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Diffstat (limited to 'TAO/orbsvcs/orbsvcs/Notify/Notify_Constraint_Visitors.h')
| -rw-r--r-- | TAO/orbsvcs/orbsvcs/Notify/Notify_Constraint_Visitors.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/TAO/orbsvcs/orbsvcs/Notify/Notify_Constraint_Visitors.h b/TAO/orbsvcs/orbsvcs/Notify/Notify_Constraint_Visitors.h new file mode 100644 index 00000000000..2033737b4ec --- /dev/null +++ b/TAO/orbsvcs/orbsvcs/Notify/Notify_Constraint_Visitors.h @@ -0,0 +1,168 @@ +// -*- 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 */ |