labeledspan.java

来自「mallet是自然语言处理、机器学习领域的一个开源项目。」· Java 代码 · 共 103 行

/* Copyright (C) 2003 Univ. of Massachusetts Amherst, Computer Science Dept.
   This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
   http://www.cs.umass.edu/~mccallum/mallet
   This software is provided under the terms of the Common Public License,
   version 1.0, as published by http://www.opensource.org.  For further
   information, see the file `LICENSE' included with this distribution. */
package edu.umass.cs.mallet.base.extract;

import edu.umass.cs.mallet.base.types.Label;

/**
 * Created: Oct 12, 2004
 *
 * @author <A HREF="mailto:[e-mail]>[e-mail]</A>
 * @version $Id: LabeledSpan.java,v 1.5 2005/11/08 23:03:50 culotta Exp $
 */
//xxx Maybe this is the same thing as a field??
public class LabeledSpan implements Span {

  private Span span;
  private Label label;
  private boolean isBackground;
  private double confidence;


  public LabeledSpan (Span span, Label label, boolean isBackground) {
    this (span, label, isBackground, 1.0);
  }

  public LabeledSpan (Span span, Label label, boolean isBackground, double confidence) {
    this.span = span;
    this.label = label;
    this.isBackground = isBackground;
    this.confidence = confidence;
  }


  public Span getSpan () { return span; }

  public Label getLabel () { return label; }


  public String getText ()
  {
    return span.getText ();
  }

  public Object getDocument ()
  {
    return span.getDocument ();
  }

  public double getConfidence ()
  {
    return confidence;
  }

  void setConfidence (double c)
  {
    this.confidence = c;
  }

  public boolean intersects (Span r)
  {
    return span.intersects (r);
  }


  public boolean isSubspan (Span r)
  {
    return span.isSubspan (r);
  }

  public Span intersection (Span r)
  {
    LabeledSpan other = (LabeledSpan) r;
    Span newSpan = getSpan ().intersection (other.getSpan ());
    return new LabeledSpan (newSpan, label, isBackground, confidence);
  }

  public int getEndIdx ()
  {
    return span.getEndIdx ();
  }


  public int getStartIdx ()
  {
    return span.getStartIdx ();
  }


  public boolean isBackground ()
  {
    return isBackground;
  }

  public String toString ()
  {
    return label.toString ()+" [span "+getStartIdx ()+".."+getEndIdx ()+" confidence="+confidence+"]";
  }
}