Examples with Op org.apache.jena.sparql.algebra.Op used on opensource projects

Example 16 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TestOptimizer method combine_extend_04.

@Test
public void combine_extend_04() {
    String opString = StrUtils.strjoinNL("(extend ((?x 2))", "  (extend ((?y 3))", "    (distinct", "      (extend ((?a 'A') (?b 'B'))", "        (extend ((?c 'C'))", "          (table unit)", "        )))))");
    String opExpectedString = StrUtils.strjoinNL("(extend ((?y 3) (?x 2))", "  (distinct", "    (extend ((?c 'C') (?a 'A') (?b 'B'))", "      (table unit))))");
    Op op = SSE.parseOp(opString);
    check(op, new TransformExtendCombine(), opExpectedString);
}

Example 17 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TestOptimizer method combine_extend_01.

@Test
public void combine_extend_01() {
    Op extend = OpExtend.create(OpTable.unit(), new VarExprList(Var.alloc("x"), new NodeValueInteger(1)));
    extend = OpExtend.create(extend, new VarExprList(Var.alloc("y"), new NodeValueInteger(2)));
    String opExpectedString = StrUtils.strjoinNL("(extend ((?x 1) (?y 2))", "  (table unit))");
    check(extend, new TransformExtendCombine(), opExpectedString);
}

Example 18 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TestSemanticEquivalence method testAsAlgebra.

/**
     * Tests whether an algebra expression gives the same results when run both
     * with and without a given optimizer
     * 
     * @param algStr
     *            Algebra
     * @param ds
     *            Dataset
     * @param opt
     *            Optimizer
     * @param expected
     *            Expected number of results
     */
public static void testAsAlgebra(String algStr, Dataset ds, Symbol opt, int expected) {
    Op op = SSE.parseOp(algStr);
    List<String> vars = new ArrayList<>();
    for (Var v : OpVars.visibleVars(op)) {
        vars.add(v.getName());
    }
    // Track current state
    boolean isEnabled = ARQ.isTrue(opt);
    boolean isDisabled = ARQ.isFalse(opt);
    try {
        // Run first without optimization
        ARQ.set(opt, false);
        QueryEngineMain engine = new QueryEngineMain(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
        QueryIterator iter = engine.eval(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
        ResultSetRewindable rs = ResultSetFactory.makeRewindable(new ResultSetStream(vars, ModelFactory.createDefaultModel(), iter));
        if (expected != rs.size()) {
            System.err.println("Non-optimized results not as expected");
            TextOutput output = new TextOutput((SerializationContext) null);
            output.format(System.out, rs);
            rs.reset();
        }
        Assert.assertEquals(expected, rs.size());
        iter.close();
        // Run with optimization
        ARQ.set(opt, true);
        engine = new QueryEngineMain(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
        QueryIterator iterOpt = engine.eval(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
        ResultSetRewindable rsOpt = ResultSetFactory.makeRewindable(new ResultSetStream(vars, ModelFactory.createDefaultModel(), iterOpt));
        if (expected != rsOpt.size()) {
            System.err.println("Optimized results not as expected");
            TextOutput output = new TextOutput((SerializationContext) null);
            output.format(System.out, rsOpt);
            rsOpt.reset();
        }
        Assert.assertEquals(expected, rsOpt.size());
        iterOpt.close();
        Assert.assertTrue(ResultSetCompare.isomorphic(rs, rsOpt));
    } finally {
        // Restore previous state
        if (isEnabled) {
            ARQ.set(opt, true);
        } else if (isDisabled) {
            ARQ.set(opt, false);
        } else {
            ARQ.unset(opt);
        }
    }
}

Example 19 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TestTransformConstantFolding method test.

private void test(String input, String expected, ExprTransform transform) {
    Op opOrig = SSE.parseOp(input);
    Op opExpected = SSE.parseOp(expected != null ? expected : input);
    Op opOptimized = Transformer.transform(new TransformCopy(), transform, opOrig);
    Assert.assertEquals(opExpected, opOptimized);
}

Example 20 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TestTransformEliminateAssignments method test.

private void test(Op original, boolean aggressive, String... output) {
    // Transform
    Op actual = TransformEliminateAssignments.eliminate(original, aggressive);
    // Check results
    if (output == null) {
        // No transformation.
        Assert.assertEquals(original, actual);
    } else {
        // Transformation expected
        Op expected = SSE.parseOp(StrUtils.strjoinNL(output));
        Assert.assertEquals(expected, actual);
    }
}