/// <summary>
/// Initializes a new instance of the <see cref="ArrayDescriptor"/> class.
/// </summary>
/// <param name="arrayDescriptorBuilder">The array descriptor builder.</param>
public ArrayDescriptor(ArrayDescriptorBuilder arrayDescriptorBuilder)
{
Indexes = new ReadOnlyDictionary <string, MemoryIndex>(arrayDescriptorBuilder.Indexes);
ParentVariable = arrayDescriptorBuilder.ParentVariable;
UnknownIndex = arrayDescriptorBuilder.UnknownIndex;
ArrayValue = arrayDescriptorBuilder.ArrayValue;
}
/// <summary>
/// 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>
/// <returns>Array where the input arrays is merged into.</returns>
private Value mergeArrays(MergeOperation operation)
{
ArrayDescriptorBuilder builder = new ArrayDescriptorBuilder();
builder.SetParentVariable(operation.TargetIndex);
builder.SetUnknownField(operation.TargetIndex.CreateUnknownIndex());
ContainerOperations collectVariables = new ContainerOperations(this, builder, operation.TargetIndex, builder.UnknownIndex);
// Collecting possible indexes of merged array
AssociativeArray targetArray = null;
foreach (var operationData in operation.Indexes)
{
MemoryIndex index = operationData.Item1;
Snapshot snapshot = operationData.Item2;
AssociativeArray arrayValue;
if (snapshot.Structure.TryGetArray(index, out arrayValue))
{
// Target array value will be the firs one
if (targetArray == null)
{
if (index.Equals(operation.TargetIndex))
{
targetArray = arrayValue;
}
}
ArrayDescriptor descriptor = snapshot.Structure.GetDescriptor(arrayValue);
collectVariables.CollectIndexes(snapshot, index, descriptor);
}
else
{
collectVariables.SetUndefined();
}
}
if (targetArray == null)
{
targetArray = targetSnapshot.CreateArray();
}
builder.SetArrayValue(targetArray);
collectVariables.MergeContainers();
Structure.SetArray(operation.TargetIndex, targetArray);
Structure.SetDescriptor(targetArray, builder.Build());
return(targetArray);
}
