private void AddSuffixEdge(WordVertex vertex)
{
string suffix = vertex.Word.Substring(1);
WordVertex suffixVertex = GetVertex(suffix, false);
suffixVertex.Add(new FixEdge(vertex.Word[0], Fix.Prefix, vertex));
}
private void AddPrefixEdge(WordVertex vertex)
{
string prefix = vertex.Word.Substring(0, vertex.Word.Length - 1);
WordVertex prefixVertex = GetVertex(prefix, false);
prefixVertex.Add(new FixEdge(vertex.Word[prefix.Length], Fix.Suffix, vertex));
}
private ValidWord GetValid(string word)
{
WordVertex vertex = vertices[word];
Fix one = vertex.OneFixes;
Fix twoMore = twoMoreFixes[word];
return(new ValidWord(word, one, twoMore));
}
private void AddEdgesIfNeeded(WordVertex vertex)
{
if (vertex.Word.Length == 1)
{
return;
}
AddPrefixEdge(vertex);
AddSuffixEdge(vertex);
}
public FixEdge(char letter, Fix fix, WordVertex vertex)
{
if (fix != Fix.Prefix && fix != Fix.Suffix)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Invalid fixes : {0}", fix), "fix");
}
this.letter = letter;
this.fix = fix;
this.vertex = vertex;
}
private WordVertex GetVertex(string word, bool valid)
{
WordVertex vertex;
if (vertices.TryGetValue(word, out vertex))
{
if (valid)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "{0} already found but not valid (are words sorted by size?)", word), "valid");
}
return(vertex);
}
vertex = new WordVertex(word, valid);
vertices.Add(word, vertex);
AddEdgesIfNeeded(vertex);
return(vertex);
}
