/// <summary>
/// Implement <see cref="IUnicodeMatcher"/>
/// </summary>
public virtual string ToPattern(bool escapeUnprintable)
{
StringBuffer result = new StringBuffer();
StringBuffer quoteBuf = new StringBuffer();
if (segmentNumber > 0)
{ // i.e., if this is a segment
result.Append('(');
}
for (int i = 0; i < pattern.Length; ++i)
{
char keyChar = pattern[i]; // OK; see note (1) above
IUnicodeMatcher m = data.LookupMatcher(keyChar);
if (m == null)
{
Utility.AppendToRule(result, keyChar, false, escapeUnprintable, quoteBuf);
}
else
{
Utility.AppendToRule(result, m.ToPattern(escapeUnprintable),
true, escapeUnprintable, quoteBuf);
}
}
if (segmentNumber > 0)
{ // i.e., if this is a segment
result.Append(')');
}
// Flush quoteBuf out to result
Utility.AppendToRule(result, -1,
true, escapeUnprintable, quoteBuf);
return(result.ToString());
}
/// <summary>
/// Implement <see cref="IUnicodeMatcher"/> API.
/// </summary>
public virtual string ToPattern(bool escapeUnprintable)
{
StringBuilder result = new StringBuilder();
result.Append(matcher.ToPattern(escapeUnprintable));
if (minCount == 0)
{
if (maxCount == 1)
{
return(result.Append('?').ToString());
}
else if (maxCount == MaxCount)
{
return(result.Append('*').ToString());
}
// else fall through
}
else if (minCount == 1 && maxCount == MaxCount)
{
return(result.Append('+').ToString());
}
result.Append('{');
result.Append(Utility.Hex(minCount, 1));
result.Append(',');
if (maxCount != MaxCount)
{
result.Append(Utility.Hex(maxCount, 1));
}
result.Append('}');
return(result.ToString());
}
/// <summary>
/// Given a <paramref name="matcher"/> reference, which may be null, append its
/// pattern as a literal to the given <paramref name="rule"/>.
/// </summary>
public static void AppendToRule(StringBuffer rule,
IUnicodeMatcher matcher,
bool escapeUnprintable,
StringBuffer quoteBuf)
{
if (matcher != null)
{
AppendToRule(rule, matcher.ToPattern(escapeUnprintable),
true, escapeUnprintable, quoteBuf);
}
}