/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tinkerpop.gremlin.process.computer.traversal.strategy.optimization;
import org.apache.tinkerpop.gremlin.process.computer.traversal.step.map.TraversalVertexProgramStep;
import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategies;
import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.DefaultGraphTraversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
import org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.AdjacentToIncidentStrategy;
import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalStrategies;
import org.apache.tinkerpop.gremlin.structure.Column;
import org.apache.tinkerpop.gremlin.structure.Direction;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.function.Function;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.bothE;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.in;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.inE;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.out;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.outE;
import static org.apache.tinkerpop.gremlin.structure.Column.keys;
import static org.junit.Assert.assertEquals;
/**
* @author Marko A. Rodriguez (http://markorodriguez.com)
*/
@RunWith(Parameterized.class)
public class MessagePassingReductionStrategyTest {
@Parameterized.Parameter(value = 0)
public Traversal original;
@Parameterized.Parameter(value = 1)
public Traversal optimized;
@Parameterized.Parameter(value = 2)
public Collection<TraversalStrategy> otherStrategies;
@Test
public void doTest() {
final Traversal.Admin<?, ?> rootTraversal = new DefaultGraphTraversal<>();
final TraversalVertexProgramStep parent = new TraversalVertexProgramStep(rootTraversal, this.original.asAdmin());
rootTraversal.addStep(parent.asStep());
parent.setComputerTraversal(this.original.asAdmin());
final TraversalStrategies strategies = new DefaultTraversalStrategies();
strategies.addStrategies(MessagePassingReductionStrategy.instance());
for (final TraversalStrategy strategy : this.otherStrategies) {
strategies.addStrategies(strategy);
}
rootTraversal.setStrategies(strategies);
rootTraversal.asAdmin().applyStrategies();
assertEquals(this.optimized, parent.computerTraversal.get());
}
@Parameterized.Parameters(name = "{0}")
public static Iterable<Object[]> generateTestParameters() {
final Function<Traverser<Vertex>, Vertex> mapFunction = t -> t.get().vertices(Direction.OUT).next();
return Arrays.asList(new Object[][]{
{__.V().out().count(), __.V().outE().count(), Collections.singletonList(AdjacentToIncidentStrategy.instance())},
{__.V().in().count(), __.V().local(__.inE().id()).count(), Collections.singletonList(AdjacentToIncidentStrategy.instance())},
{__.V().id(), __.V().id(), Collections.emptyList()},
{__.V().local(out()), __.V().local(out()), Collections.emptyList()},
{__.V().local(in()), __.V().local(in()), Collections.emptyList()},
{__.V().local(out()).count(), __.V().local(out()).count(), Collections.emptyList()},
{__.V().local(in()).count(), __.V().local(in()).count(), Collections.emptyList()},
{__.V().out().count(), __.V().local(out().id()).count(), Collections.emptyList()},
{__.V().out().label().count(), __.V().out().label().count(), Collections.emptyList()},
{__.V().in().id(), __.V().local(in().id()), Collections.emptyList()},
{in().id(), __.local(in().id()), Collections.emptyList()}, // test inject
{__.V().out().id(), __.V().local(out().id()), Collections.emptyList()},
{__.V().both().id(), __.V().local(__.both().id()), Collections.emptyList()},
{__.V().outE().inV().id().count(), __.V().local(outE().inV().id()).count(), Collections.emptyList()},
{__.V().map(outE().inV()).count(), __.V().local(__.map(outE().inV()).id()).count(), Collections.emptyList()},
{__.V().out().map(outE().inV()).count(), __.V().out().map(outE().inV()).count(), Collections.emptyList()},
{__.V().outE().map(__.inV()).id().count(), __.V().local(__.outE().map(__.inV()).id()).count(), Collections.emptyList()},
{__.V().outE().map(__.inV()).count(), __.V().local(outE().map(__.inV()).id()).count(), Collections.emptyList()},
{__.V().outE().map(__.inV()).values("name").count(), __.V().outE().map(__.inV()).values("name").count(), Collections.emptyList()},
{__.V().outE().inV().count(), __.V().local(outE().inV().id()).count(), Collections.emptyList()},
{__.V().out().id().count(), __.V().local(out().id()).count(), Collections.emptyList()},
{__.V().in().id().count(), __.V().local(in().id()).count(), Collections.emptyList()},
{__.V().in().id().select("id-map").dedup().count(), __.V().local(in().id().select("id-map")).dedup().count(), Collections.emptyList()},
{__.V().in().id().groupCount().select(keys).unfold().dedup().count(), __.V().local(in().id()).groupCount().select(keys).unfold().dedup().count(), Collections.emptyList()},
{__.V().outE().hasLabel("knows").values("weight"), __.V().local(outE().hasLabel("knows").values("weight")), Collections.emptyList()},
{__.V().outE().values("weight").sum(), __.V().local(outE().values("weight")).sum(), Collections.emptyList()},
{__.V().inE().values("weight"), __.V().local(inE().values("weight")), Collections.emptyList()},
{__.V().inE().values("weight").sum(), __.V().local(inE().values("weight")).sum(), Collections.emptyList()},
{__.V().inE().values("weight").sum().dedup().count(), __.V().local(inE().values("weight")).sum().dedup().count(), Collections.emptyList()},
{__.V().as("a").out("knows").as("b").select("a", "b"), __.V().as("a").out("knows").as("b").select("a", "b"), Collections.emptyList()},
{__.V().out().groupCount("x").cap("x"), __.V().out().groupCount("x").cap("x"), Collections.emptyList()},
{__.V().outE().inV().groupCount().select(Column.values).unfold().dedup().count(), __.V().outE().inV().groupCount().select(Column.values).unfold().dedup().count(), Collections.emptyList()},
{__.V().outE().inV().groupCount(), __.V().outE().inV().groupCount(), Collections.emptyList()},
{__.V().outE().inV().groupCount().by("name"), __.V().outE().inV().groupCount().by("name"), Collections.emptyList()},
{__.V().inE().id().groupCount(), __.V().local(inE().id()).groupCount(), Collections.emptyList()},
{__.V().inE().values("weight").groupCount(), __.V().local(inE().values("weight")).groupCount(), Collections.emptyList()},
{__.V().outE().inV().tree(), __.V().outE().inV().tree(), Collections.emptyList()},
{__.V().in().values("name").groupCount(), __.V().in().values("name").groupCount(), Collections.emptyList()},
{__.V().outE().inV().groupCount("x"), __.V().outE().inV().groupCount("x"), Collections.emptyList()},
{__.V().in().dedup().count(), __.V().local(in().id()).dedup().count(), Collections.emptyList()},
{__.V().bothE().dedup().count(), __.V().local(bothE().id()).dedup().count(), Collections.emptyList()},
{__.V().bothE().dedup().by("name").count(), __.V().bothE().dedup().by("name").count(), Collections.emptyList()},
{__.V().map(mapFunction).inV().count(), __.V().map(mapFunction).inV().count(), Collections.emptyList()},
{__.V().groupCount().by(__.out().count()), __.V().groupCount().by(__.out().count()), Collections.emptyList()},
{__.V().identity().out().identity().count(), __.V().local(__.identity().out().identity().id()).count(), Collections.emptyList()},
{__.V().identity().out().identity().dedup().count(), __.V().local(__.identity().out().identity().id()).dedup().count(), Collections.emptyList()},
});
}
}