/*
 * Created on Sep 21, 2004 Copyright (C) 2001-4, Anthony Harrison anh23@pitt.edu
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version. This library 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 Lesser
 * General Public License for more details. You should have received a copy of
 * the GNU Lesser General Public License along with this library; if not, write
 * to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307 USA
 */
package org.jactr.core.slot;


/**
 * @author harrison TODO To change the template for this generated type comment
 *         go to Window - Preferences - Java - Code Style - Code Templates
 */
public class DefaultMutableSlot extends BasicSlot implements IMutableSlot
{

  /**
   * @param name
   * @param value
   */
  public DefaultMutableSlot(String name, Object value)
  {
    super(name, value);
  }

  public DefaultMutableSlot(String name)
  {
    super(name, null);
  }

  public DefaultMutableSlot(ISlot slot)
  {
    super(slot.getName(), slot.getValue());
  }

  @Override
  public DefaultMutableSlot clone()
  {
    return new DefaultMutableSlot(this);
  }

  /**
   * @see org.jactr.core.slot.IMutableSlot#setValue(java.lang.Object)
   */
  public void setValue(Object value)
  {
    Object oldValue = setValueInternal(value);
    if (oldValue != value) notifyOwner(oldValue, value);
  }

  /**
   * value is intentionally excluded since we dont want the hash to change..
   */
  @Override
  public int hashCode()
  {
    final int prime = 31;
    int result = 1;
    result = prime * result + (getName() == null ? 0 : getName().hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj)
  {
    if (this == obj) return true;
    if (obj == null) return false;
    if (getClass() != obj.getClass()) return false;
    BasicSlot other = (BasicSlot) obj;
    if (getName() == null)
    {
      if (other.getName() != null) return false;
    }
    else if (!getName().equals(other.getName())) return false;
    return true;
  }
}