Examples of TripleSource

com.clarkparsia.empire.ds.TripleSource

Interface which extends a {@link DataSource} to provide triple-level access to the contents of the data. Where DataSource only provides query level access, TripleSource provides the ability to make SPO "queries" into the database. When the underlying implementation natively supports this interface, there is usually a performance benefit of the "native" access when compared to writing a SPARQL query that will retrieve the same set of statements.
@author Pedro Oliveira @author Michael Grove @since 0.7 @version 0.7
org.openrdf.query.algebra.evaluation.TripleSource
A triple source that can be queried for (the existence of) certain triples in certain contexts. This interface defines the methods that are needed by the Sail Query Model to be able to evaluate itself.

Examples of org.openrdf.query.algebra.evaluation.TripleSource

    Lock readLock = nativeStore.getReadLock();


    try {
      replaceValues(tupleExpr);


      TripleSource tripleSource = new NativeTripleSource(nativeStore, includeInferred, transactionActive());
      EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, dataset);


      QueryOptimizerList optimizerList = new QueryOptimizerList();
      optimizerList.add(new BindingAssigner());
      optimizerList.add(new ConstantOptimizer(strategy));

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

            final TupleExpr query,
            final Dataset dataset,
            final BindingSet bindings,
            final boolean includeInferred) throws SailException {
        try {
            TripleSource tripleSource = new SailConnectionTripleSource(this, valueFactory, includeInferred);
            EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, dataset);
            return strategy.evaluate(query, bindings);
        } catch (QueryEvaluationException e) {
            throw new SailException(e);
        }

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

            final BindingSet bindings,
            final boolean includeInferred)
            throws SailException {
        // Decompose queries into getStatements operations so we can dereference URIs.
        try {
            TripleSource tripleSource = new SailConnectionTripleSource(this, valueFactory, includeInferred);
            EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, dataset);


            return strategy.evaluate(tupleExpr, bindings);
        } catch (QueryEvaluationException e) {
            throw new SailException(e);

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