/*
 * Copyright (c) 2009, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef RXTOOLS_ROSOUT_FILTER_H
#define RXTOOLS_ROSOUT_FILTER_H

#include <boost/shared_ptr.hpp>
#include <boost/signals.hpp>
#include "roslib/Log.h"

namespace rxtools
{

class RosoutFilter;
typedef boost::signal<void(const RosoutFilter*)> RosoutFilterChangedSignal;

class RosoutFilter
{
public:
  RosoutFilter();
  virtual ~RosoutFilter();

  bool filter(const roslib::LogConstPtr&) const;
  bool isValid() const;
  bool isEnabled() const;

  void setEnabled(bool enabled);

  RosoutFilterChangedSignal& getChangedSignal()
  {
    return changed_;
  }

protected:
  void changed() const;

  virtual bool doFilter(const roslib::LogConstPtr&) const = 0;
  virtual bool doIsValid() const = 0;

private:
  bool enabled_;

  RosoutFilterChangedSignal changed_;
};
typedef boost::shared_ptr<RosoutFilter> RosoutFilterPtr;

}

#endif // RXTOOLS_ROSOUT_FILTER_H
