Examples with BindingComparator org.apache.jena.sparql.engine.binding.BindingComparator used on opensource projects

Example 6 with BindingComparator

use of org.apache.jena.sparql.engine.binding.BindingComparator in project jena by apache.

the class TestDistinctDataBag method testDistinct.

@Test
public void testDistinct() {
    List<Binding> undistinct = new ArrayList<>();
    undistinct.add(b12);
    undistinct.add(b19);
    undistinct.add(b02);
    undistinct.add(b12);
    undistinct.add(b19);
    undistinct.add(b12);
    undistinct.add(b02);
    undistinct.add(x10);
    List<Binding> control = Iter.toList(Iter.distinct(undistinct.iterator()));
    List<Binding> distinct = new ArrayList<>();
    DistinctDataBag<Binding> db = new DistinctDataBag<>(new ThresholdPolicyCount<Binding>(2), SerializationFactoryFinder.bindingSerializationFactory(), new BindingComparator(new ArrayList<SortCondition>()));
    try {
        db.addAll(undistinct);
        Iterator<Binding> iter = db.iterator();
        while (iter.hasNext()) {
            distinct.add(iter.next());
        }
        Iter.close(iter);
    } finally {
        db.close();
    }
    assertEquals(control.size(), distinct.size());
    assertTrue(ResultSetCompare.equalsByTest(control, distinct, NodeUtils.sameTerm));
}

Example 7 with BindingComparator

use of org.apache.jena.sparql.engine.binding.BindingComparator in project jena by apache.

the class TestDistinctDataNet method testTemporaryFilesAreCleanedUpAfterCompletion.

@Test
public void testTemporaryFilesAreCleanedUpAfterCompletion() {
    List<Binding> undistinct = new ArrayList<>();
    random = new Random();
    Var[] vars = new Var[] { Var.alloc("1"), Var.alloc("2"), Var.alloc("3"), Var.alloc("4"), Var.alloc("5"), Var.alloc("6"), Var.alloc("7"), Var.alloc("8"), Var.alloc("9"), Var.alloc("0") };
    for (int i = 0; i < 500; i++) {
        undistinct.add(randomBinding(vars));
    }
    DistinctDataNet<Binding> db = new DistinctDataNet<>(new ThresholdPolicyCount<Binding>(10), SerializationFactoryFinder.bindingSerializationFactory(), new BindingComparator(new ArrayList<SortCondition>()));
    List<File> spillFiles = new ArrayList<>();
    try {
        db.addAll(undistinct);
        spillFiles.addAll(db.getSpillFiles());
        int count = 0;
        for (File file : spillFiles) {
            if (file.exists()) {
                count++;
            }
        }
        // 500 bindings divided into 50 chunks (49 in files, and 1 in memory)
        assertEquals(49, count);
        Iterator<Binding> iter = db.iterator();
        while (iter.hasNext()) {
            iter.next();
        }
        Iter.close(iter);
    } finally {
        db.close();
    }
    int count = 0;
    for (File file : spillFiles) {
        if (file.exists()) {
            count++;
        }
    }
    assertEquals(0, count);
}

Example 8 with BindingComparator

use of org.apache.jena.sparql.engine.binding.BindingComparator in project jena by apache.

the class TestSortedDataBag method testSorting.

private void testSorting(int numBindings, int threshold) {
    List<Binding> unsorted = randomBindings(numBindings);
    List<SortCondition> conditions = new ArrayList<>();
    conditions.add(new SortCondition(new ExprVar("8"), Query.ORDER_ASCENDING));
    conditions.add(new SortCondition(new ExprVar("1"), Query.ORDER_ASCENDING));
    conditions.add(new SortCondition(new ExprVar("0"), Query.ORDER_DESCENDING));
    BindingComparator comparator = new BindingComparator(conditions);
    List<Binding> sorted = new ArrayList<>();
    SortedDataBag<Binding> db = new SortedDataBag<>(new ThresholdPolicyCount<Binding>(threshold), SerializationFactoryFinder.bindingSerializationFactory(), comparator);
    try {
        db.addAll(unsorted);
        Iterator<Binding> iter = db.iterator();
        while (iter.hasNext()) {
            sorted.add(iter.next());
        }
        Iter.close(iter);
    } finally {
        db.close();
    }
    Collections.sort(unsorted, comparator);
    assertEquals(unsorted, sorted);
}

Example 9 with BindingComparator

use of org.apache.jena.sparql.engine.binding.BindingComparator in project jena by apache.

the class TestSortedDataBag method testTemporaryFilesAreCleanedUpAfterCompletion.

@Test
public void testTemporaryFilesAreCleanedUpAfterCompletion() {
    List<Binding> unsorted = randomBindings(500);
    List<SortCondition> conditions = new ArrayList<>();
    conditions.add(new SortCondition(new ExprVar("8"), Query.ORDER_ASCENDING));
    BindingComparator comparator = new BindingComparator(conditions);
    SortedDataBag<Binding> db = new SortedDataBag<>(new ThresholdPolicyCount<Binding>(10), SerializationFactoryFinder.bindingSerializationFactory(), comparator);
    List<File> spillFiles = new ArrayList<>();
    try {
        db.addAll(unsorted);
        spillFiles.addAll(db.getSpillFiles());
        int count = 0;
        for (File file : spillFiles) {
            if (file.exists()) {
                count++;
            }
        }
        // 500 bindings divided into 50 chunks (49 in files, and 1 in memory)
        assertEquals(49, count);
        Iterator<Binding> iter = db.iterator();
        while (iter.hasNext()) {
            iter.next();
        }
        Iter.close(iter);
    } finally {
        db.close();
    }
    int count = 0;
    for (File file : spillFiles) {
        if (file.exists()) {
            count++;
        }
    }
    assertEquals(0, count);
}