KeyScoreOrderedList GetCombinedSliceSuggestions(int startLhs, int limitLhs, int startRhs, int limitRhs)
{
Debug.Assert(startLhs < limitLhs);
Debug.Assert(limitLhs <= startRhs);
Debug.Assert(startRhs <= limitRhs);
var key = new[] { startLhs, limitLhs, startRhs, limitRhs };
WeakReference <KeyScoreOrderedList> reference;
_cache.TryGetValue(key, out reference);
KeyScoreOrderedList list;
if (reference == null || !reference.TryGetTarget(out list))
{
if (reference != null)
{
Debug.WriteLine("Cache item garbage collected");
}
list = new KeyScoreOrderedList();
for (var indexLhs = startLhs; indexLhs < limitLhs; indexLhs++)
{
list.Include(_dictionaryList[indexLhs].predictions);
}
for (var indexRhs = startRhs; indexRhs < limitRhs; indexRhs++)
{
list.Include(_dictionaryList[indexRhs].predictions);
}
_cache[key] = new WeakReference <KeyScoreOrderedList>(list);
}
else
{
Debug.WriteLine($"Cache hit! [{startLhs}..{limitLhs})={limitLhs - startLhs} & [{startRhs}..{limitRhs})={limitRhs - startRhs} :=> {limitLhs - startLhs + limitRhs - startRhs}");
}
return(list);
}
internal static KeyScoreOrderedList Read(BinaryReader reader)
{
var list = new KeyScoreOrderedList();
var scoredKeysCount = reader.ReadInt32();
for (var index = 0; index < scoredKeysCount; index++)
{
var key = reader.ReadInt32();
var score = reader.ReadDouble();
list.Include(key, score);
}
return(list);
}
void DumpPrefixes(int lowerPosition, int upperPosition)
{
if (lowerPosition < upperPosition)
{
if (lowerPosition + 1 == upperPosition)
{
var key = _dictionaryList[lowerPosition].key;
Debug.Write(" :");
foreach (var word in key)
{
Debug.Write(" " + word);
}
Debug.Write(" =>");
foreach (var pair in _dictionaryList[lowerPosition].predictions.KeyScorePairs)
{
Debug.Write(" " + pair.key);
}
Debug.WriteLine("");
}
else
{
var combined = new KeyScoreOrderedList();
for (var position = lowerPosition; position < upperPosition; position++)
{
foreach (var pair in _dictionaryList[position].predictions.KeyScorePairs)
{
combined.Include(pair.key, pair.score);
}
}
Debug.Write(" : * =>");
foreach (var pair in combined.KeyScorePairs)
{
Debug.Write(" " + pair.key);
}
Debug.WriteLine("");
}
}
}