/// <summary>
/// Merges the object definitions.
/// </summary>
protected void mergeObjectDefinitions()
{
foreach (var objectDefinition in changeTree.ObjectTreeRoots)
{
ObjectValue objectValue = objectDefinition.Key;
MemoryIndexTreeNode treeNode = objectDefinition.Value;
IObjectDescriptor targetDescriptor;
bool containsTargetDescriptor = targetStructure.TryGetDescriptor(objectValue, out targetDescriptor);
bool alwaysDefined = true;
List <ContainerContext> sourceContainers = new List <ContainerContext>();
// Iterate sources to collect object descriptors
foreach (SnapshotContext context in snapshotContexts)
{
IObjectDescriptor descriptor;
if (context.SourceStructure.TryGetDescriptor(objectValue, out descriptor))
{
// Source contains object - add descriptor to sources
sourceContainers.Add(new ContainerContext(context, descriptor));
if (targetDescriptor == null)
{
// Descriptor is not in the target structure - use current as target
targetDescriptor = descriptor;
}
}
else
{
// Object is at least once undefined - weak merge
alwaysDefined = false;
}
}
// Merge object descriptor and prepare operations of modified fields
if (targetDescriptor != null)
{
ObjectTargetContainerContext objectContext = new ObjectTargetContainerContext(writeableTargetStructure, targetDescriptor);
createAndEnqueueOperations(objectContext, treeNode, sourceContainers, alwaysDefined);
// Save updated descriptor if instance changed or is not stored in target
if (isStructureWriteable)
{
IObjectDescriptor currentDescriptor = objectContext.getCurrentDescriptor();
if (!containsTargetDescriptor || currentDescriptor != targetDescriptor)
{
writeableTargetStructure.SetDescriptor(objectValue, currentDescriptor);
}
}
}
}
}
/// <summary>
/// Creates the merge operation for all fields of specified object.
/// </summary>
/// <param name="objectValue">The object value.</param>
private void mergeObject(ObjectValue objectValue)
{
IObjectDescriptorBuilder builder =
Factories.StructuralContainersFactories.ObjectDescriptorFactory.CreateObjectDescriptor(writeableStrucure, objectValue, null, ObjectIndex.CreateUnknown(objectValue))
.Builder(writeableStrucure);
ContainerOperations collectVariables = new ContainerOperations(this, builder, builder.UnknownIndex, builder.UnknownIndex);
foreach (Snapshot snapshot in sourceSnapshots)
{
IObjectDescriptor descriptor;
if (snapshot.Structure.Readonly.TryGetDescriptor(objectValue, out descriptor))
{
collectVariables.CollectIndexes(snapshot, builder.UnknownIndex, descriptor);
builder.SetType(descriptor.Type);
}
else
{
collectVariables.SetUndefined();
}
}
collectVariables.MergeContainers();
writeableStrucure.SetDescriptor(objectValue, builder.Build(writeableStrucure));
}
/// <summary>
/// Merges the arrays into the target index and clear inner collection.
/// </summary>
/// <param name="targetSnapshot">The target snapshot.</param>
/// <param name="targetIndex">Index of the target.</param>
/// <param name="operation">The operation.</param>
public void MergeArraysAndClear(Snapshot targetSnapshot, MemoryIndex targetIndex, MergeOperation operation)
{
if (hasArray)
{
if (targetArray == null)
{
targetArray = targetSnapshot.CreateArray();
}
IArrayDescriptor targetArrayDescriptor;
if (!writeableTargetStructure.TryGetDescriptor(targetArray, out targetArrayDescriptor))
{
// Target does not contain array - create and add new in target snapshot
targetArrayDescriptor = worker.Factories.StructuralContainersFactories.ArrayDescriptorFactory.CreateArrayDescriptor(writeableTargetStructure, targetArray, targetIndex);
writeableTargetStructure.SetDescriptor(targetArray, targetArrayDescriptor);
writeableTargetStructure.NewIndex(targetArrayDescriptor.UnknownIndex);
writeableTargetStructure.SetArray(targetIndex, targetArray);
}
// Create context and merge descriptors
var arrayContext = new ArrayTargetContainerContext(writeableTargetStructure, targetArrayDescriptor);
worker.CreateAndEnqueueOperations(arrayContext, operation.TreeNode, sourceArrays, arrayAlwaysDefined && !operation.IsUndefined);
// Update current descriptor when changed
IArrayDescriptor currentDescriptor = arrayContext.getCurrentDescriptor();
if (currentDescriptor != targetArrayDescriptor)
{
writeableTargetStructure.SetDescriptor(targetArray, currentDescriptor);
}
sourceArrays.Clear();
hasArray = false;
targetArray = null;
}
else if (targetArray != null)
{
worker.DeleteArray(targetIndex, targetArray);
targetArray = null;
}
arrayAlwaysDefined = true;
}
