Logo
Distributed Genetic Programming Framework
print print

File org.sfc.scoped.DefaultReferenceCounted.java

Here you can find all the information about the file org.sfc.scoped.DefaultReferenceCounted.java. You may explore it here or download it onto your local disk.
/*
 * Copyright (c) 2005 Thomas Weise
 * 
 * E-Mail           : tweise@gmx.de
 * Creation Date    : 2005-06-19 13:30:13
 * Original Filename: org.sfc.DefaultReferenceCounted.java
 * Version          : 1.0.2
 * Last modification: 2006-03-07
 *                by: Thomas Weise
 * 
 * License          : GNU LESSER GENERAL PUBLIC LICENSE
 *                    Version 2.1, February 1999
 *                    You should have received a copy of this license along
 *                    with this library; if not, write to the Free Software
 *                    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *                    MA 02111-1307, USA or download the license under
 *                    http://www.gnu.org/copyleft/lesser.html.
 *                    
 * Warranty         : This software is provided "as is" without any
 *                    warranty; without even the implied warranty of
 *                    merchantability or fitness for a particular purpose.
 *                    See the Gnu Lesser General Public License for more
 *                    details.
 */

 
package org.sfc.scoped;

/**
 * This class implements an default reference counting mechanism.
 * 
 * @author Thomas Weise 
 */

public class DefaultReferenceCounted  extends     Scoped
                                      implements  IReferenceCounted
  {
/**
 * The internal reference counter.
 */

  private       int     m_ref_count ;
  
  
/**
 * Create a new instance of the default base of reference counted objects.
 */

  public  DefaultReferenceCounted ()
    {
    super();
    this.m_ref_count      = 1;
    }
  
  
  
/**
 * Increase the reference counter of this object by one.
 * You must call <code>add_ref</code> before you assign a variable to point
 * on this object (except when calling the constructor and storing the
 * result to exactly one variable).
 * @throws AlreadyDisposedException If the object has already been disposed.
 */

  public  synchronized  void  add_ref ()  throws AlreadyDisposedException
    {
    if(this.m_living)
      {
      this.m_ref_count++;
      }
    else
      {
      throw new AlreadyDisposedException();
      }
    }
  
/**
 * Decrease the reference counter of this object by one.
 * If the reference count reaches zero, the object will automatically
 * perform cleanup operations. You must call <code>release</code> whenever
 * you don't need a variable pointing to this object anymore.
 * @throws AlreadyDisposedException If the object has already been disposed.
 */

  public  synchronized  void  release ()  throws AlreadyDisposedException
    {
    if(this.m_living)
      {        
      if( (--this.m_ref_count) <= 0)
        {
        this.m_living = false;
        dispose();
        }
      }
    else
      {
      throw new AlreadyDisposedException();
      }
    }
    
  
/**
 * Creates and returns a copy of this object.
 * This copy will have a reference-count of one. You must call
 * <code>release</code> on that copy when you're finished with it.
 * You cannot assume the copy's reference count being linked in any way
 * with this object's one.
 * @return  An exact copy of this object.
 * 
 * @throws  CloneNotSupportedException  If the object doesn't implement the
 *                                      <code>Cloneable</code> interface.
 */

    @Override
  protected synchronized Object  clone() throws  CloneNotSupportedException
    {
    DefaultReferenceCounted  l_o;
    
    l_o             = ((DefaultReferenceCounted)(super.clone()));
    l_o.m_ref_count = 1;
    return l_o;
    }
  }

File Information:

file name:DefaultReferenceCounted.java
package:org.sfc.scoped
qualified name:org.sfc.scoped.DefaultReferenceCounted.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/sfc/scoped/DefaultReferenceCounted.java
size:3.592 KB (3679 B)
uploaded: 2015-07-22 04:11:13 GMT+0000
last update: 2006-03-07 04:20:28 GMT+0000
last access: 2018-01-23 15:36:41 GMT+0000

statistics online since 2006-01-02.   RSS Feed
Contact us by sending an email to tweise@gmx.de to receive further information, to report errors, or to join our project.
All content on this site (http://dgpf.sourceforge.net/) is LGPL-licensed.
http://dgpf.sourceforge.net/scripts/source/source.php last modified at 2015-07-22 04:10:53 GMT+0000 served at 2018-01-23 15:36:41 GMT+0000.
Valid CSS Valid XHTML 1.1
Valid RSS SourceForge.net Logo