Difference between revisions of "Object Oriented Programming"

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<php>
+
<java> /*
// Example 1
 
$pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
 
$pieces = explode(" ", $pizza);
 
echo $pieces[0]; // piece1
 
echo $pieces[1]; // piece2
 
</php>
 
  
I am involved on the development of a new extension, this one is very simple (like the others one) and its intended to HIGHLIGHT Syntax on code posted at the wiki. The extension will use enscript (available on all linuxes) and will put colour to the code , and them will put it under "pre" tags.
+
* Algernon - a rule-based inference engine in Java.
 
+
* http://algernon-j.sourceforge.net/
The CVS location of the code is :
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*
http://www.wickle.com/horde/cvs/cvs.php/mediawikiextensions
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* This example shows how to open a Protege knowledge base
 
+
* in Java and use Algernon to query the KB.
== Requisites ==
+
*
There r no good programs without little requirements ;)
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* To run it, be sure to change the path in NEWSPAPER_PROJECT
The only one is [http://www.gnu.org/software/enscript/enscript.html enscript]
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* to match the correct project on your system.
 
+
*
I am using 1.6.1 but i tested sucesfully under last version 1.6.4
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* Micheal Hewett
+
* 05 May 2004
== Download ==
+
* hewett@cs.stanford.edu
*Download the extension from my [http://www.wickle.com/cvs/mediawikiextensions CVS] at wickle
+
*/
*Alternate Download at SF.net : [http://cvs.sourceforge.net/viewcvs.py/mwextensions/mediawikiextensions/ SF.net CVS]
 
 
 
== Install instructions ==
 
you must copy SyntaxHighlight.php to $mediawiki/extensions directory and add this line to LocalSettings.php:
 
include("extensions/SyntaxHighlight.php");
 
 
 
Also you must set $wgSyntaxSettings->dotCommand = "/usr/bin/enscript";
 
to accomplish your installation of SyntaxHighlight.
 
 
 
 
 
== Using it ==
 
 
 
To use , the only thing you must do are put the code between <pre><code> and </code></pre> tags. And inside this tags you must put one tag indicating the
 
language used (for example <perl/>,<sh/>,<java/>)
 
 
 
== Samples ==
 
 
 
 
 
=== Perl ===
 
<code>
 
<perl/>
 
#!/usr/local/bin/perl5.8.2
 
#envia un correo a account_for_backups@gmail.com como usuario wickle con el backup de las
 
#ultimas base de datos de wickle y con el label Backup
 
#Usa Mail::Webmail::Gmail en #http://search.cpan.org/dist/Mail-Webmail-Gmail/lib/Mail/Webmail/Gmail.pm
 
#Syntax ./send_gmail.pl file_to_backup.tar.gz
 
 
 
use Mail::Webmail::Gmail;
 
 
 
my $backup_label="Backups";
 
my $file_to_backup=$ARGV[0];
 
my $mail_to_backup="account_for_backups@gmail.com";
 
my $now = localtime time;
 
print "It is now $now.\nfile to backup: $file_to_backup\n";
 
my ( $gmail ) = Mail::Webmail::Gmail->new(
 
            username => 'mygmailaccount', password => 'mypassword', );
 
    my $msgid = $gmail->send_message( to => 'account_for_backups@gmail.com', subject => 'Backup bases de datos '. $now, msgbody => 'Backup del dia '.$now. ' realizado', file0 => [$file_to_backup] );
 
    print "Msgid: $msgid\n";
 
    if ( $msgid ) {
 
        if ( $gmail->error() ) {
 
            print $gmail->error_msg();
 
        } else {
 
                ### Add this label to our new message ###
 
                $gmail->edit_labels( label => $backup_label, action => 'add', 'msgid' => $msgid );
 
                if ( $gmail->error() ) {
 
                    print $gmail->error_msg();
 
                } else {
 
                    print "Added label: $backup_label to message $msgid\n";
 
                }
 
        }
 
    }
 
</code>
 
 
 
 
 
=== bash ===
 
<code>
 
<sh/>
 
#!/bin/bash
 
#Getting some variables
 
FULLPATH=`dirname $1`;
 
BASE=`basename $1`;
 
# Needs an argument
 
if [ $# -eq 0 ] ; then
 
  # no argument given, print usage
 
  echo "start control version on configuration file";
 
  echo "use: $0 file";
 
else
 
  # check if RCS directory exist or create it
 
  if [ -d $FULLPATH/RCS ] ; then
 
    echo "revisions directory existent ...";
 
  else
 
    mkdir $FULLPATH/RCS
 
  fi
 
 
 
  # Things to do when a RCS file exist
 
  if [ -e $FULLPATH/RCS/$BASE,v ] ; then
 
    echo "File exist. Checking for differences ..."
 
    # Check if there is any differences
 
    if ! rcsdiff $1; then
 
      echo "==================================="
 
      echo "WARNING: changes have been made to $1 and are not in the repository. Carefully look at the diff above, comment them below for committing or CTRL+C to abort."
 
      # Lock file
 
      /usr/bin/rcs -l $1
 
      if ! /usr/bin/ci -u $1; then
 
        echo "Error when commiting. Aborting"
 
        exit
 
      fi
 
    fi
 
    echo "==================================="
 
    echo "Getting lastest revision and locking it ..."
 
    /usr/bin/co -l $1
 
  fi
 
 
 
  echo "Launching editor ..."
 
  vim $1
 
  # changes made, commit them to the repository unlocked
 
  /usr/bin/ci -u $1
 
  exit
 
fi
 
</code>
 
 
 
 
 
=== Java ===
 
 
 
<code>
 
<java/>
 
/*
 
* Algernon - a rule-based inference engine in Java.
 
* http://algernon-j.sourceforge.net/
 
*
 
* This example shows how to open a Protege knowledge base
 
* in Java and use Algernon to query the KB.
 
*
 
* To run it, be sure to change the path in NEWSPAPER_PROJECT
 
* to match the correct project on your system.
 
*
 
* Micheal Hewett
 
* 05 May 2004
 
* hewett@cs.stanford.edu
 
*/
 
  
 
package org.algernon.test;
 
package org.algernon.test;
  
import java.util.*;
+
import java.util.*;  
 
+
</java>
import org.algernon.Algernon;
 
import org.algernon.util.ErrorSet;
 
import org.algernon.datatype.Result;
 
import org.algernon.datatype.BindingList;
 
import org.algernon.kb.okbc.protege.AlgernonProtegeKB;
 
import org.algernon.kb.AlgernonKB;
 
 
 
 
 
// date created: Wed Aug 14 11:02:44 2002
 
/**
 
* Opens the Protege newspaper KB and makes some simple queries on it.
 
*
 
* Example:
 
*
 
 
 
* java -classpath algernon.jar:protege.jar org.algernon.test.SimpleAlgernonExample
 
*
 
 
 
 
 
* @see org.algernon.Algernon
 
* @author  Micheal S. Hewett    hewett@smi.stanford.edu
 
*
 
*/
 
public class SimpleAlgernonExample extends Object
 
{
 
  public static String    NEWSPAPER_PROJECT = "/Applications/Protege_2.0/examples/newspaper/newspaper.pprj";
 
 
 
  protected Algernon  f_algy        = null;  // Algernon instance
 
  protected AlgernonKB f_kb          = null;
 
  protected String    f_projectFile = "";
 
 
 
 
 
 
 
  // date created: Wed Aug 14 11:02:44 2002
 
  // created by:  Micheal S. Hewett    hewett@smi.stanford.edu
 
  public SimpleAlgernonExample()
 
  {
 
    f_projectFile = NEWSPAPER_PROJECT;
 
  }
 
 
 
  public SimpleAlgernonExample(String project)
 
  {
 
    f_projectFile = project;
 
  }
 
 
 
 
 
  /**
 
  * Opens the KB and initializes Algernon.
 
  */
 
  public void init()
 
  {
 
    try {
 
      f_algy = new Algernon();
 
      f_kb  = new AlgernonProtegeKB(f_algy, f_projectFile);
 
      f_algy.addKB(f_kb);
 
    }
 
    catch (Exception e) {
 
      System.err.println(e + "\nUnable to open the '" + f_projectFile + "' KB.");
 
      stop();
 
    }
 
 
 
  }
 
 
 
 
 
  /**
 
    * Halts the program nicely.
 
    */
 
  public void stop()
 
  {
 
    if (f_kb != null)
 
      f_kb.close();
 
  }
 
 
 
  public static void main(String[] args)
 
  {
 
    SimpleAlgernonExample example = new SimpleAlgernonExample(NEWSPAPER_PROJECT);
 
    example.init();
 
    example.start();
 
  }
 
 
 
  public void start()
 
  {
 
 
 
    try {
 
      // Example that retrieves all bindings of the variable ?X.
 
      // Note that the variable names are case-sensitive:
 
 
 
      ErrorSet errors = new ErrorSet();
 
      String  query  = "((:instance Author ?a)(name ?a ?name))";
 
 
 
      Result result = (Result)f_algy.ask(query, errors);
 
 
 
      if (result == null)
 
      {
 
        System.err.println("Errors during ask of '" + query + "'");
 
        System.err.println(errors.toString());
 
      }
 
      else
 
      {
 
        // One way to access the results is to iterate on the results
 
        // using result.iterator().  Each element of the iterator
 
        // is of type BindingList.
 
        for (Iterator iterator = result.iterator();
 
            iterator.hasNext();)
 
        {
 
          // Result contains some BindingList objects.
 
          BindingList bl = (BindingList) iterator.next();
 
 
 
          // The bound object will either be a Java Object (Integer, Float, etc.)
 
          // or a KB object (typically a Protege Instance).
 
          // If you want Algernon objects, use algy.getAlgernonBinding().
 
          Object author = f_algy.getBinding("?a",    bl);
 
          Object name  = f_algy.getBinding("?name", bl);
 
 
 
          System.out.println("Author: " + author + ",  name: " + name);
 
 
 
          // If for some reason you don't know the names of the variables
 
          // in the Binding Lists, you can iterate on the BindingList to
 
          // retrieve variable names and values. See the JavaDoc documentation
 
          // for the BindingList api.
 
        }
 
 
 
        // A simpler way to show the results is to let Algernon print the results:
 
        System.out.println(f_algy.printResultToString("ask", result));
 
 
 
        }
 
    } catch (Exception e) {
 
      System.err.println("Error running Algernon: " + e);
 
      e.printStackTrace();
 
    } finally {
 
      stop();
 
    }
 
  }
 
 
 
}
 
</code>
 
 
 
 
 
 
 
[[Category:PHP]]
 
[[Category:Mediawiki Extensions]]
 

Revision as of 06:28, 6 January 2006

<java> /*

  • Algernon - a rule-based inference engine in Java.
  • http://algernon-j.sourceforge.net/
  • This example shows how to open a Protege knowledge base
  • in Java and use Algernon to query the KB.
  • To run it, be sure to change the path in NEWSPAPER_PROJECT
  • to match the correct project on your system.
  • Micheal Hewett
  • 05 May 2004
  • hewett@cs.stanford.edu
  • /

package org.algernon.test;

import java.util.*; </java>