Examples of edu.stanford.nlp.ling.Label

edu.stanford.nlp.ling.Label
Something that implements the Label interface can act as a constituent, node, or word label with linguistic attributes. A Label is required to have a "primary" String value() (although this may be null). This is referred to as its value.
Implementations of Label split into two groups with respect to equality. Classes that extend ValueLabel define equality solely in terms of String equality of its value (secondary facets may be present but are ignored for purposes of equality), and have equals and compareTo defined across all subclasses of ValueLabel. This behavior should not be changed. Other classes that implement Label define equality only with their own type and require all fields of the type to be equal.
A subclass that extends another Label class should override the definition of labelFactory(), since the contract for this method is that it should return a factory for labels of the exact same object type. @author Christopher Manning

      Constituent c = (Constituent) obj;
      // System.out.println("Comparing " + this + " to " + c + "\n  " +
      //  "start: " + (start() == c.start()) + " end: " +
      //  (end() == c.end()) + " score: " + (score() == c.score()));
      if ((start() == c.start()) && (end() == c.end())) {
        Label lab1 = label();
        Label lab2 = c.label();
        if (lab1 == null) {
          return lab2 == null;
        }


        String lv1 = lab1.value();
        String lv2 = lab2.value();
        if (lv1 == null && lv2 == null) {
          return true;
        }
        if (lv1  != null && lv2 != null) {
          return lab1.value().equals(lab2.value());
        }
      }
    }
    return false;
  }

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   * @return the integer hashCode
   */
  @Override
  public int hashCode() {
    int hash = (start() << 16) | end();
    Label lab = label();
    return (lab == null || lab.value() == null) ? hash : hash ^ lab.value().hashCode();
  }

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   * Return the value of the label (or null if none).
   *
   * @return String the value for the label
   */
  public String value() {
    Label lab = label();
    if (lab == null) {
      return null;
    }
    return lab.value();
  }

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   * Set the value for the label (if one is stored).
   *
   * @param value The value for the label
   */
  public void setValue(String value) {
    Label lab = label();
    if (lab != null) {
      lab.setValue(value);
    }
  }

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   *
   * @param labelStr the String that translates into the content of the
   *                 label
   */
  public void setFromString(String labelStr) {
    Label lab = label();
    if (lab != null) {
      lab.setFromString(labelStr);
    }
  }

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   *
   * @param tree The tree node
   * @return The vector (distributed representation) of the given tree
   */
  public static SimpleMatrix getNodeVector(Tree tree) {
    Label label = tree.label();
    if (!(label instanceof CoreLabel)) {
      throw new IllegalArgumentException("CoreLabels required to get the attached node vector");
    }
    return ((CoreLabel) label).get(NodeVector.class);
  }

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      return SimpleMatrix.class;
    }
  }


  public static SimpleMatrix getPredictions(Tree tree) {
    Label label = tree.label();
    if (!(label instanceof CoreLabel)) {
      throw new IllegalArgumentException("CoreLabels required to get the attached predictions");
    }
    return ((CoreLabel) label).get(Predictions.class);
  }

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      return Integer.class;
    }
  }


  public static int getPredictedClass(Tree tree) {
    Label label = tree.label();
    if (!(label instanceof CoreLabel)) {
      throw new IllegalArgumentException("CoreLabels required to get the attached predicted class");
    }
    return ((CoreLabel) label).get(PredictedClass.class);
  }

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      return Integer.class;
    }
  }


  public static int getGoldClass(Tree tree) {
    Label label = tree.label();
    if (!(label instanceof CoreLabel)) {
      throw new IllegalArgumentException("CoreLabels required to get the attached gold class");
    }
    return ((CoreLabel) label).get(GoldClass.class);
  }

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    }
    return ((CoreLabel) label).get(GoldClass.class);
  }


  public static void setGoldClass(Tree tree, int goldClass) {
    Label label = tree.label();
    if (!(label instanceof CoreLabel)) {
      throw new IllegalArgumentException("CoreLabels required to set the attached gold class");
    }
    ((CoreLabel) label).set(GoldClass.class, goldClass);
  }

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