/// <summary>
/// Processes the index - traverse thru array or sets path to undefined. When memory location contains
/// no array and undefined value new array is created.
/// </summary>
/// <param name="segment">The segment.</param>
/// <param name="parentIndex">Index of the parent.</param>
/// <param name="visitor">The visitor to process scalar values.</param>
/// <param name="isMust">if set to <c>true</c> [is must].</param>
private void processIndex(PathSegment segment, MemoryIndex parentIndex, IndexLocationVisitor visitor, bool isMust)
{
AssociativeArray arrayValue = null;
bool processOtherValues = false;
MemoryEntry entry;
if (snapshot.Data.TryGetMemoryEntry(parentIndex, out entry))
{
if (snapshot.Structure.TryGetArray(parentIndex, out arrayValue))
{
processOtherValues = entry.Count > 1;
}
else if (entry.Count > 0)
{
processOtherValues = true;
}
else
{
entry = snapshot.Data.EmptyEntry;
processOtherValues = true;
}
}
else
{
entry = snapshot.Data.EmptyEntry;
processOtherValues = true;
snapshot.Structure.TryGetArray(parentIndex, out arrayValue);
}
if (processOtherValues)
{
visitor.ProcessValues(parentIndex, entry.PossibleValues, isMust);
ReadIndexVisitor valueVisitor = visitor.LastValueVisitor;
bool removeUndefined = isMust;
if (valueVisitor.ContainsDefinedValue || valueVisitor.ContainsAnyValue)
{
isMust = false;
}
if (valueVisitor.ContainsUndefinedValue)
{
if (arrayValue == null)
{
arrayValue = snapshot.CreateArray(parentIndex, isMust, removeUndefined);
}
else if (removeUndefined)
{
snapshot.Structure.Data.RemoveUndefined(parentIndex);
}
}
}
if (arrayValue != null)
{
ArrayDescriptor descriptor = snapshot.Structure.GetDescriptor(arrayValue);
creatorVisitor.ArrayValue = arrayValue;
processSegment(segment, descriptor, isMust);
}
}
/// <summary>
/// Allews descendant implementation to continue traversing memory by indexing values ar accesing their fields.
/// </summary>
/// <param name="parentIndex">Index of the parent.</param>
/// <param name="values">The values.</param>
/// <param name="isMust">if set to <c>true</c> is must.</param>
public override void ProcessValues(MemoryIndex parentIndex, IEnumerable <Value> values, bool isMust)
{
HashSet <ValueLocation> targetSet = mayLocationProcess;
if (isMust && values.Count() == 1)
{
targetSet = mustLocationProcess;
}
LastValueVisitor = new ReadIndexVisitor(parentIndex, indexSegment, targetSet);
LastValueVisitor.VisitValues(values);
}
/// <summary>
/// Allews descendant implementation to continue traversing memory by indexing values ar accesing their fields.
/// </summary>
/// <param name="parentIndex">Index of the parent.</param>
/// <param name="values">The values.</param>
/// <param name="isMust">if set to <c>true</c> is must.</param>
public override void ProcessValues(MemoryIndex parentIndex, IEnumerable <Value> values, bool isMust)
{
ReadIndexVisitor visitor = new ReadIndexVisitor(parentIndex, indexSegment, collector.mustLocationProcess);
visitor.VisitValues(values);
}