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Difference between revisions of "VIATRA/Query/DeveloperDocumentation/QueryEngineArchitecture"

< VIATRA‎ | Query
(Update to VIATRA Query 1.2)
 
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* '''ViatraQueryEngine''': the central element of the API.
 
* '''ViatraQueryEngine''': the central element of the API.
* '''ViatraQueryScope''': the set of model elements the ViatraQueryEngine should work on. The project itself implements only EMFScope right now.
+
* '''QueryScope''': the set of model elements the ViatraQueryEngine should work on.
* '''EMFQueryRuntimeContext''': wrapper class for the query backends to access the model. The access can be both indexed and non-indexed.
+
** The project itself implements only '''EMFScope''' right now.
* '''IQueryBackend''': an executor of graph pattern matches; it instantiates IResultProviders. Query Backends needs to be registered to the ViatraQueryEngine itself.
+
* '''IQueryRuntimeContext''': wrapper class for the query backends to access the model. The access can be both indexed and non-indexed.
** '''RetePatternMatcher''' is the fully incremental implementation of the IResultProvider interface.
+
* '''IQueryBackend''': an executor of graph pattern matches; it instantiates '''IQueryResultProvider'''s. Query Backends needs to be registered to the ViatraQueryEngine itself.
** '''LocalSearchMatcher''' is a local search based implementation of the IResultProvider interface.
+
** '''RetePatternMatcher''' is the fully incremental implementation of the '''IQueryResultProvider''' interface.
* The '''Matcher''' interface is the public matcher API: generated instances are type-safe.
+
** '''LocalSearchResultProvider''' is a local search based implementation of the '''IQueryResultProvider''' interface.
 +
* The '''ViatraQueryMatcher''' interface is the public matcher API: generated instances are type-safe.

Latest revision as of 17:40, 29 March 2016

VIATRA Query Engine Internals

Overview

IncQueryEngine.png

Most important concepts

  • ViatraQueryEngine: the central element of the API.
  • QueryScope: the set of model elements the ViatraQueryEngine should work on.
    • The project itself implements only EMFScope right now.
  • IQueryRuntimeContext: wrapper class for the query backends to access the model. The access can be both indexed and non-indexed.
  • IQueryBackend: an executor of graph pattern matches; it instantiates IQueryResultProviders. Query Backends needs to be registered to the ViatraQueryEngine itself.
    • RetePatternMatcher is the fully incremental implementation of the IQueryResultProvider interface.
    • LocalSearchResultProvider is a local search based implementation of the IQueryResultProvider interface.
  • The ViatraQueryMatcher interface is the public matcher API: generated instances are type-safe.

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