new ArgumentNullException("stream");
SQLiteChangeSetIterator result = null;
IntPtr iterator = IntPtr.Zero;
try
{
SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_start_strm(
ref iterator, new SQLiteStreamAdapter(stream, flags).xInput,
IntPtr.Zero);
if (rc != SQLiteErrorCode.Ok)
throw new SQLiteException(rc, "sqlite3changeset_start_strm");
result = new SQLiteChangeSetIterator(IntPtr.Zero, iterator);
}
finally
{
if (result == null)
{
if (iterator != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3changeset_finalize(
iterator);
iterator = IntPtr.Zero;
}
}
}
return result;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Methods
public void Next()
{
................................................................................
typeof(SQLiteChangeSetIterator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
private /* protected virtual */ void Dispose(bool disposing)
{
try
{
if (!disposed)
{
//if (disposing)
//{
................................................................................
if (iterator != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3changeset_finalize(
iterator);
iterator = IntPtr.Zero;
}
if (pData != IntPtr.Zero)
{
SQLiteMemory.Free(pData);
pData = IntPtr.Zero;
}
}
}
finally
{
//
// NOTE: Everything should be fully disposed at this point.
//
................................................................................
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteChangeSetIterator()
{
Dispose(false);
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteMemoryChangeSet Class
public sealed class SQLiteMemoryChangeSet :
ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem>,
IDisposable
{
#region Private Data
private byte[] rawData;
private SQLiteConnectionHandle handle;
private SQLiteConnectionFlags flags;
................................................................................
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable<ISQLiteChangeSetMetadataItem> Members
public IEnumerator<ISQLiteChangeSetMetadataItem> GetEnumerator()
{
return new SQLiteChangeSetEnumerator(rawData);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable Members
IEnumerator System.Collections.IEnumerable.GetEnumerator()
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteStreamChangeSet Class
public sealed class SQLiteStreamChangeSet :
ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem>,
IDisposable
{
#region Private Data
private Stream inputStream;
private Stream outputStream;
private SQLiteConnectionHandle handle;
................................................................................
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable<ISQLiteChangeSetMetadataItem> Members
public IEnumerator<ISQLiteChangeSetMetadataItem> GetEnumerator()
{
return new SQLiteChangeSetEnumerator(inputStream, flags);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable Members
IEnumerator System.Collections.IEnumerable.GetEnumerator()
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteChangeSetEnumerator Class
internal sealed class SQLiteChangeSetEnumerator :
IEnumerator<ISQLiteChangeSetMetadataItem>
{
#region Private Data
private SQLiteChangeSetIterator iterator;
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Constructors
public SQLiteChangeSetEnumerator(
byte[] rawData
)
{
iterator = SQLiteChangeSetIterator.Create(rawData);
}
///////////////////////////////////////////////////////////////////////
public SQLiteChangeSetEnumerator(
Stream stream,
SQLiteConnectionFlags flags
)
{
iterator = SQLiteChangeSetIterator.Create(stream, flags);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerator<ISQLiteChangeSetMetadataItem> Members
public ISQLiteChangeSetMetadataItem Current
................................................................................
typeof(SQLiteChangeSetEnumerator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
private /* protected virtual */ void Dispose(bool disposing)
{
try
{
if (!disposed)
{
if (disposing)
{
................................................................................
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteChangeSetEnumerator()
{
Dispose(false);
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
|
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string tableName
);
}
#endregion
///////////////////////////////////////////////////////////////////////////
internal abstract class SQLiteChangeSetIterator : IDisposable
{
#region Private Data
private IntPtr iterator;
#endregion
///////////////////////////////////////////////////////////////////////
#region Protected Constructors
protected SQLiteChangeSetIterator(
IntPtr iterator
)
{
this.iterator = iterator;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Protected Methods
protected void CheckHandle()
{
if (iterator == IntPtr.Zero)
throw new InvalidOperationException("iterator is not open");
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Methods
public void Next()
{
................................................................................
typeof(SQLiteChangeSetIterator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
protected virtual void Dispose(bool disposing)
{
try
{
if (!disposed)
{
//if (disposing)
//{
................................................................................
if (iterator != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3changeset_finalize(
iterator);
iterator = IntPtr.Zero;
}
}
}
finally
{
//
// NOTE: Everything should be fully disposed at this point.
//
................................................................................
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteChangeSetIterator()
{
Dispose(false);
}
#endregion
}
///////////////////////////////////////////////////////////////////////////
#region SQLiteMemoryChangeSetIterator Class
internal sealed class SQLiteMemoryChangeSetIterator :
SQLiteChangeSetIterator
{
#region Private Data
private IntPtr pData;
#endregion
///////////////////////////////////////////////////////////////////////
#region Private Constructors
private SQLiteMemoryChangeSetIterator(
IntPtr pData,
IntPtr iterator
)
: base(iterator)
{
this.pData = pData;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Static "Factory" Methods
public static SQLiteMemoryChangeSetIterator Create(
byte[] rawData
)
{
if (rawData == null)
throw new ArgumentNullException("rawData");
SQLiteMemoryChangeSetIterator result = null;
IntPtr pData = IntPtr.Zero;
IntPtr iterator = IntPtr.Zero;
try
{
int nData = 0;
pData = SQLiteBytes.ToIntPtr(rawData, ref nData);
if (pData == IntPtr.Zero)
throw new SQLiteException(SQLiteErrorCode.NoMem, null);
SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_start(
ref iterator, nData, pData);
if (rc != SQLiteErrorCode.Ok)
throw new SQLiteException(rc, "sqlite3changeset_start");
result = new SQLiteMemoryChangeSetIterator(pData, iterator);
}
finally
{
if (result == null)
{
if (iterator != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3changeset_finalize(
iterator);
iterator = IntPtr.Zero;
}
if (pData != IntPtr.Zero)
{
SQLiteMemory.Free(pData);
pData = IntPtr.Zero;
}
}
}
return result;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
{
throw new ObjectDisposedException(
typeof(SQLiteMemoryChangeSetIterator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
protected override void Dispose(bool disposing)
{
//
// NOTE: Must dispose of the base class first (leaky abstraction)
// because it contains the iterator handle, which must be
// closed *prior* to freeing the underlying memory.
//
base.Dispose(disposing);
try
{
if (!disposed)
{
//if (disposing)
//{
// ////////////////////////////////////
// // dispose managed resources here...
// ////////////////////////////////////
//}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
if (pData != IntPtr.Zero)
{
SQLiteMemory.Free(pData);
pData = IntPtr.Zero;
}
}
}
finally
{
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteStreamChangeSetIterator Class
internal sealed class SQLiteStreamChangeSetIterator :
SQLiteChangeSetIterator
{
#region Private Constructors
private SQLiteStreamChangeSetIterator(
IntPtr iterator
)
: base(iterator)
{
// do nothing.
}
#endregion
///////////////////////////////////////////////////////////////////////
#region Static "Factory" Methods
public static SQLiteStreamChangeSetIterator Create(
Stream stream,
SQLiteConnectionFlags flags
)
{
if (stream == null)
throw new ArgumentNullException("stream");
SQLiteStreamChangeSetIterator result = null;
IntPtr iterator = IntPtr.Zero;
try
{
SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_start_strm(
ref iterator, new SQLiteStreamAdapter(stream, flags).xInput,
IntPtr.Zero);
if (rc != SQLiteErrorCode.Ok)
throw new SQLiteException(rc, "sqlite3changeset_start_strm");
result = new SQLiteStreamChangeSetIterator(iterator);
}
finally
{
if (result == null)
{
if (iterator != IntPtr.Zero)
{
UnsafeNativeMethods.sqlite3changeset_finalize(
iterator);
iterator = IntPtr.Zero;
}
}
}
return result;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
{
throw new ObjectDisposedException(
typeof(SQLiteStreamChangeSetIterator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
protected override void Dispose(bool disposing)
{
try
{
if (!disposed)
{
//if (disposing)
//{
// ////////////////////////////////////
// // dispose managed resources here...
// ////////////////////////////////////
//}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
}
}
finally
{
base.Dispose(disposing);
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteMemoryChangeSet Class
internal sealed class SQLiteMemoryChangeSet :
ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem>,
IDisposable
{
#region Private Data
private byte[] rawData;
private SQLiteConnectionHandle handle;
private SQLiteConnectionFlags flags;
................................................................................
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable<ISQLiteChangeSetMetadataItem> Members
public IEnumerator<ISQLiteChangeSetMetadataItem> GetEnumerator()
{
return new SQLiteMemoryChangeSetEnumerator(rawData);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable Members
IEnumerator System.Collections.IEnumerable.GetEnumerator()
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteStreamChangeSet Class
internal sealed class SQLiteStreamChangeSet :
ISQLiteChangeSet, IEnumerable<ISQLiteChangeSetMetadataItem>,
IDisposable
{
#region Private Data
private Stream inputStream;
private Stream outputStream;
private SQLiteConnectionHandle handle;
................................................................................
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable<ISQLiteChangeSetMetadataItem> Members
public IEnumerator<ISQLiteChangeSetMetadataItem> GetEnumerator()
{
return new SQLiteStreamChangeSetEnumerator(inputStream, flags);
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerable Members
IEnumerator System.Collections.IEnumerable.GetEnumerator()
................................................................................
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteChangeSetEnumerator Class
internal abstract class SQLiteChangeSetEnumerator :
IEnumerator<ISQLiteChangeSetMetadataItem>
{
#region Private Data
private SQLiteChangeSetIterator iterator;
#endregion
///////////////////////////////////////////////////////////////////////
#region Public Constructors
public SQLiteChangeSetEnumerator(
SQLiteChangeSetIterator iterator
)
{
this.iterator = iterator;
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IEnumerator<ISQLiteChangeSetMetadataItem> Members
public ISQLiteChangeSetMetadataItem Current
................................................................................
typeof(SQLiteChangeSetEnumerator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
protected virtual void Dispose(bool disposing)
{
try
{
if (!disposed)
{
if (disposing)
{
................................................................................
///////////////////////////////////////////////////////////////////////
#region Destructor
~SQLiteChangeSetEnumerator()
{
Dispose(false);
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteMemoryChangeSetEnumerator Class
internal sealed class SQLiteMemoryChangeSetEnumerator :
SQLiteChangeSetEnumerator
{
#region Public Constructors
public SQLiteMemoryChangeSetEnumerator(
byte[] rawData
)
: base(SQLiteMemoryChangeSetIterator.Create(rawData))
{
// do nothing.
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
{
throw new ObjectDisposedException(
typeof(SQLiteMemoryChangeSetEnumerator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
protected override void Dispose(bool disposing)
{
try
{
if (!disposed)
{
if (disposing)
{
////////////////////////////////////
// dispose managed resources here...
////////////////////////////////////
}
//////////////////////////////////////
// release unmanaged resources here...
//////////////////////////////////////
}
}
finally
{
base.Dispose(disposing);
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
#region SQLiteStreamChangeSetEnumerator Class
internal sealed class SQLiteStreamChangeSetEnumerator :
SQLiteChangeSetEnumerator
{
#region Public Constructors
public SQLiteStreamChangeSetEnumerator(
Stream stream,
SQLiteConnectionFlags flags
)
: base(SQLiteStreamChangeSetIterator.Create(stream, flags))
{
// do nothing.
}
#endregion
///////////////////////////////////////////////////////////////////////
#region IDisposable "Pattern" Members
private bool disposed;
private void CheckDisposed() /* throw */
{
#if THROW_ON_DISPOSED
if (disposed)
{
throw new ObjectDisposedException(
typeof(SQLiteStreamChangeSetEnumerator).Name);
}
#endif
}
///////////////////////////////////////////////////////////////////////
protected override void Dispose(bool disposing)
{
try
{
//if (!disposed)
//{
// if (disposing)
// {
// ////////////////////////////////////
// // dispose managed resources here...
// ////////////////////////////////////
// }
// //////////////////////////////////////
// // release unmanaged resources here...
// //////////////////////////////////////
//}
}
finally
{
base.Dispose(disposing);
//
// NOTE: Everything should be fully disposed at this point.
//
disposed = true;
}
}
#endregion
}
#endregion
///////////////////////////////////////////////////////////////////////////
|