/// <summary>
/// <para>Tokenize the sense's equiv, presented as hybrid text.</para>
/// <para>During parsing, creates new word IDs as tokens come up.</para>
/// </summary>
public ReadOnlyCollection <EquivToken> Tokenize(HybridText txt)
{
List <EquivToken> res = new List <EquivToken>();
int runIX = -1;
foreach (TextRun tr in txt.Runs)
{
++runIX;
if (tr is TextRunZho)
{
int idZho = wh.IdZho;
EquivToken eqt = new EquivToken
{
TokenId = idZho,
RunIx = runIX,
StartInRun = 0,
LengthInRun = 0,
};
res.Add(eqt);
continue;
}
string str = tr.GetPlainText();
tokenizeRun(str, runIX, res);
}
return(new ReadOnlyCollection <EquivToken>(res));
}
/// <summary>
/// Serialize to binary stream.
/// </summary>
public void Serialize(BinWriter bw)
{
bw.WriteInt(EntryId);
bw.WriteInt(SenseIx);
int equivTokenCount = EquivTokens.Count;
bw.WriteInt(equivTokenCount);
for (int i = 0; i != equivTokenCount; ++i)
{
EquivToken eqt = EquivTokens[i];
if (eqt.RunIx < byte.MinValue || eqt.RunIx > byte.MaxValue)
{
throw new Exception("RangeIx value out of byte range: " + eqt.StartInRun.ToString());
}
if (eqt.StartInRun < short.MinValue || eqt.StartInRun > short.MaxValue)
{
throw new Exception("StartInSense value out of short range: " + eqt.StartInRun.ToString());
}
if (eqt.LengthInRun < short.MinValue || eqt.LengthInRun > short.MaxValue)
{
throw new Exception("LengthInSense value out of short range: " + eqt.LengthInRun.ToString());
}
byte rangeIx = (byte)eqt.RunIx;
short startInSense = (short)eqt.StartInRun;
short lengthInSense = (short)eqt.LengthInRun;
bw.WriteInt(eqt.TokenId);
bw.WriteByte(rangeIx);
bw.WriteShort(startInSense);
bw.WriteShort(lengthInSense);
}
}
/// <summary>
/// Ctor: read from binary stream.
/// </summary>
public TokenizedSense(BinReader br)
{
EntryId = br.ReadInt();
SenseIx = br.ReadInt();
int equivTokenCount = br.ReadInt();
EquivTokens = new List <EquivToken>(equivTokenCount);
for (int i = 0; i != equivTokenCount; ++i)
{
EquivToken eqt = new EquivToken();
eqt.TokenId = br.ReadInt();
eqt.RunIx = (int)br.ReadByte();
eqt.StartInRun = (int)br.ReadShort();
eqt.LengthInRun = (int)br.ReadShort();
EquivTokens.Add(eqt);
}
}
/// <summary>
/// Tokenizes a single plain text run.
/// </summary>
/// <param name="str">Text of the plain text run.</param>
/// <param name="runIx">Current run index (to be stored in result).</param>
/// <param name="tokens">List of tokens to append to.</param>
private void tokenizeRun(string str, int runIx, List <EquivToken> tokens)
{
// One flag for each character.
// If -1, character is outside of any token (e.g., whitespace, punctuation)
// Otherwise, number indicates token index, from 0 upwards
int[] flags = new int[str.Length];
// At first, we assume entire text is a single token
for (int i = 0; i != flags.Length; ++i)
{
flags[i] = 0;
}
// Split by space and dash
int pos;
// Trim from start
for (pos = 0; pos != flags.Length; ++pos)
{
char c = str[pos];
if (c != ' ' && c != '-')
{
break;
}
flags[pos] = -1;
}
// Move on; when encountering ' ' or '-' again, segment
for (; pos != flags.Length; ++pos)
{
char c = str[pos];
// Space or dash here: mark as non-token; increase token IX of rest of string
if (c == ' ' || c == '-')
{
flags[pos] = -1;
for (int i = pos + 1; i < flags.Length; ++i)
{
++flags[i];
}
}
}
// Trim punctuation from start and end of each token
pos = 0;
while (pos != flags.Length)
{
// Skip non-tokens
if (flags[pos] == -1)
{
++pos; continue;
}
// Find end of token
int tokenStart = pos;
int tokenLength = 0;
for (int i = pos; i != flags.Length; ++i)
{
// Same token as long as index is the same
if (flags[i] == flags[pos])
{
++tokenLength;
}
else
{
break;
}
}
// We'll move on in input by length of this token
pos += tokenLength;
// Trim punctuation from this token
trimPunct(str, flags, tokenStart, tokenLength);
}
// We're done splitting and trimming, now create an EquivToken for each token.
pos = 0;
while (pos != flags.Length)
{
if (flags[pos] == -1)
{
++pos; continue;
}
// Find end of token
int tokenStart = pos;
int tokenLength = 0;
for (int i = pos; i != flags.Length; ++i)
{
// Same token as long as index is the same
if (flags[i] == flags[pos])
{
++tokenLength;
}
else
{
break;
}
}
pos += tokenLength;
// Text of this token, lower-cased, OR *num*
string strToken = str.Substring(tokenStart, tokenLength);
if (reNumbers.IsMatch(strToken))
{
strToken = WordHolder.TokenNum;
}
else
{
strToken = strToken.ToLowerInvariant();
}
int tokenId = wh.GetTokenId(strToken);
EquivToken eqt = new EquivToken
{
TokenId = tokenId,
RunIx = runIx,
StartInRun = tokenStart,
LengthInRun = tokenLength,
};
tokens.Add(eqt);
}
}
/// <summary>
/// Ctor: read from binary stream.
/// </summary>
public TokenizedSense(BinReader br)
{
EntryId = br.ReadInt();
SenseIx = br.ReadInt();
int equivTokenCount = br.ReadInt();
EquivTokens = new List<EquivToken>(equivTokenCount);
for (int i = 0; i != equivTokenCount; ++i)
{
EquivToken eqt = new EquivToken();
eqt.TokenId = br.ReadInt();
eqt.RunIx = (int)br.ReadByte();
eqt.StartInRun = (int)br.ReadShort();
eqt.LengthInRun = (int)br.ReadShort();
EquivTokens.Add(eqt);
}
}