Java StringSpan类代码示例

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
public Instance pipe(Instance carrier)
{
  StringTokenization ts =  (StringTokenization) carrier.getData();
  StringTokenization newTs = new StringTokenization((CharSequence) ts.getDocument ());
   final LabelAlphabet dict = (LabelAlphabet) getTargetAlphabet();
   LabelSequence labelSeq = new LabelSequence(dict);
   Label start = dict.lookupLabel ("start");
   Label notstart = dict.lookupLabel ("notstart");

  boolean lastWasSpace = true;
  StringBuffer sb = new StringBuffer();
  for (int i = 0; i < ts.size(); i++) {
    StringSpan t = (StringSpan) ts.getSpan(i);
    if (t.getText().equals(" "))
      lastWasSpace = true;
    else {
      sb.append(t.getText());
      newTs.add(t);
      labelSeq.add(lastWasSpace ? "start" : "notstart");
      lastWasSpace = false;
    }
  }
  if (isTargetProcessing())
    carrier.setTarget(labelSeq);
  carrier.setData(newTs);
  carrier.setSource(sb.toString());
  return carrier;
}
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
public Instance pipe (Instance carrier)
{
	CharSequence string = (CharSequence) carrier.getData();
	lexer.setCharSequence (string);
	TokenSequence ts = new StringTokenization (string);
	while (lexer.hasNext()) {
		lexer.next();
		ts.add (new StringSpan (string, lexer.getStartOffset (), lexer.getEndOffset ()));
	}
	carrier.setData(ts);
	return carrier;
}
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
public Instance pipe (Instance carrier)
{
  Object data = carrier.getData ();
  if (data instanceof Tokenization) {
    // we're done
  } else if (data instanceof TokenSequence) {
    StringBuffer buf = new StringBuffer ();
    TokenSequence ts = (TokenSequence) data;
    StringTokenization spans = new StringTokenization (buf);  // I can use a StringBuffer as the doc! Awesome!

    for (int i = 0; i < ts.size(); i++) {
      Token token = ts.get(i);

      int start = buf.length ();
      buf.append (token.getText());
      int end = buf.length();

      StringSpan span = new StringSpan (buf, start, end);
      span.setFeatures (token.getFeatures ());
      span.setProperties (token.getProperties ());

      spans.add (span);
      buf.append (" ");
    }

    carrier.setData (spans);
  } else {
    throw new IllegalArgumentException ("Can't convert "+data+" to Tokenization.");
  }

  return carrier;
}
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
public Instance pipe (Instance carrier)
{
	long millis=System.currentTimeMillis();
	CharSequence string = (CharSequence) carrier.getData();
	lexer.setCharSequence (string);
	TokenSequence ts = new StringTokenization (string);
	while (lexer.hasNext()) {
		lexer.next();
		ts.add (new StringSpan (string, lexer.getStartOffset (), lexer.getEndOffset ()));
	}
	
	carrier.setData(ts);
	//System.out.println(this.getClass().getCanonicalName() + "----" +(System.currentTimeMillis()-millis));
	return carrier;
}
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
private TokenSequence stem(TokenSequence tokenSequence) {

    PorterStemmer stemmer = new PorterStemmer();
    StringIterator text = new StringIterator("");
    Iterator<Token> tokens = tokenSequence.iterator();

    while (tokens.hasNext()) {

      Token token = tokens.next();
      if (token == null || !(token instanceof StringSpan)) {
        continue;
      }

      text.reset(token.getText());
      while (!text.isEndOfText()) {

        char c = text.peek();
        if (!Character.isLetter(c)) {
          break;
        }

        stemmer.add(c);
        text.moveAhead();
      }

      stemmer.stem();
      token.setText(stemmer.toString());
    }
    return tokenSequence;
  }
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
public Instance pipe (Instance carrier)
{
  String input;
  if (carrier.getData () instanceof CharSequence) {
    input = String.valueOf(carrier.getData ());
  } else {
    throw new ClassCastException("Needed a String; got "+carrier.getData());
  }
  
  String[] lines = input.split ("\n");

  StringSpan[] spans = new StringSpan[lines.length];
  Labels[] lbls = new Labels[lines.length];
  StringBuffer buf = new StringBuffer ();

  Alphabet dict = getDataAlphabet ();

  for (int i = 0; i < lines.length; i++) {
    String line = lines[i];
    String[] toks = line.split ("\\s+");

    int j = 0;
    ArrayList thisLabels = new ArrayList ();
    if (!labelsAtEnd) {
      while (!isLabelSeparator (toks, j)) {
        thisLabels.add (labelForTok (toks[j], j));
        j++;
      }
      if ((j < toks.length) && toks[j].equals ("----")) j++;
      lbls[i] = new Labels ((Label[]) thisLabels.toArray (new Label[thisLabels.size ()]));
    }

    int maxFeatureIdx = (labelsAtEnd) ? toks.length - numLabels : toks.length;

    String text = "*???*";
    if (featuresIncludeToken) {
      if (j < maxFeatureIdx) {
        text = toks [j++];
      }
    }

    int start = buf.length ();
    buf.append (text);
    int end = buf.length ();
    buf.append (" ");

    StringSpan span = new StringSpan (buf, start, end);

    while (j < maxFeatureIdx) {
      span.setFeatureValue (toks[j].intern (), 1.0);
      j++;
    }

    if (includeTokenText) {
      span.setFeatureValue ((textFeaturePrefix+text).intern(), 1.0);
    }

    if (labelsAtEnd) {
      int firstLblIdx = j;
      while (j < toks.length) {
        thisLabels.add (labelForTok (toks[j], j - firstLblIdx));
        j++;
      }
      lbls[i] = new Labels ((Label[]) thisLabels.toArray (new Label[thisLabels.size ()]));
    }

    spans[i] = span;

  }

  StringTokenization tokenization = new StringTokenization (buf);
  tokenization.addAll (spans);
  carrier.setData (tokenization);

  carrier.setTarget (new LabelsAssignment (new LabelsSequence (lbls)));
  return carrier;
}
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
public Instance pipe (Instance carrier)
{
   CharSequence string = (CharSequence) carrier.getData();
	StringTokenization dataTokens = new StringTokenization (string);
	TokenSequence targetTokens = new TokenSequence ();
	String tag = backgroundTag;
	String nextTag = backgroundTag;
	Matcher m = sgmlPattern.matcher (string);
	int textStart = 0;
	int textEnd = 0;
	int nextStart = 0;
	boolean done = false;

	logger.fine(sgmlPattern.pattern());
	logger.finer(string.toString());

	while (!done) {
		done = !(m.find());
		if (done)
			textEnd = string.length(); // culotta: changed from string.length()-1 
		else {
			String sgml = m.group();
			logger.finer ("SGML = "+sgml);

			int groupCount = m.groupCount();
			logger.finer(Integer.toString (groupCount));

			if (sgml.charAt(1) == '/')
				nextTag = backgroundTag;
			else{
				//nextTag = m.group(0);
				nextTag = sgml.substring(1, sgml.length()-1);
			}
			logger.finer("nextTag: " + nextTag);

			nextStart = m.end();  // m.end returns one beyond index of last match char
			textEnd = m.start();  // String.subtring does not include index end
			logger.finer ("Text start/end "+textStart+" "+textEnd);
		}
		if (textEnd - textStart > 0) {
			logger.finer ("Tag = "+tag);
			logger.finer ("Target = "+string.subSequence (textStart, textEnd));
			lexer.setCharSequence (string.subSequence (textStart, textEnd));
			while (lexer.hasNext()) {
         lexer.next ();
         int tokStart = textStart + lexer.getStartOffset ();
         int tokEnd = textStart + lexer.getEndOffset ();
         dataTokens.add (new StringSpan (string, tokStart, tokEnd));
				targetTokens.add (new Token (tag));
			}
		}
		textStart = nextStart;
		tag = nextTag;
	}
	carrier.setData(dataTokens);
	carrier.setTarget(targetTokens);

   if (saveSource) {
     carrier.setSource(dataTokens);
   }

	return carrier;
}
 

import cc.mallet.extract.StringSpan; //导入依赖的package包/类
/**
  * Takes an instance with data of type String or String[][] and creates
  * an Instance of type StringTokenization.  Each Token in the sequence is
  * gets the test of the line preceding it and once feature of value 1
  * for each "Feature" in the line.  For example, if the String[][] is
  * {{a,b},{c,d,e}} (and target processing is off) then the text would be
  * "a b" for the first token and "c d e" for the second.  Also, the
  * features "a" and "b" would be set for the first token and "c", "d" and
  * "e"  for the second.  The last element in the String[] for the current
  * token is taken as the target (label), so in the previous example "b"
  * would have been the label of the first sequence.
  */
 public Instance pipe(Instance carrier) {
	Object inputData = carrier.getData();
	LabelAlphabet labels;
	LabelSequence target = null;
	String[][] tokens;
	StringBuffer source = new StringBuffer();
	StringTokenization ts = new StringTokenization(source);
	if (inputData instanceof String)
		tokens = parseSentence((String) inputData);
	else if (inputData instanceof String[][])
		tokens = (String[][]) inputData;
	else
		throw new IllegalArgumentException("Not a String; got " + inputData);
	if (isTargetProcessing()) {
		labels = (LabelAlphabet) getTargetAlphabet();
		target = new LabelSequence(labels, tokens.length);
	}
	for (int l = 0; l < tokens.length; l++) {
		int nFeatures;
		if (isTargetProcessing()) {
			if (tokens[l].length < 1)
				throw new IllegalStateException("Missing label at line "
						+ l + " instance " + carrier.getName());
			nFeatures = tokens[l].length - 1;
			target.add(tokens[l][nFeatures]);
		} else
			nFeatures = tokens[l].length;
		int start = source.length();
		String word = makeText(tokens[l]);
		source.append(word + " ");
		Token tok = new StringSpan(source, start, source.length() - 1);
		if (setTokensAsFeatures) {
			for (int f = 0; f < nFeatures; f++)
				tok.setFeatureValue(tokens[l][f], 1.0);
		} else {
			for (int f = 1; f < nFeatures; f++)
				tok.setFeatureValue(tokens[l][f], 1.0);
		}
		ts.add(tok);
	}
	carrier.setData(ts);
	if (isTargetProcessing())
		carrier.setTarget(target);
	return carrier;
}