Examples of com.hp.hpl.jena.sparql.engine.main.StageGenerator

Package com.hp.hpl.jena.sparql.engine.main

Examples of com.hp.hpl.jena.sparql.engine.main.StageGenerator

com.hp.hpl.jena.sparql.engine.main.StageGenerator
Interface for execution of a basic graph pattern. A StageGenerator is registred in the context of an query execution to be found and called by the StageBuilder. The StageGenerator is called repeated for a basic graph pattern with each possible bindings unsed to instantiate variables where possible. Each call of a stage generator returns a QueryIterator of solutions to the pattern for each of the possibilities (bindings) from the input query iterator. Result bindings to a particular input binding should use that as their parent, to pick up the variable bounds for that particular input. @see StageBuilder

        // alter so that just one query execution is affected.


        // Change the stage generator for all queries ...
        if ( false )
        {
            StageGenerator origStageGen = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;
            StageGenerator stageGenAlt = new StageGeneratorAlt(origStageGen) ;
            ARQ.getContext().set(ARQ.stageGenerator, stageGenAlt) ;
        }
        
        Query query = QueryFactory.create( StrUtils.strjoin("\n", queryString)) ;
        QueryExecution engine = QueryExecutionFactory.create(query, makeData()) ;
        
        // ... or set on a per-execution basis.
        if ( true )
        {
            StageGenerator origStageGen = (StageGenerator)engine.getContext().get(ARQ.stageGenerator) ;
            StageGenerator stageGenAlt = new StageGeneratorAlt(origStageGen) ;
            engine.getContext().set(ARQ.stageGenerator, stageGenAlt) ;
        }
        
        QueryExecUtils.executeQuery(query, engine) ;
    }

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            log.debug("\n" + ARQ.getContext()) ;
    }


    private static void wireIntoExecution() {
        // Globally change the stage generator to intercept BGP on TDB
        StageGenerator orig = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;


        // Wire in the TDB stage generator which will make TDB work whether
        // or not the TDB executor is used. This means that datasets of mixed
        // graph types inside a general purpose dataset work.
        StageGenerator stageGenerator = new StageGeneratorDirectTDB(orig) ;
        StageBuilder.setGenerator(ARQ.getContext(), stageGenerator) ;
    }

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        // alter so that just one query execution is affected.


        // Change the stage generator for all queries ...
        if ( false )
        {
            StageGenerator origStageGen = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;
            StageGenerator stageGenAlt = new StageGeneratorAlt(origStageGen) ;
            ARQ.getContext().set(ARQ.stageGenerator, stageGenAlt) ;
        }
        
        Query query = QueryFactory.create( StrUtils.strjoin("\n", queryString)) ;
        QueryExecution engine = QueryExecutionFactory.create(query, makeData()) ;
        
        // ... or set on a per-execution basis.
        if ( true )
        {
            StageGenerator origStageGen = (StageGenerator)engine.getContext().get(ARQ.stageGenerator) ;
            StageGenerator stageGenAlt = new StageGeneratorAlt(origStageGen) ;
            engine.getContext().set(ARQ.stageGenerator, stageGenAlt) ;
        }
        
        QueryExecUtils.executeQuery(query, engine) ;
    }

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        if (pattern.isEmpty())
            return input ;


        boolean hideBNodeVars = execCxt.getContext().isTrue(ARQ.hideNonDistiguishedVariables) ;


        StageGenerator gen = StageBuilder.executeInline ;
        QueryIterator qIter = gen.execute(pattern, input, execCxt) ;


        // Remove non-distinguished variables here.
        // Project out only named variables.
        if (hideBNodeVars)
            qIter = new QueryIterDistinguishedVars(qIter, execCxt) ;

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    private static void wireIntoExecution()
    {
        // TDB does it itself.
        TDB.getContext().set(ARQ.optFilterPlacement, false) ;
        // Globally change the stage generator to intercept BGP on TDB
        StageGenerator orig = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;
        
        // Wire in the TDB stage generator which will make TDB work whether
        // or not the TDB executor is used. This means that datasets of mixed graph
        // types inside a general purpose dataset work.
        StageGenerator stageGenerator = new StageGeneratorDirectTDB(orig) ;
        StageBuilder.setGenerator(ARQ.getContext(), stageGenerator) ;


        // Wire in the new OpExecutor.  
        // This is normal way to execute with a general dataset or a 
        // model that is TDB-backed.

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    private static void wireIntoExecution()
    {
        // TDB does it itself.
        TDB.getContext().set(ARQ.optFilterPlacement, false) ;
        // Globally change the stage generator to intercept BGP on TDB
        StageGenerator orig = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;
        
        // Wire in the TDB stage generator which will make TDB work whether
        // or not the TDB executor is used. This means that datasets of mixed graph
        // types inside a general purpose dataset work.
        StageGenerator stageGenerator = new StageGeneratorDirectTDB(orig) ;
        StageBuilder.setGenerator(ARQ.getContext(), stageGenerator) ;


        // Wire in the new OpExecutor.  This is normal way to execute with a dataset.
        QC.setFactory(ARQ.getContext(), OpExecutorTDB.OpExecFactoryTDB) ;
    }

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    wireIntoExecution();
    testGraphCSV();
  }
  
    private static void wireIntoExecution() {
        StageGenerator orig = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;
        StageGenerator stageGenerator = new StageGeneratorPropertyTable(orig) ;
        StageBuilder.setGenerator(ARQ.getContext(), stageGenerator) ;
    }

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    private static void wireIntoExecution()
    {
        // TDB does it itself.
        TDB.getContext().set(ARQ.optFilterPlacement, false) ;
        // Globally change the stage generator to intercept BGP on TDB
        StageGenerator orig = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;
        
        // Wire in the TDB stage generator which will make TDB work whether
        // or not the TDB executor is used. This means that datasets of mixed graph
        // types inside a general purpose dataset work.
        StageGenerator stageGenerator = new StageGeneratorDirectTDB(orig) ;
        StageBuilder.setGenerator(ARQ.getContext(), stageGenerator) ;


        // Wire in the new OpExecutor.  This is normal way to execute with a dataset.
        QC.setFactory(ARQ.getContext(), OpExecutorTDB.OpExecFactoryTDB) ;
    }

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            log.debug("\n" + ARQ.getContext()) ;
    }


    private static void wireIntoExecution() {
        // Globally change the stage generator to intercept BGP on TDB
        StageGenerator orig = (StageGenerator)ARQ.getContext().get(ARQ.stageGenerator) ;


        // Wire in the TDB stage generator which will make TDB work whether
        // or not the TDB executor is used. This means that datasets of mixed
        // graph types inside a general purpose dataset work.
        StageGenerator stageGenerator = new StageGeneratorDirectTDB(orig) ;
        StageBuilder.setGenerator(ARQ.getContext(), stageGenerator) ;
    }

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        if (pattern.isEmpty())
            return input ;


        boolean hideBNodeVars = execCxt.getContext().isTrue(ARQ.hideNonDistiguishedVariables) ;


        StageGenerator gen = StageBuilder.executeInline ;
        QueryIterator qIter = gen.execute(pattern, input, execCxt) ;


        // Remove non-distinguished variables here.
        // Project out only named variables.
        if (hideBNodeVars)
            qIter = new QueryIterDistinguishedVars(qIter, execCxt) ;

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Related Classes of com.hp.hpl.jena.sparql.engine.main.StageGenerator

arq.examples.bgpmatching.StageAltMain

com.hp.hpl.jena.sparql.engine.ref.Eval

com.hp.hpl.jena.tdb.TDB

org.apache.jena.propertytable.graph.GraphCSVTest

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