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/* -*- C++ -*- */
// $Id$
//
// ============================================================================
//
// = LIBRARY
// ORBSVCS Real-time Event Channel
//
// = FILENAME
// EC_Basic_Filter_Builder
//
// = AUTHOR
// Carlos O'Ryan (coryan@cs.wustl.edu)
//
// = CREDITS
// Based on previous work by Tim Harrison (harrison@cs.wustl.edu)
// and other members of the DOC group.
// More details can be found in:
// http://www.cs.wustl.edu/~schmidt/oopsla.ps.gz
// http://www.cs.wustl.edu/~schmidt/JSAC-98.ps.gz
//
//
// ============================================================================
#ifndef TAO_EC_BASIC_FILTER_BUILDER_H
#define TAO_EC_BASIC_FILTER_BUILDER_H
#include "EC_Filter_Builder.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
class TAO_EC_Filter;
class TAO_EC_Event_Channel;
class TAO_ORBSVCS_Export TAO_EC_Basic_Filter_Builder : public TAO_EC_Filter_Builder
{
// = TITLE
// Implement a builder for the fundamental filters.
//
// = DESCRIPTION
// The basic filtering mechanisms in the Event channel
// (source/type based filtering + disjunctions and conjunctions)
// are constructed using this class.
//
public:
TAO_EC_Basic_Filter_Builder (TAO_EC_Event_Channel* ec);
// constructor.
virtual ~TAO_EC_Basic_Filter_Builder (void);
// destructor...
// = The TAO_EC_Filter_Builder methods...
TAO_EC_Filter* build (RtecEventChannelAdmin::ConsumerQOS& qos) const;
private:
TAO_EC_Filter* recursive_build (RtecEventChannelAdmin::ConsumerQOS& qos,
CORBA::ULong& pos) const;
// Recursively build the filter tree.
CORBA::ULong count_children (RtecEventChannelAdmin::ConsumerQOS& qos,
CORBA::ULong pos) const;
// Count the number of children of the current node, i.e. until a
// conjunction or disjunction starts.
private:
TAO_EC_Event_Channel* event_channel_;
// The event channel.
};
#if defined (__ACE_INLINE__)
#include "EC_Basic_Filter_Builder.i"
#endif /* __ACE_INLINE__ */
#endif /* TAO_EC_BASIC_FILTER_BUILDER_H */
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