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• OptionHandlerJavadoc.java

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weka.core.OptionHandlerJavadoc Maven / Gradle / Ivy

/*
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see .
 */

/*
 * OptionHandlerJavadoc.java
 * Copyright (C) 2006-2012,2015 University of Waikato, Hamilton, New Zealand
 */

package weka.core;

import java.util.Collections;
import java.util.Enumeration;
import java.util.Vector;

/**
 * Generates Javadoc comments from the OptionHandler's options. Can
 * automatically update the option comments if they're surrounded by the
 * OPTIONS_STARTTAG and OPTIONS_ENDTAG (the indention is determined via the
 * OPTIONS_STARTTAG).
 * 

 * 
 *  Valid options are:
 * 

 * 
 * 
 * -W <classname>
 *  The class to load.
 * 
 * 
 * 
 * -nostars
 *  Suppresses the '*' in the Javadoc.
 * 
 * 
 * 
 * -dir <dir>
 *  The directory above the package hierarchy of the class.
 * 
 * 
 * 
 * -silent
 *  Suppresses printing in the console.
 * 
 * 
 * 
 * -noprolog
 *  Suppresses the 'Valid options are...' prolog in the Javadoc.
 * 
 * 
 * 
 * 
 * @author fracpete (fracpete at waikato dot ac dot nz)
 * @version $Revision: 11734 $
 * @see #OPTIONS_STARTTAG
 * @see #OPTIONS_ENDTAG
 */
public class OptionHandlerJavadoc extends Javadoc {

  /** the start comment tag for inserting the generated Javadoc */
  public final static String OPTIONS_STARTTAG = "";

  /** the end comment tag for inserting the generated Javadoc */
  public final static String OPTIONS_ENDTAG = "";

  /** whether to include the "Valid options..." prolog in the Javadoc */
  protected boolean m_Prolog = true;

  /**
   * default constructor
   */
  public OptionHandlerJavadoc() {
    super();

    m_StartTag = new String[1];
    m_EndTag = new String[1];
    m_StartTag[0] = OPTIONS_STARTTAG;
    m_EndTag[0] = OPTIONS_ENDTAG;
  }

  /**
   * Returns an enumeration describing the available options.
   * 
   * @return an enumeration of all the available options.
   */
  @Override
  public Enumeration listOptions() {
    Vector result = new Vector();

    result.addAll(Collections.list(super.listOptions()));

    result.addElement(new Option(
      "\tSuppresses the 'Valid options are...' prolog in the Javadoc.",
      "noprolog", 0, "-noprolog"));

    return result.elements();
  }

  /**
   * Parses a given list of options.
   * 
   * @param options the list of options as an array of strings
   * @throws Exception if an option is not supported
   */
  @Override
  public void setOptions(String[] options) throws Exception {
    super.setOptions(options);

    setProlog(!Utils.getFlag("noprolog", options));
  }

  /**
   * Gets the current settings of this object.
   * 
   * @return an array of strings suitable for passing to setOptions
   */
  @Override
  public String[] getOptions() {
    Vector result = new Vector();

    Collections.addAll(result, super.getOptions());

    if (!getProlog()) {
      result.add("-noprolog");
    }

    return result.toArray(new String[result.size()]);
  }

  /**
   * sets whether to add the "Valid options are..." prolog
   * 
   * @param value true if the prolog is to be added
   */
  public void setProlog(boolean value) {
    m_Prolog = value;
  }

  /**
   * whether "Valid options are..." prolog is included in the Javadoc
   * 
   * @return true if the prolog is printed
   */
  public boolean getProlog() {
    return m_Prolog;
  }

  /**
   * generates and returns the Javadoc for the specified start/end tag pair.
   * 
   * @param index the index in the start/end tag array
   * @return the generated Javadoc
   * @throws Exception in case the generation fails
   */
  @Override
  protected String generateJavadoc(int index) throws Exception {
    String result;
    OptionHandler handler;
    String optionStr;

    result = "";

    if (index == 0) {
      if (!canInstantiateClass()) {
        return result;
      }

      if (!ClassDiscovery.hasInterface(OptionHandler.class, getInstance()
        .getClass())) {
        throw new Exception("Class '" + getClassname()
          + "' is not an OptionHandler!");
      }

      // any options at all?
      handler = (OptionHandler) getInstance();
      Enumeration enm = handler.listOptions();
      if (!enm.hasMoreElements()) {
        return result;
      }

      // prolog?
      if (getProlog()) {
        result = "Valid options are: 
\n\n";
      }

      // options
      enm = handler.listOptions();
      while (enm.hasMoreElements()) {
        Option option = enm.nextElement();
        optionStr = toHTML(option.synopsis()) + "\n"
          + toHTML(option.description().replaceAll("\\t", " "));
        result += "
 " + optionStr.replaceAll("
", "") + "
\n\n";
      }

      // stars?
      if (getUseStars()) {
        result = indent(result, 1, "* ");
      }
    }

    return result;
  }

  /**
   * Returns the revision string.
   * 
   * @return the revision
   */
  @Override
  public String getRevision() {
    return RevisionUtils.extract("$Revision: 11734 $");
  }

  /**
   * Parses the given commandline parameters and generates the Javadoc.
   * 
   * @param args the commandline parameters for the object
   */
  public static void main(String[] args) {
    runJavadoc(new OptionHandlerJavadoc(), args);
  }
}