/// <summary>
/// NodeCursor should only see changes that are there from the beginning
/// otherwise it will not be stable.
/// </summary>
private bool HasChanges()
{
switch (_hasChanges)
{
case Org.Neo4j.Kernel.Impl.Newapi.HasChanges.Maybe:
bool changes = _read.hasTxStateWithChanges();
if (changes)
{
if (_single != NO_ID)
{
_addedNodes = _read.txState().nodeIsAddedInThisTx(_single) ? LongSets.immutable.of(_single).longIterator() : ImmutableEmptyLongIterator.INSTANCE;
}
else
{
_addedNodes = _read.txState().addedAndRemovedNodes().Added.freeze().longIterator();
}
_hasChanges = HasChanges.Yes;
}
else
{
_hasChanges = HasChanges.No;
}
return(changes);
case Org.Neo4j.Kernel.Impl.Newapi.HasChanges.Yes:
return(true);
case Org.Neo4j.Kernel.Impl.Newapi.HasChanges.No:
return(false);
default:
throw new System.InvalidOperationException("Style guide, why are you making me do this");
}
}
internal virtual void Single(long reference, Read read)
{
_storeCursor.single(reference);
this._read = read;
this._single = reference;
this._hasChanges = HasChanges.Maybe;
this._addedNodes = ImmutableEmptyLongIterator.INSTANCE;
}
internal virtual void Scan(Read read)
{
_storeCursor.scan();
this._read = read;
this._single = NO_ID;
this._hasChanges = HasChanges.Maybe;
this._addedNodes = ImmutableEmptyLongIterator.INSTANCE;
}
/// <summary>
/// can throw exception in case of error
/// </summary>
private void PerformSave(string fileName)
{
using (var file = File.Create(fileName))
{
Config.SaveXml(file);
}
// succeeded
FilePathName.SetValue(fileName);
FilePathValid.SetValue(true);
HasChanges.SetValue(false);
}
public override void Close()
{
if (!Closed)
{
_read = null;
_hasChanges = HasChanges.Maybe;
_addedNodes = ImmutableEmptyLongIterator.INSTANCE;
_storeCursor.reset();
_pool.accept(this);
}
}
private void DoNew()
{
if (!CanDiscardOldData("Create New Configuration"))
{
return;
}
Config.Reset();
FilePathName.SetValue(FileNameNew);
FilePathValid.SetValue(false);
HasChanges.SetValue(false);
}
/// <summary>
/// can throw exception in case of error
/// </summary>
private void PerformOpen(string fileName)
{
try
{
using (var file = File.OpenRead(fileName))
{
Config.ReadXml(file);
}
}
catch (Exception)
{
Config.Reset();
throw;
}
// succeeded
FilePathName.SetValue(fileName);
FilePathValid.SetValue(true);
HasChanges.SetValue(false);
}