/// <summary>
/// Processes single merge operation - prepares all valid values and alias informations from the source indexes.
/// When the source indexes contains some array values prepares operation for every descendant index and merge the
/// array into one which will be stored in the target memory entry.
/// </summary>
/// <param name="operation">The operation.</param>
private void processMergeOperation(MergeOperation operation)
{
HashSet <Value> values = new HashSet <Value>();
foreach (var operationData in operation.Indexes)
{
MemoryIndex index = operationData.Item1;
Snapshot snapshot = operationData.Item2;
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.Infos.Readonly, index);
CollectionMemoryUtils.AddAll(values, entry.PossibleValues);
}
if (Structure.Readonly.HasArray(operation.TargetIndex))
{
mergeArrays(operation);
}
if (operation.IsUndefined)
{
values.Add(targetSnapshot.UndefinedValue);
}
Infos.Writeable.SetMemoryEntry(operation.TargetIndex, targetSnapshot.CreateMemoryEntry(values));
}
/// <summary>
/// Assigns the specified collector.
/// </summary>
/// <param name="collector">The collector.</param>
/// <param name="sourceIndex">Index of the source.</param>
internal void Assign(IIndexCollector collector, MemoryIndex sourceIndex)
{
foreach (MemoryIndex mustIndex in collector.MustIndexes)
{
snapshot.DestroyMemory(mustIndex);
CopyWithinSnapshotWorker copyWorker = new CopyWithinSnapshotWorker(snapshot, true);
copyWorker.Copy(sourceIndex, mustIndex);
}
foreach (MemoryIndex mayIndex in collector.MayIndexes)
{
MergeWithinSnapshotWorker mergeWorker = new MergeWithinSnapshotWorker(snapshot);
mergeWorker.MergeIndexes(mayIndex, sourceIndex);
}
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, sourceIndex);
LocationVisitor mustVisitor = new LocationVisitor(snapshot, entry, true);
foreach (ValueLocation location in collector.MustLocation)
{
location.Accept(mustVisitor);
}
LocationVisitor mayVisitor = new LocationVisitor(snapshot, entry, false);
foreach (ValueLocation location in collector.MayLocaton)
{
location.Accept(mayVisitor);
}
}
/// <summary>
/// Visits the information value location.
/// </summary>
/// <param name="location">The location.</param>
public void VisitInfoValueLocation(InfoValueLocation location)
{
MemoryEntry oldEntry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, location.ContainingIndex);
HashSet <Value> newValues = new HashSet <Value>();
CollectionMemoryUtils.AddAll(newValues, oldEntry.PossibleValues);
IEnumerable <Value> values = location.WriteValues(snapshot.MemoryAssistant, entry);
newValues.Add(location.Value);
snapshot.CurrentData.Writeable.SetMemoryEntry(location.ContainingIndex, snapshot.CreateMemoryEntry(newValues));
}
/// <summary>
/// Assigns new value into specified index.
/// </summary>
/// <param name="index">The index.</param>
private void assign(MemoryIndex index)
{
HashSet <Value> newValues = new HashSet <Value>();
if (!isMust)
{
MemoryEntry oldEntry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, index);
CollectionMemoryUtils.AddAll(newValues, oldEntry.PossibleValues);
}
CollectionMemoryUtils.AddAll(newValues, entry.PossibleValues);
snapshot.CurrentData.Writeable.SetMemoryEntry(index, snapshot.CreateMemoryEntry(newValues));
}
/// <summary>
/// Continues the memory index collector node.
/// </summary>
/// <param name="node">The node.</param>
protected void continueMemoryIndexCollectorNode(MemoryIndexCollectorNode node)
{
HashSet <Value> values = new HashSet <Value>();
testAndCreateImplicitArray(node, values);
testAndCreateImplicitObject(node, values);
testAndCreateUndefinedChildren(node);
bool removeUndefined = node.IsMust && node.ContainsUndefinedValue;
if (removeUndefined || values.Count > 0)
{
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(Snapshot, Data, node.TargetIndex);
copyEntryValues(entry, values, removeUndefined, false);
Data.SetMemoryEntry(node.TargetIndex, Snapshot.CreateMemoryEntry(values));
}
enqueueLocationChildNodes(node);
}
private void processSourceValues()
{
MemoryEntry oldEntry = SnapshotDataUtils.GetMemoryEntry(Worker.Snapshot, Worker.Data, SourceIndex);
if (oldEntry.ContainsAssociativeArray)
{
foreach (Value value in oldEntry.PossibleValues)
{
if (!(value is AssociativeArray))
{
Values.Add(value);
}
}
}
else
{
CollectionMemoryUtils.AddAll(Values, oldEntry.PossibleValues);
}
}
public override void ProcessOperation()
{
IIndexDefinition definition = Worker.Structure.GetIndexDefinition(TargetIndex);
if (Node.ScalarValues != null)
{
CollectionMemoryUtils.AddAll(Values, Node.ScalarValues);
}
MemoryEntry oldEntry = SnapshotDataUtils.GetMemoryEntry(Worker.Snapshot, Worker.Data, TargetIndex);
CollectionMemoryUtils.AddAll(Values, oldEntry.PossibleValues);
processArrays(definition.Array);
processAliases(definition.Aliases);
processObjects(definition.Objects);
processIndexModifications(TargetIndex);
setValues();
}
/// <summary>
/// Continues the unknown index collector node.
/// </summary>
/// <param name="node">The node.</param>
protected void continueUnknownIndexCollectorNode(UnknownIndexCollectorNode node)
{
Structure.NewIndex(node.TargetIndex);
PathModifications.GetOrCreateModification(node.TargetIndex).AddDatasource(node.SourceIndex, Snapshot);
IIndexDefinition definition = Structure.GetIndexDefinition(node.SourceIndex);
HashSet <Value> values = new HashSet <Value>();
processSourceAliases(node, definition.Aliases);
processSourceArray(node, definition.Array, values);
processSourceObjects(node, definition.Objects);
testAndCreateImplicitObject(node, values);
testAndCreateUndefinedChildren(node);
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(Snapshot, Data, node.SourceIndex);
copyEntryValues(entry, values, node.IsMust, true);
Data.SetMemoryEntry(node.TargetIndex, Snapshot.CreateMemoryEntry(values));
enqueueLocationChildNodes(node);
}
/// <summary>
/// Assigns the may memory index.
/// </summary>
/// <param name="mayIndex">Index of the may.</param>
/// <param name="composedValues">The composed values.</param>
private void assignMay(MemoryIndex mayIndex, CollectComposedValuesVisitor composedValues)
{
IIndexDefinition data = snapshot.Structure.Readonly.GetIndexDefinition(mayIndex);
HashSet <Value> values = new HashSet <Value>(composedValues.Values);
if (composedValues.Objects.Count > 0)
{
HashSet <ObjectValue> objectsSet = new HashSet <ObjectValue>(data.Objects);
CollectionMemoryUtils.AddAll(objectsSet, composedValues.Objects);
IObjectValueContainer objects = Factories.StructuralContainersFactories.ObjectValueContainerFactory.CreateObjectValueContainer(snapshot.Structure.Writeable, composedValues.Objects);
snapshot.Structure.Writeable.SetObjects(mayIndex, objects);
//if (data.Objects != null)
CollectionMemoryUtils.AddAll(values, data.Objects);
}
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, mayIndex);
CollectionMemoryUtils.AddAll(values, entry.PossibleValues);
snapshot.CurrentData.Writeable.SetMemoryEntry(mayIndex, snapshot.CreateMemoryEntry(values));
}
/// <summary>
/// Processes single merge operation - prepares all valid values and alias informations from the source indexes.
/// When the source indexes contains some array values prepares operation for every descendant index and merge the
/// array into one which will be stored in the target memory entry.
/// </summary>
/// <param name="operation">The operation.</param>
private void processMergeOperation(MergeOperation operation)
{
CollectComposedValuesVisitor visitor = new CollectComposedValuesVisitor();
ReferenceCollector references = new ReferenceCollector();
// Collect all data from source indexes
foreach (var operationData in operation.Indexes)
{
MemoryIndex index = operationData.Item1;
Snapshot snapshot = operationData.Item2;
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, index);
visitor.VisitMemoryEntry(entry);
IMemoryAlias aliases;
if (snapshot.Structure.Readonly.TryGetAliases(index, out aliases))
{
references.CollectMust(aliases.MustAliases, targetSnapshotCallLevel);
references.CollectMay(aliases.MayAliases, targetSnapshotCallLevel);
}
else
{
references.InvalidateMust();
}
}
references.SetAliases(operation.TargetIndex, this, !operation.IsUndefined);
//repares the set of values - array values are traversed
HashSet <Value> values = getValues(operation, visitor);
// If some index in operation can be undefined add undefined value into result
if (operation.IsUndefined)
{
values.Add(targetSnapshot.UndefinedValue);
}
Data.Writeable.SetMemoryEntry(operation.TargetIndex, targetSnapshot.CreateMemoryEntry(values));
writeableStrucure.SetObjects(operation.TargetIndex, Factories.StructuralContainersFactories.ObjectValueContainerFactory.CreateObjectValueContainer(writeableStrucure, visitor.Objects));
}
public void CollectValuesFromSources(MemoryEntryCollector collector)
{
mustHaveArray = true;
foreach (SourceIndex source in SourceIndexes)
{
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(source.Snapshot, source.Snapshot.Data.Readonly, source.Index);
hasArray = false;
this.VisitMemoryEntry(entry);
mustHaveArray &= hasArray;
}
if (!IsMust)
{
if (ScalarValues == null)
{
ScalarValues = new HashSet <Value>();
}
this.ScalarValues.Add(collector.Snapshot.UndefinedValue);
}
}
/// <summary>
/// Deeply copies the specified source index into target index.
/// </summary>
/// <param name="sourceIndex">Index of the source.</param>
/// <param name="targetIndex">Index of the target.</param>
public void Copy(MemoryIndex sourceIndex, MemoryIndex targetIndex)
{
if (!sourceIndex.IsPrefixOf(targetIndex) && !targetIndex.IsPrefixOf(sourceIndex))
{
var writeablestrucutre = snapshot.Structure.Writeable;
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, sourceIndex);
CopyWithinSnapshotVisitor visitor = new CopyWithinSnapshotVisitor(snapshot, this, targetIndex);
visitor.VisitMemoryEntry(entry);
if (isMust && visitor.GetValuesCount() == 1 && objectValues.Count == 1)
{
IObjectValueContainerBuilder objectsValues = snapshot.Structure.Readonly.GetObjects(targetIndex).Builder(writeablestrucutre);
ObjectValue value = objectValues.First();
objectsValues.Add(value);
writeablestrucutre.SetObjects(targetIndex, objectsValues.Build(writeablestrucutre));
}
else if (objectValues.Count > 0)
{
IObjectValueContainerBuilder objectsValues = snapshot.Structure.Readonly.GetObjects(targetIndex).Builder(writeablestrucutre);
foreach (ObjectValue value in objectValues)
{
objectsValues.Add(value);
}
writeablestrucutre.SetObjects(targetIndex, objectsValues.Build(writeablestrucutre));
}
if (!isMust)
{
visitor.AddValue(snapshot.UndefinedValue);
}
snapshot.CopyAliases(sourceIndex, targetIndex, isMust);
snapshot.Data.Writeable.SetMemoryEntry(targetIndex, visitor.GetCopiedEntry());
}
}
/// <summary>
/// Reads the values from locations specified by given collector.
/// </summary>
/// <param name="collector">The collector.</param>
/// <returns>Memory entry with values from locations specified by given collector.</returns>
public MemoryEntry ReadValue(IIndexCollector collector)
{
if (collector.MustIndexesCount == 1 && collector.IsDefined)
{
MemoryIndex index = collector.MustIndexes.First();
return(SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, index));
}
else
{
HashSet <Value> values = new HashSet <Value>();
if (!collector.IsDefined)
{
values.Add(snapshot.UndefinedValue);
}
foreach (MemoryIndex index in collector.MustIndexes)
{
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, index);
CollectionMemoryUtils.AddAll(values, entry.PossibleValues);
}
foreach (ValueLocation location in collector.MustLocation)
{
if (snapshot.CurrentMode == SnapshotMode.MemoryLevel)
{
CollectionMemoryUtils.AddAll(values, location.ReadValues(snapshot.MemoryAssistant));
}
else
{
InfoLocationVisitor visitor = new InfoLocationVisitor(snapshot);
location.Accept(visitor);
CollectionMemoryUtils.AddAll(values, visitor.Value);
}
}
return(new MemoryEntry(values));
}
}
private void processMergeOperation(MergeOperation operation)
{
CollectComposedValuesVisitor visitor = new CollectComposedValuesVisitor();
ReferenceCollector references = new ReferenceCollector();
foreach (var item in operation.Indexes)
{
Snapshot snapshot = item.Item2;
MemoryIndex index = item.Item1;
MemoryEntry entry = SnapshotDataUtils.GetMemoryEntry(snapshot, snapshot.CurrentData.Readonly, index);
visitor.VisitMemoryEntry(entry);
IMemoryAlias aliases;
if (snapshot.Structure.Readonly.TryGetAliases(index, out aliases))
{
references.CollectMust(aliases.MustAliases, snapshot.CallLevel);
references.CollectMay(aliases.MayAliases, snapshot.CallLevel);
}
else
{
references.InvalidateMust();
}
}
if (references.HasAliases && !operation.IsRoot)
{
if (!operation.IsUndefined && operation.Indexes.Count == 1 && references.HasMustAliases)
{
if (targetSnapshot == operation.Indexes.First().Item2)
{
references.AddMustAlias(operation.Indexes.First().Item1);
}
}
else
{
HashSet <MemoryIndex> referenceIndexes = new HashSet <MemoryIndex>();
foreach (var item in operation.Indexes)
{
MemoryIndex index = item.Item1;
Snapshot snapshot = item.Item2;
if (index != operation.TargetIndex && targetSnapshot == snapshot)
{
referenceIndexes.Add(index);
}
}
references.CollectMay(referenceIndexes, targetSnapshot.CallLevel);
}
}
references.SetAliases(operation.TargetIndex, targetSnapshot, !operation.IsUndefined);
HashSet <Value> values = getValues(operation.TargetIndex, visitor, operation.IsUndefined);
if (operation.IsUndefined)
{
values.Add(targetSnapshot.UndefinedValue);
}
targetSnapshot.CurrentData.Writeable.SetMemoryEntry(operation.TargetIndex, targetSnapshot.CreateMemoryEntry(values));
}