public void Build(IList<int> text, int alphabet_size, ISymbolCoder symbol_split = null, SequenceBuilder seq_builder = null)
{
if (symbol_split == null) {
symbol_split = new EqualSizeCoder(4, alphabet_size-1);
}
this.SymbolCoder = symbol_split;
var list = this.SymbolCoder.Encode(0, null);
var numbits = list[0].numbits;
var arity = (short)(1 << numbits);
this.Alphabet = new WTM_Leaf[alphabet_size];
this.Root = new WTM_Inner (arity, null, true);
for (int i = 0; i < text.Count; i++) {
this.Add (text [i], list);
}
if (seq_builder == null) {
seq_builder = SequenceBuilders.GetSeqPlain(arity);
}
this.FinishBuild (this.Root, seq_builder, arity);
}