Class for checking syntax and comments for the assert : Assert « Language Basics « Java

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2. Language Basics
3. Assert

Class for checking syntax and comments for the assert

  
/*
 *     file: Assertions.java
 *  package: oreilly.hcj.review
 *
 * This software is granted under the terms of the Common Public License,
 * CPL, which may be found at the following URL:
 * http://www-124.ibm.com/developerworks/oss/CPLv1.0.htm
 *
 * Copyright(c) 2003-2005 by the authors indicated in the @author tags.
 * All Rights are Reserved by the various authors.
 *
########## DO NOT EDIT ABOVE THIS LINE ########## */


import java.awt.event.MouseEvent;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;

/**  
 * Class for checking syntax and comments for the assert section of the review chapter.
 *
 * @author <a href="mailto:kraythe@arcor.de">Robert (Kraythe) Simmons jr.</a>
 */
public class Assertions {
  /** 
   * Main method.
   *
   * @param args Command line arguments.
   */
  public static void main(final String[] args) {
    helperParseArgs(args);
    Iterator iter = System.getProperties()
                        .keySet()
                        .iterator();
    for (String key = null; iter.hasNext(); key = (String)iter.next()) {
      assert (key != null);
      System.out.println(key + "=" + System.getProperty(key));
    }
  }

  /** 
   * __UNDOCUMENTED__
   *
   * @param event __UNDOCUMENTED__
   */
  public void mouseClicked(final MouseEvent event) {
    Object source = event.getSource();
    assert (source != null);

    // ... do code using source
  }

  /** 
   * __UNDOCUMENTED__
   *
   * @param args __UNDOCUMENTED__
   *
   * @throws IllegalArgumentException __UNDOCUMENTED__
   */
  protected static void helperParseArgs(final String[] args) {
    assert (args != null);
    assert (!Arrays.asList(args)
                   .contains(null));
    // --
    List arglist = Arrays.asList(args);
    Iterator iter = arglist.iterator();
    for (String argument = null; iter.hasNext(); argument = (String)iter.next()) {
      if (argument.startsWith("-D")) {
        if (argument.length() < 3) {
          int idx = arglist.indexOf(argument);
          throw new IllegalArgumentException("Argument" + idx
                                             + " is not a legal property argument.");
        }
        int valueIdx = argument.indexOf('=');
        System.setProperty(argument.substring(2, valueIdx),
                           argument.substring(valueIdx + 1));
        assert (System.getProperty(argument.substring(2, valueIdx)).equals(argument
                                                                           .substring(valueIdx
                                                                                      + 1)));
      }
    }
  }

  /** 
   * __UNDOCUMENTED__
   *
   * @param args __UNDOCUMENTED__
   *
   * @throws IllegalArgumentException __UNDOCUMENTED__
   */
  protected static void helperParseArgs2(final String[] args) {
    assert (args != null);
    assert (!Arrays.asList(args)
                   .contains(null));
    // --
    List arglist = Arrays.asList(args);
    Iterator iter = arglist.iterator();
    for (String argument = null; iter.hasNext(); argument = (String)iter.next()) {
      if (argument.startsWith("-D")) {
        if (argument.length() < 3) {
          int idx = arglist.indexOf(argument);
          throw new IllegalArgumentException("Argument" + idx
                                             + " is not a legal property argument.");
        }
        int valueIdx = argument.indexOf('=');
        String key = argument.substring(2, valueIdx);
        String value = argument.substring(valueIdx + 1);
        System.setProperty(key, value);
        assert (System.getProperty(key).equals(value));
      }
    }
  }
}

/* ########## End of File ########## */

   
    
  

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