/// <summary>
/// Recognizes named entities occurring in content text that recorded in the dictionary.
/// </summary>
/// <param name="content">The content string to recognize the named entities.</param>
/// <returns>A set of <see cref="NamedEntityInfo<T>"/> represents named entities that is recognized from the content text.</returns>
public IList <NamedEntityInfo <T> > Recognize(string content)
{
content = content.ToLower();
IList <string> tokens = NamedEntityDictionary <T> .Tokenize(content);
IList <NamedEntityInfo <T> > result = new List <NamedEntityInfo <T> >();
int contentIndex = 0;
while (tokens.Count > 0)
{
PrefixMatch <string, T> match = this.prefixTree.LongestPrefixMatch(tokens);
if (match.Length == 0)
{
contentIndex += tokens[0].Length;
tokens.RemoveAt(0);
continue;
}
int termLength = 0;
for (int index = 0; index < match.Length; index++)
{
termLength += tokens[0].Length;
tokens.RemoveAt(0);
}
NamedEntityInfo <T> entity =
new NamedEntityInfo <T>(match.Value, contentIndex, termLength);
result.Add(entity);
contentIndex += termLength;
}
return(result);
}
private bool tryMask(PrefixEntry entry, bool topLevel, string callsign)
{
bool result = false;
if (usPossesions.Contains(Convert.ToInt32(entry.Data.ADIF)) & topLevel == true)
{
result = true;
}
//check entry kind
else if (topLevel)
{
if (!AllowedForTop.Contains(entry.Kind))
{
return(result);
}
}
else
{
if (!AllowedForSub.Contains(entry.Kind))
{
return(result);
}
}
// mobile, portable, beacon, rover
if (callsign.EndsWith("/M") || callsign.EndsWith("/P") || callsign.EndsWith("/B") || callsign.EndsWith("/R"))
{
callsign = callsign.Substring(0, callsign.Length - 2);
}
string[] maskParts = entry.Mask.Split(',');
for (int i = 0; i < maskParts.Length; i++)
{
PrefixMatch prefixMatch = comparePrefix(maskParts[i], callsign);
EndingMatch endingMatch = compareEnding(maskParts[i], callsign);
if (topLevel)
{
result = ResultForTop[(int)prefixMatch, (int)endingMatch];
}
else
{
result = ResultForChild[(int)prefixMatch, (int)endingMatch];
}
if (result)
{
break;
}
}
return(result);
}
