/// <inheritdoc cref="MorphologyProvider.RewriteQuery"/>
public override string RewriteQuery
(
string queryExpression
)
{
QueryManager manager = new QueryManager();
QAst ast = manager.ParseQuery(queryExpression);
ast.Walk(_QueryWalker);
string result = manager.SerializeAst(ast);
return(result);
}
private bool _QueryWalker
(
[NotNull] QAst ast
)
{
string prefix = Prefix.ThrowIfNull("Prefix");
for (int i = 0; i < ast.Children.Count; i++)
{
QAst child = ast.Children[i];
QAstEntry entry = child as QAstEntry;
if (entry != null)
{
if (entry.Expression.StartsWith(prefix) &&
entry.Ending == EndingKind.NoTrim)
{
string word = string.IsNullOrEmpty(prefix)
? entry.Expression
: entry.Expression.Substring(prefix.Length);
MorphologyEntry[] entries = FindWord(word);
string[] flatten = Flatten(word, entries);
if (flatten.Length > 1)
{
QAstParen paren = new QAstParen();
QAst newAst = _MakeAst(flatten, entry.Tags);
paren.Children.Add(newAst);
ast.Children[i] = paren;
return(false);
}
}
}
}
return(true);
}
