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// $Id$
#include "orbsvcs/Event_Service_Constants.h"
#include "EC_Basic_Filter_Builder.h"
#include "EC_Type_Filter.h"
#include "EC_Conjunction_Filter.h"
#include "EC_Disjunction_Filter.h"
#include "EC_And_Filter.h"
#include "EC_Negation_Filter.h"
#include "EC_Bitmask_Filter.h"
#include "EC_Masked_Type_Filter.h"
#include "EC_Timeout_Filter.h"
#if ! defined (__ACE_INLINE__)
#include "EC_Basic_Filter_Builder.i"
#endif /* __ACE_INLINE__ */
ACE_RCSID(Event, EC_Basic_Filter_Builder, "$Id$")
TAO_EC_Basic_Filter_Builder::~TAO_EC_Basic_Filter_Builder (void)
{
}
TAO_EC_Filter*
TAO_EC_Basic_Filter_Builder::build (
TAO_EC_ProxyPushSupplier *supplier,
RtecEventChannelAdmin::ConsumerQOS& qos
ACE_ENV_ARG_DECL_NOT_USED) const
{
CORBA::ULong pos = 0;
return this->recursive_build (supplier, qos, pos);
}
TAO_EC_Filter*
TAO_EC_Basic_Filter_Builder:: recursive_build (
TAO_EC_ProxyPushSupplier *supplier,
RtecEventChannelAdmin::ConsumerQOS& qos,
CORBA::ULong& pos) const
{
CORBA::ULong l = qos.dependencies.length ();
if (pos == l)
return 0;
const RtecEventComm::Event& e = qos.dependencies[pos].event;
if (e.header.type == ACE_ES_CONJUNCTION_DESIGNATOR)
{
pos++; // Consume the designator
CORBA::ULong n = this->count_children (qos, pos);
TAO_EC_Filter** children;
ACE_NEW_RETURN (children, TAO_EC_Filter*[n], 0);
CORBA::ULong i = 0;
for (; i != n; ++i)
{
children[i] = this->recursive_build (supplier, qos, pos);
}
return new TAO_EC_Conjunction_Filter (children, n);
}
else if (e.header.type == ACE_ES_DISJUNCTION_DESIGNATOR)
{
pos++; // Consume the designator
CORBA::ULong n = this->count_children (qos, pos);
TAO_EC_Filter** children;
ACE_NEW_RETURN (children, TAO_EC_Filter*[n], 0);
CORBA::ULong i = 0;
for (; i != n; ++i)
{
children[i] = this->recursive_build (supplier, qos, pos);
}
return new TAO_EC_Disjunction_Filter (children, n);
}
else if (e.header.type == ACE_ES_LOGICAL_AND_DESIGNATOR)
{
pos++; // Consume the designator
CORBA::ULong n = this->count_children (qos, pos);
TAO_EC_Filter** children;
ACE_NEW_RETURN (children, TAO_EC_Filter*[n], 0);
CORBA::ULong i = 0;
for (; i != n; ++i)
{
children[i] = this->recursive_build (supplier, qos, pos);
}
return new TAO_EC_And_Filter (children, n);
}
else if (e.header.type == ACE_ES_NEGATION_DESIGNATOR)
{
pos++; // Consume the designator
TAO_EC_Filter *child =
this->recursive_build (supplier, qos, pos);
return new TAO_EC_Negation_Filter (child);
}
else if (e.header.type == ACE_ES_BITMASK_DESIGNATOR)
{
pos++; // COnsumer the designator
if (pos == qos.dependencies.length ())
return 0;
CORBA::ULong source_mask = qos.dependencies[pos].event.header.source;
CORBA::ULong type_mask = qos.dependencies[pos].event.header.type;
pos++;
TAO_EC_Filter *child =
this->recursive_build (supplier, qos, pos);
return new TAO_EC_Bitmask_Filter (source_mask,
type_mask,
child);
}
else if (e.header.type == ACE_ES_MASKED_TYPE_DESIGNATOR)
{
pos++; // Consume the designator
if (pos == qos.dependencies.length ())
return 0;
CORBA::ULong source_mask = qos.dependencies[pos].event.header.source;
CORBA::ULong type_mask = qos.dependencies[pos].event.header.type;
pos++;
if (pos == qos.dependencies.length ())
return 0;
CORBA::ULong source_value = qos.dependencies[pos].event.header.source;
CORBA::ULong type_value = qos.dependencies[pos].event.header.type;
pos++;
return new TAO_EC_Masked_Type_Filter (source_mask,
type_mask,
source_value,
type_value);
}
else if (e.header.type == ACE_ES_NULL_DESIGNATOR)
{
pos++; // Consume the designator
return new TAO_EC_Null_Filter ();
}
else if (e.header.type == ACE_ES_EVENT_TIMEOUT
|| e.header.type == ACE_ES_EVENT_INTERVAL_TIMEOUT
|| e.header.type == ACE_ES_EVENT_DEADLINE_TIMEOUT)
{
pos++; // Consume the designator
TAO_EC_QOS_Info qos_info;
return new TAO_EC_Timeout_Filter (this->event_channel_,
supplier,
qos_info,
e.header.type,
e.header.creation_time);
}
pos++; // Consume the event
return new TAO_EC_Type_Filter (e.header);
}
CORBA::ULong
TAO_EC_Basic_Filter_Builder::
count_children (RtecEventChannelAdmin::ConsumerQOS& qos,
CORBA::ULong pos) const
{
CORBA::ULong l = qos.dependencies.length ();
CORBA::ULong i;
int count = 0;
for (i = pos; i != l; ++i)
{
const RtecEventComm::Event& e = qos.dependencies[i].event;
if (e.header.type == ACE_ES_CONJUNCTION_DESIGNATOR
|| e.header.type == ACE_ES_DISJUNCTION_DESIGNATOR
|| e.header.type == ACE_ES_LOGICAL_AND_DESIGNATOR)
// We won't let these be nested by the basic filter builder.
// Assume these are the end of the group
break;
else if (e.header.type == ACE_ES_BITMASK_DESIGNATOR)
// These take up an extra element
i++;
else if (e.header.type == ACE_ES_MASKED_TYPE_DESIGNATOR)
// These take up two extra elements
i += 2;
else if (e.header.type == ACE_ES_NEGATION_DESIGNATOR) {
// These enclose another filter.
// Lets try to figure out how many elements the enclosed
// filter takes up (but don't count it in the group).
// Only allow basic filter types and bitmasks within
// a negation (when it is nested within a group).
// This is isn't perfect, but its about the best we can
// do without prefixes.
i++;
switch (qos.dependencies[i].event.header.type) {
case ACE_ES_BITMASK_DESIGNATOR:
i++;
break;
case ACE_ES_MASKED_TYPE_DESIGNATOR:
i += 2;
break;
}
}
count++;
}
return count;
}
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