worldsim/src/ownable.cpp

/********************************************************************************
 *  WorldSim -- library for robot simulations                                   *
 *  Copyright (C) 2008-2011 Gianluca Massera <emmegian@yahoo.it>                *
 *                                                                              *
 *  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 2 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, write to the Free Software                 *
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA  *
 ********************************************************************************/

#include "ownable.h"

namespace farsa {

Ownable::Ownable() :
    m_owner(NULL),
    m_owned()
{
}

Ownable::~Ownable()
{
    // If I'm owned by some other object, removing myself from the list
    if (m_owner != NULL) {
        m_owner->removeFromOwned(this);
    }

    // Now deleting all owned objects I have to delete
    foreach (Owned o, m_owned) {
        if (o.destroy) {
            delete o.object;
        }
    }

    m_owned.clear();
}

void Ownable::setOwner(Ownable *owner, bool destroy)
{
    // If I was owned by another object, first removing from my old owner
    if ((m_owner != NULL) && (m_owner != owner)) {
        m_owner->removeFromOwned(this);
    }

    m_owner = owner;

    // Now adding to the new owner
    if (m_owner != NULL) {
        m_owner->addToOwned(this, destroy);
    }
}

void Ownable::addToOwned(Ownable *obj, bool destroy)
{
    m_owned.append(Owned(obj, destroy));
}

void Ownable::removeFromOwned(Ownable *obj)
{
    m_owned.removeAll(Owned(obj));
}

}