In order to satisfy my RT about service attributes used to provide
automated assembly logic, we need to make some API changes to Meta.
What we are comparing is a Service Reference (i.e. requires service) to
a component (i.e. Type) implementation. The Service descriptor with all
the attributes provides the rules to interpret the attributes. To that
end, we need the Service to generate a Comparator.
public class Service extends Descriptor
{
// .... skip everything else
public java.lang.Comparator getComparator()
{
// logic to build the comparator using predicates, etc.
}
}
That way we can create a nice little utility that would find the best
match:
public final class MetaUtil
{
private MetaUtil() {}
public static final Object findBestMatch( List components,
Service service )
{
// Order so that the best match comes first
Collections.order( components, service.getComparator() );
return components.get(0);
}
}
Granted, it can still be overridden by an assembly file, but
this way we can provide the default logic to find the best way to
generate the assembly file to begin with.
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