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Difference between revisions of "VIATRA/Query/DeveloperDocumentation/QueryEngineArchitecture"
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== VIATRA Query Engine Internals == | == VIATRA Query Engine Internals == | ||
Latest revision as of 09:52, 2 April 2024
Old information
The content from this page was migrated to the new, Github-based wiki system of VIATRA: https://github.com/eclipse-viatra/org.eclipse.viatra/wiki/VIATRA-Query-Engine-Internals
The content from this page was migrated to the new, Github-based wiki system of VIATRA: https://github.com/eclipse-viatra/org.eclipse.viatra/wiki/VIATRA-Query-Engine-Internals
VIATRA Query Engine Internals
Overview
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.