Examples with VisibilityBindingSet org.apache.rya.api.model.VisibilityBindingSet used on opensource projects

Example 81 with VisibilityBindingSet

use of org.apache.rya.api.model.VisibilityBindingSet in project incubator-rya by apache.

the class ProjectionEvaluatorTest method changesNothing.

/**
 * This Projection enumerates all of the variables that were in the query, none of them are anonymous, and
 * none of them insert constants.
 */
@Test
public void changesNothing() throws Exception {
    // Read the projection object from a SPARQL query.
    final Projection projection = getProjection("SELECT ?person ?employee ?business " + "WHERE { " + "?person <urn:talksTo> ?employee . " + "?employee <urn:worksAt> ?business . " + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    final MapBindingSet bs = new MapBindingSet();
    bs.addBinding("person", vf.createURI("urn:Alice"));
    bs.addBinding("employee", vf.createURI("urn:Bob"));
    bs.addBinding("business", vf.createURI("urn:TacoJoint"));
    final VisibilityBindingSet original = new VisibilityBindingSet(bs, "a|b");
    // Execute the projection.
    final VisibilityBindingSet result = ProjectionEvaluator.make(projection).project(original);
    assertEquals(original, result);
}

Example 82 with VisibilityBindingSet

use of org.apache.rya.api.model.VisibilityBindingSet in project incubator-rya by apache.

the class ProjectionEvaluatorTest method addsConstantBinding.

/**
 * This projection creates a Binding Set that represents a Statement and add a constant value to it.
 */
@Test
public void addsConstantBinding() throws Exception {
    // Read the projection object from a SPARQL query.
    final Projection projection = getProjection("CONSTRUCT { ?person <urn:hasGrandchild> ?grandchild } " + "WHERE {" + "?person <urn:hasChild> ?child ." + "?child <urn:hasChild> ?grandchild . " + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    MapBindingSet bs = new MapBindingSet();
    bs.addBinding("person", vf.createURI("urn:Alice"));
    bs.addBinding("child", vf.createURI("urn:Bob"));
    bs.addBinding("grandchild", vf.createURI("urn:Charlie"));
    final VisibilityBindingSet original = new VisibilityBindingSet(bs, "a|b");
    // The expected binding set represents a statement.
    bs = new MapBindingSet();
    bs.addBinding("subject", vf.createURI("urn:Alice"));
    bs.addBinding("predicate", vf.createURI("urn:hasGrandchild"));
    bs.addBinding("object", vf.createURI("urn:Charlie"));
    final VisibilityBindingSet expected = new VisibilityBindingSet(bs, "a|b");
    // Execute the projection.
    final VisibilityBindingSet result = ProjectionEvaluator.make(projection).project(original);
    assertEquals(expected, result);
}

Example 83 with VisibilityBindingSet

use of org.apache.rya.api.model.VisibilityBindingSet in project incubator-rya by apache.

the class ProjectionEvaluatorTest method dropsBinding.

/**
 * This projection drops a binding from the original Binding Set.
 */
@Test
public void dropsBinding() throws Exception {
    // Read the projection object from a SPARQL query.
    final Projection projection = getProjection("SELECT ?person " + "WHERE { " + "?person <urn:talksTo> ?employee . " + "?employee <urn:worksAt> ?business . " + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    MapBindingSet bs = new MapBindingSet();
    bs.addBinding("person", vf.createURI("urn:Alice"));
    bs.addBinding("employee", vf.createURI("urn:Bob"));
    bs.addBinding("business", vf.createURI("urn:TacoJoint"));
    final VisibilityBindingSet original = new VisibilityBindingSet(bs, "a|b");
    // The expected binding set only has the "person" binding.
    bs = new MapBindingSet();
    bs.addBinding("person", vf.createURI("urn:Alice"));
    final VisibilityBindingSet expected = new VisibilityBindingSet(bs, "a|b");
    // Execute the projection.
    final VisibilityBindingSet result = ProjectionEvaluator.make(projection).project(original);
    assertEquals(expected, result);
}

Example 84 with VisibilityBindingSet

use of org.apache.rya.api.model.VisibilityBindingSet in project incubator-rya by apache.

the class ProjectionEvaluatorTest method renameBindings.

/**
 * This Projection replaces some of the variables names with different names.
 */
@Test
public void renameBindings() throws Exception {
    // Read the projection object from a SPARQL query.
    final Projection projection = getProjection("SELECT (?person AS ?p) (?employee AS ?e) ?business " + "WHERE { " + "?person <urn:talksTo> ?employee . " + "?employee <urn:worksAt> ?business . " + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    MapBindingSet bs = new MapBindingSet();
    bs.addBinding("person", vf.createURI("urn:Alice"));
    bs.addBinding("employee", vf.createURI("urn:Bob"));
    bs.addBinding("business", vf.createURI("urn:TacoJoint"));
    final VisibilityBindingSet original = new VisibilityBindingSet(bs, "a|b");
    // The expected binding set changes the "person" binding name to "p" and "employee" to "e".
    bs = new MapBindingSet();
    bs.addBinding("p", vf.createURI("urn:Alice"));
    bs.addBinding("e", vf.createURI("urn:Bob"));
    bs.addBinding("business", vf.createURI("urn:TacoJoint"));
    final VisibilityBindingSet expected = new VisibilityBindingSet(bs, "a|b");
    // Execute the projection.
    final VisibilityBindingSet result = ProjectionEvaluator.make(projection).project(original);
    assertEquals(expected, result);
}

Example 85 with VisibilityBindingSet

use of org.apache.rya.api.model.VisibilityBindingSet in project incubator-rya by apache.

the class ProjectionObserver method parseObservation.

@Override
public Observation parseObservation(final TransactionBase tx, final Bytes row) throws Exception {
    requireNonNull(tx);
    requireNonNull(row);
    // Read the Filter metadata.
    final String projectionNodeId = BindingSetRow.makeFromShardedRow(Bytes.of(PROJECTION_PREFIX), row).getNodeId();
    final ProjectionMetadata projectionMetadata = queryDao.readProjectionMetadata(tx, projectionNodeId);
    // Read the Visibility Binding Set from the value.
    final Bytes valueBytes = tx.get(row, FluoQueryColumns.PROJECTION_BINDING_SET);
    final VisibilityBindingSet projectionBindingSet = BS_SERDE.deserialize(valueBytes);
    // Figure out which node needs to handle the new metadata.
    final String parentNodeId = projectionMetadata.getParentNodeId();
    return new Observation(projectionNodeId, projectionBindingSet, parentNodeId);
}