CosNotifyFilter_MappingFilter(3)

NAME
CosNotifyFilter_MappingFilter - This module implements the OMG CosNotifyFilter::MappingFilter interface.

DESCRIPTION

The main purpose of this module is to match events against associated constraints and return the value for the first constraint that returns true for the given event. If all constraints return false the default value will be returned.

To get access to the record definitions for the structures use:
-include_lib("cosNotification/include/*.hrl").

EXPORTS

_get_constraint_grammar(MappingFilter) -> Grammar

    Types:
        MappingFilter = #objref
        Grammar = string()

    This operation returns which type of Grammar the MappingFilter uses. Currently, only "EXTENDED_TCL" is supported.

_get_value_type(MappingFilter) -> CORBA::TypeCode

    Types:
        MappingFilter = #objref

    This readonly attribute maintains the CORBA::TypeCode of the default value associated with the target object.

_get_default_value(MappingFilter) -> #any

    Types:
        MappingFilter = #objref

    This readonly attribute maintains the #any{} default value associated with the target object.

add_mapping_constraints(MappingFilter, MappingConstraintPairSeq) -> Reply

    Types:
        MappingFilter = #objref
        MappingConstraintPairSeq = [MappingConstraintPair]
        MappingConstraintPair = #'CosNotifyFilter_MappingConstraintPair'{constraint_expression, result_to_set}
        constraint_expression = #'CosNotifyFilter_ConstraintExp'{event_types, constraint_expr}
        event_types = #'CosNotification_EventTypeSeq'{}
        constraint_expr = string()
        result_to_set = #any
        Reply = MappingConstraintInfoSeq | {'EXCEPTION', #'CosNotifyFilter_InvalidConstraint'{constr}} | {'EXCEPTION', #'CosNotifyFilter_InvalidValue'{constr, value}}
        constr = ConstraintExp
        ConstraintExp = #'CosNotifyFilter_ConstraintExp'{event_types, constraint_expr}
        event_types = #'CosNotification_EventTypeSeq'{}
        constraint_expr = string()
        MappingConstraintInfoSeq = [MappingConstraintInfo]
        MappingConstraintInfo = #'CosNotifyFilter_MappingConstraintInfo'{constraint_expression, constraint_id, value}
        constraint_expression = ConstraintExp
        constraint_id = long()
        value = #any

    This operation add new mapping constraints, which will be used when trying to override Quality of Service settings defined in the given event. If a constraint return true the associated value will be returned, otherwise the default value.

modify_constraints(MappingFilter, ConstraintIDSeq, MappingConstraintInfoSeq) -> Reply

    Types:
        MappingFilter = #objref
        ConstraintIDSeq = [ConstraintID]
        ConstraintID = long()
        MappingConstraintInfoSeq = [MappingConstraintInfo]
        MappingConstraintInfo = #'CosNotifyFilter_MappingConstraintInfo'{constraint_expression, constraint_id, value}
        constraint_expression = ConstraintExp
        constraint_id = long()
        value = #any
        ConstraintInfoSeq = [ConstraintInfo]
        ConstraintInfo = #'CosNotifyFilter_ConstraintInfo'{constraint_expression, constraint_id}
        constraint_expression = ConstraintExp
        constraint_id = long()
        Reply = ok | {'EXCEPTION', #'CosNotifyFilter_InvalidConstraint'{constr}} | {'EXCEPTION', #'CosNotifyFilter_ConstraintNotFound'{id}} | {'EXCEPTION', #'CosNotifyFilter_InvalidValue'{constr, value}}
        constr = ConstraintExp
        id = long()
        value = #any
        ConstraintExp = #'CosNotifyFilter_ConstraintExp'{event_types, constraint_expr}
        event_types = #'CosNotification_EventTypeSeq'{}
        constraint_expr = string()

    The ConstraintIDSeq supplied should relate to constraints the caller wishes to remove. If any of the supplied Id's are not found an exception will be raised. This operation also accepts a sequence of MappingConstraintInfo which will be added. If the target object cannot modify the constraints as requested an exception is raised describing which constraint, and why, could not be updated.

get_mapping_constraints(MappingFilter, ConstraintIDSeq) -> Reply

    Types:
        MappingFilter = #objref
        ConstraintIDSeq = [ConstraintID]
        ConstraintID = long()
        Reply = MappingConstraintInfoSeq | {'EXCEPTION', #'CosNotifyFilter_ConstraintNotFound'{id}}
        MappingConstraintInfoSeq = [MappingConstraintInfo]
        MappingConstraintInfo = #'CosNotifyFilter_MappingConstraintInfo'{constraint_expression, constraint_id, value}
        constraint_expression = ConstraintExp
        ConstraintExp = #'CosNotifyFilter_ConstraintExp'{event_types, constraint_expr}
        event_types = #'CosNotification_EventTypeSeq'{}
        constraint_expr = string()
        constraint_id = id = long()
        value = #any

    When adding a new constraint a unique Id is returned, which is accepted as input for this operation. The associated constraint is returned, but if no such Id exists an exception is raised.

get_all_mapping_constraints(MappingFilter) -> MappingConstraintInfoSeq

    Types:
        MappingFilter = #objref
        MappingConstraintInfoSeq = [MappingConstraintInfo]
        MappingConstraintInfo = #'CosNotifyFilter_MappingConstraintInfo'{constraint_expression, constraint_id, value}
        constraint_expression = ConstraintExp
        ConstraintExp = #'CosNotifyFilter_ConstraintExp'{event_types, constraint_expr}
        event_types = #'CosNotification_EventTypeSeq'{}
        constraint_expr = string()
        constraint_id = long()
        value = #any

    This operation returns a sequence of all unique Id's associated with the target object. If no constraint have been added the sequence will be empty.

remove_all_mapping_constraints(MappingFilter) -> ok

    Types:
        MappingFilter = #objref

    This operation removes all constraints associated with the target object.

destroy(MappingFilter) -> ok

    Types:
        MappingFilter = #objref

    This operation terminates the target object. Remember to remove this Filter from the objects it have been associated with.

match(MappingFilter, Event) -> Reply

    Types:
        MappingFilter = #objref
        Event = #any
        Reply = {boolean(), #any} | {'EXCEPTION', #'CosNotifyFilter_UnsupportedFilterableData'{}}

    This operation evaluates Any events with the Filter's constraints, and returns the value to use. The value is the default value if all constraints returns false and the value associated with the first constraint returning true.

match_structured(MappingFilter, Event) -> Reply

    Types:
        MappingFilter = #objref
        Event = #'CosNotification_StructuredEvent'{}
        Reply = {boolean(), #any} | {'EXCEPTION', #'CosNotifyFilter_UnsupportedFilterableData'{}}

    Similar to match/2 but accepts a structured event as input.