private void UpdatePropTypeRecord(string propName, IResource res)
{
IResultSet rs = _propTypeTable.CreateModifiableResultSet(1, propName);
try
{
IEnumerator enumerator = rs.GetEnumerator();
using ((IDisposable)enumerator)
{
if (!enumerator.MoveNext())
{
throw new StorageException("Cannot find the property type to be updated");
}
IRecord rec = (IRecord)enumerator.Current;
if (rec.GetIntValue(2) != res.GetIntProp("DataType"))
{
throw new StorageException("Invalid attempt to change data type of property " + propName +
" from " + (PropDataType)rec.GetIntValue(2) +
" to " + (PropDataType)res.GetIntProp("DataType"));
}
rec.SetValue(3, res.GetIntProp("Flags"));
_storage.SafeCommitRecord(rec, "PropTypeCollection.UpdatePropTypeRecord");
}
}
finally
{
rs.Dispose();
}
}
public static IResultSet <T> ToSortedResultSet(IResultSet <T> source)
{
if (source is SortedResultSet <T> )
{
return(source);
}
return(new SortedResultSet <T>(source.GetEnumerator()));
}
public static IResultSet <T> ToBaggedResultSet(IResultSet <T> source)
{
if (source is ListedResultSet <T> )
{
return(source);
}
return(new ListedResultSet <T>(source.GetEnumerator()));
}
private void ProcessUpdates()
{
IResultSet <TKey, TValue> results = null;
IEnumerator <KeyValuePair <TKey, TValue> > enumerator;
KeyValuePair <TKey, TValue> item;
do
{
Monitor.Enter(_syncLock);
try
{
if (_updateRequests.Count == 0)
{
_updateInProgress = false;
}
else
{
results = _updateRequests.Dequeue();
}
}
finally
{
Monitor.Exit(_syncLock);
}
if (_updateInProgress && results != null)
{
using (results)
{
using (enumerator = results.GetEnumerator())
{
while (enumerator.MoveNext())
{
try
{
item = enumerator.Current;
_cache.Add(item);
}
catch (Exception e)
{
OnError(new OnErrorEventArgs(e));
}
}
}
}
OnFilled(new OnFilledEventArgs());
}
} while (_updateInProgress);
}
protected SafeRecordEnumeratorBase(IResultSet resultSet, string operation)
{
_resultSet = resultSet;
_operation = operation;
try
{
_baseEnumerator = resultSet.GetEnumerator();
}
catch (IOException ex)
{
_ioError = true;
_resultSet.Dispose();
MyPalStorage.Storage.OnIOErrorDetected(ex);
_baseEnumerator = null;
}
}
private void RepairProps(ITable propTable, PropDataType dataType)
{
HashSet resPropTypes = new HashSet();
int lastResID = -1;
using (IResultSet rs = propTable.CreateResultSet(0))
{
IEnumerator enumerator = rs.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
IRecord rec;
try
{
rec = (IRecord)enumerator.Current;
}
catch (AttemptReadingDeletedRecordException)
{
ReportError("Deleted record found in index for " + dataType + " property table");
continue;
}
_propCount++;
int resID = rec.GetIntValue(0);
int propType = rec.GetIntValue(1);
if (resID != lastResID)
{
lastResID = resID;
resPropTypes.Clear();
}
IRecord resRec = _resources.GetRecordByEqual(0, resID);
if (resRec == null)
{
ReportError("Found a property of a non-existing resource " + resID);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
continue;
}
if (!_propTypeMap.Contains(propType))
{
ReportError("Found a property with an invalid type " + propType);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
continue;
}
if ((int)_propDataTypes [propType] != (int)dataType)
{
ReportError("Type of property " + propType + " does not match type of table " + dataType);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
continue;
}
string propTypeName = (string)_propTypeMap [propType];
if (dataType != PropDataType.StringList && resPropTypes.Contains(propType))
{
ReportError("Duplicate property " + propTypeName + " of resource " + resID);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
continue;
}
if (dataType == PropDataType.Blob)
{
IBLOB blob = rec.GetBLOBValue(2);
Stream stream;
try
{
stream = blob.Stream;
}
catch (IOException)
{
ReportError("Missing blob stream for property " + propTypeName + " of resource " + resID);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
continue;
}
try
{
long length = stream.Length;
byte[] buffer = new byte[4096];
for (long bytesRead = 0; bytesRead < length; bytesRead += 4096)
{
int bytesToRead = Math.Min(4096, (int)(length - bytesRead));
stream.Read(buffer, 0, bytesToRead);
}
}
catch (IOException)
{
ReportError("Failed to read blob stream for property " + propTypeName + " of resource " + resID);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
}
stream.Close();
}
else if (dataType == PropDataType.String || dataType == PropDataType.LongString)
{
try
{
rec.GetStringValue(2);
}
catch (IOException ex)
{
ReportError("Failed to read string value for property " + propTypeName + " of resource " + resID);
if (_fixErrors)
{
rec.Delete();
_fixCount++;
}
}
}
resPropTypes.Add(propType);
}
}
finally
{
IDisposable disp = enumerator as IDisposable;
if (disp != null)
{
disp.Dispose();
}
}
}
}
public IEnumerator GetEnumerator()
{
return(new VerifyStringEnumerator(_resultSet.GetEnumerator(), _indexStringColumn, _value));
}