Hi everyone,
I'm facing a little problem when extending protocols in a mix of
inheriting and implementing classes...Let me explain:
stanford-corenlp defines a top level interface called "Annotator" (with
a single 'annotatate' method signature'). It also defines a class called
"AnnotationPipeline" which implements Annotator and a class
StanfordCoreNLP which extends AnnotationPipeline and is essentially the
main entry point for the library...Under this class (in the hierarchy),
one can find all the concrete implementations of several 'Annotators'.
Now the problem is this: All these Annotators are not pipelines (or
workflows) they are single components in a sense, but they do implement
"Annotator" as does AnnotationPipeline. I need to extend my own protocol
"IWorkflow" to AnnotationPipeline and my own 'IComponent' to all the
single-Annotators without having them satisfy IWorkflow. It is fine if
AnnotationPipeline satisfies IComponent and NOT the other way round
(components satisfying IWorkflow).
Mybest attempt was this:
(defn extend-stanford-core
"A single fn to extend to all stanford-corenlp modules (or 'annotators'
as they call them). "
[]
(extend-type edu.stanford.nlp.pipeline.AnnotationPipeline
IWorkflow
(deploy [this ^String text]
(.annotate this text))
(appendComponent [this co]
(.addAnnotator this (reify edu.stanford.nlp.pipeline.Annotator
(annotate [this annotation]
(run co annotation))))) )
(extend-type edu.stanford.nlp.pipeline.StanfordCoreNLP
IComponent
(run [this ^String text]
(let [ann (edu.stanford.nlp.pipeline.Annotation. text)]
(.annotate this ann) ann)))
)
However, as I said, a stanfordNLP consumer will most likely use the
StanfordCoreNLP class to create the single-annotators...Consequently,
his 'components' will also satisfy IWorkflow (because StanfordCoreNLP
inherits from AnnotationPipeline), which is not desirable...
any thoughts?
Jim
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