public ConditionParser(string condition, FullTextSearchOptions options)
{
ConditionStream stream = new ConditionStream(condition, options);
this.options = options;
RootExpression = new ConditionExpression(options);
currentExpression = RootExpression;
Reset();
while (stream.Read())
{
if (ConditionOperator.IsSymbol(stream.Current))
{
PutToken();
SetToken(stream.Current);
PutToken();
continue;
}
switch (stream.Current)
{
case ' ':
PutToken();
continue;
case '(':
PushExpression();
continue;
case ')':
PopExpression();
continue;
case '"':
PutToken();
inQuotes = true;
SetToken(stream.ReadQuote());
PutToken();
inQuotes = false;
continue;
}
AddToken(stream.Current);
}
PutToken();
if (!ReferenceEquals(RootExpression, currentExpression))
{
if ((options & FullTextSearchOptions.ThrowOnUnbalancedParens) != 0)
{
throw new InvalidOperationException("Unbalanced parentheses.");
}
}
}
public string ReadQuote()
{
StringBuilder sb = new StringBuilder();
while (Read())
{
if (Current.Equals('"'))
{
if ((index + 1) == condition.Length)
{
index = condition.Length;
return(sb.ToString());
}
char peek = condition[index + 1];
if ((peek == ' ') || (peek == ')') || (peek == '(') || (ConditionOperator.IsSymbol(peek)))
{
return(sb.ToString());
}
if (peek == '"')
{
index += 1;
}
else
{
if ((options & FullTextSearchOptions.ThrowOnUnbalancedQuotes) != 0)
{
return(sb.ToString());
}
}
}
sb.Append(Current);
}
if ((options & FullTextSearchOptions.ThrowOnUnbalancedQuotes) != 0)
{
throw new InvalidOperationException("Unbalanced quotes.");
}
return(sb.ToString());
}