RLS11 — Ambiguity in InterfaceBase parameters

We can access parameter values in two ways: InterfaceBase::getAbility and InterfaceBase::getParameterValues. InterfaceBase::ability can be StreamAbility or ServiceAbility and they have inherited attribute (attrs) from AttributeSet. They also have their own class-specific parameters (frequency, expectedLatency, ... ). However, there only is InterfaceBase::getAbility. We need InterfaceBase::setAbility to initialize Service or Stream. It is not clear what the configurable parameters of InterfaceBase::get/setParameterValues are. Implementation of InterfaceBase::get/setParameterValues is very complex and confusing. Class-specific parameters also are attribute, but handled separately from 'attrs' of AttributeSet.

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