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// -*- C++ -*-
//=============================================================================
/**
* @file Notify_Constraint_Visitors.h
*
* $Id$
*
* @author Pradeep Gore <pradeep@cs.wustl.edu>
* @author Jeff Parsons <parsons@cs.wustl.edu>
*/
//=============================================================================
#ifndef NOTIFY_CONSTRAINT_VISITORS_H
#define NOTIFY_CONSTRAINT_VISITORS_H
#include /**/ "ace/pre.h"
#include "ace/Hash_Map_Manager.h"
#include "ace/Unbounded_Queue.h"
#include "ace/Null_Mutex.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/ETCL/ETCL_Constraint_Visitor.h"
#include "orbsvcs/ETCL/ETCL_Constraint.h"
#include "orbsvcs/CosNotificationC.h"
#include "orbsvcs/Notify/notify_serv_export.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
class TAO_Notify_Property_Constraint;
class TAO_Notify_Serv_Export TAO_Notify_Constraint_Visitor
: public TAO_ETCL_Constraint_Visitor
{
public:
/// Constructor.
TAO_Notify_Constraint_Visitor (void);
/// Put the event data into our hash map.
int bind_structured_event (const CosNotification::StructuredEvent &s_event);
/**
* Returns 1 if the event satisfies the constraint
* represented by the the expression tree rooted at <root>, 0 if it
* doesn't. If an error occurs during the process, the traversal
* automatically fails.
*/
CORBA::Boolean evaluate_constraint (TAO_ETCL_Constraint *root);
// The overridden methods.
int visit_literal (TAO_ETCL_Literal_Constraint *);
int visit_identifier (TAO_ETCL_Identifier *);
int visit_union_value (TAO_ETCL_Union_Value *);
int visit_union_pos (TAO_ETCL_Union_Pos *);
int visit_component_pos (TAO_ETCL_Component_Pos *);
int visit_component_assoc (TAO_ETCL_Component_Assoc *);
int visit_component_array (TAO_ETCL_Component_Array *);
int visit_special (TAO_ETCL_Special *);
int visit_component (TAO_ETCL_Component *);
int visit_dot (TAO_ETCL_Dot *);
int visit_eval (TAO_ETCL_Eval *);
int visit_default (TAO_ETCL_Default *);
int visit_exist (TAO_ETCL_Exist *);
int visit_unary_expr (TAO_ETCL_Unary_Expr *);
int visit_binary_expr (TAO_ETCL_Binary_Expr *);
int visit_preference (TAO_ETCL_Preference *);
protected:
// Sub-methods for visit_binary_expr().
int visit_or (TAO_ETCL_Binary_Expr *);
int visit_and (TAO_ETCL_Binary_Expr *);
int visit_twiddle (TAO_ETCL_Binary_Expr *);
int visit_in (TAO_ETCL_Binary_Expr *);
int visit_binary_op (TAO_ETCL_Binary_Expr *binary_expr,
int op_type);
// These use dynamic anys to look inside the ETCL component.
CORBA::Boolean sequence_does_contain (const CORBA::Any *any,
TAO_ETCL_Literal_Constraint &item);
CORBA::Boolean array_does_contain (const CORBA::Any *any,
TAO_ETCL_Literal_Constraint &item);
CORBA::Boolean struct_does_contain (const CORBA::Any *any,
TAO_ETCL_Literal_Constraint &item);
CORBA::Boolean union_does_contain (const CORBA::Any *any,
TAO_ETCL_Literal_Constraint &item);
CORBA::Boolean any_does_contain (const CORBA::Any *any,
TAO_ETCL_Literal_Constraint &item);
// Utility function to compare a TAO_ETCL_Literal_Constraint type
// and a type code.
CORBA::Boolean simple_type_match (int expr_type,
CORBA::TCKind tc_kind);
enum structured_event_field
{
FILTERABLE_DATA,
HEADER,
FIXED_HEADER,
EVENT_TYPE,
DOMAIN_NAME,
TYPE_NAME,
EVENT_NAME,
VARIABLE_HEADER,
REMAINDER_OF_BODY,
EMPTY
};
/// Storage for the type of implicit id the component has (if any).
structured_event_field implicit_id_;
/// Size of implicit_ids_ hash map.
/// @note A fixed set of 9 keys are stored in this map. In the absence
/// of a minimal perfect hash, ACE's default hash_pjw() and a hash size
/// of 27 ensures each element is hashed to a unique bucket.
/// TODO: define inline once VC6 support is deprecated.
static const size_t implicit_ids_size_;
/// Lookup table for the implicit ids, to avoid string comparisons in
/// derived visitors.
ACE_Hash_Map_Manager <ACE_CString, structured_event_field, ACE_Null_Mutex>
implicit_ids_;
/// Size of filterable_data_ hash map.
/// TODO: define inline once VC6 support is deprecated.
static const size_t filterable_data_size_;
/// Used to lookup names and values in the event's 'filterable_data' field.
ACE_Hash_Map_Manager <ACE_CString, CORBA::Any, ACE_Null_Mutex>
filterable_data_;
/// Size of variable_header_ hash map.
/// TODO: define inline once VC6 support is deprecated.
static const size_t variable_header_size_;
/// Used to lookup names and values in the event's 'variable_header' field.
ACE_Hash_Map_Manager <ACE_CString, CORBA::Any, ACE_Null_Mutex>
variable_header_;
/// Storage for string names under the structured event's
/// 'fixed_header' field.
CORBA::String_var domain_name_;
CORBA::String_var type_name_;
CORBA::String_var event_name_;
/// Storage for the structured_event's 'remainder_of_body' field.
CORBA::Any remainder_of_body_;
/// The result of a non_boolean operation.
ACE_Unbounded_Queue <TAO_ETCL_Literal_Constraint> queue_;
/// Holder for a value found in the event fields filterable_data,
/// variable_header or remainder_of_body.
CORBA::Any_var current_value_;
/// Holder for a string name in the event fields fixed_header,
/// variable_header, or filterable_data.
CORBA::String_var current_name_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* NOTIFY_CONSTRAINT_VISITORS_H */
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