// Copyright 2017 JanusGraph Authors
//
// Licensed 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.janusgraph.blueprints.process.traversal.strategy.optimization;
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.dsl.graph.DefaultGraphTraversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
import org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphStep;
import org.apache.tinkerpop.gremlin.process.traversal.step.util.HasContainer;
import org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.FilterRankingStrategy;
import org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.InlineFilterStrategy;
import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalStrategies;
import org.apache.tinkerpop.gremlin.structure.T;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.process.traversal.P;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.janusgraph.core.JanusGraph;
import org.janusgraph.graphdb.tinkerpop.optimize.JanusGraphStep;
import org.janusgraph.graphdb.tinkerpop.optimize.JanusGraphStepStrategy;
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 static org.apache.tinkerpop.gremlin.process.traversal.P.eq;
import static org.apache.tinkerpop.gremlin.process.traversal.P.gt;
import static org.apache.tinkerpop.gremlin.process.traversal.P.lt;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.filter;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.has;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.not;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.properties;
import static org.junit.Assert.assertEquals;
@RunWith(Parameterized.class)
public class JanusGraphStepStrategyTest {
@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 TraversalStrategies strategies = new DefaultTraversalStrategies();
strategies.addStrategies(JanusGraphStepStrategy.instance());
for (final TraversalStrategy strategy : this.otherStrategies) {
strategies.addStrategies(strategy);
}
this.original.asAdmin().setStrategies(strategies);
this.original.asAdmin().applyStrategies();
assertEquals(this.optimized, this.original);
}
private static GraphTraversal.Admin<?, ?> g_V(final Object... hasKeyValues) {
final GraphTraversal.Admin<?, ?> traversal = new DefaultGraphTraversal<>();
final JanusGraphStep<Vertex, Vertex> graphStep = new JanusGraphStep<>(new GraphStep<>(traversal, Vertex.class, true));
for (int i = 0; i < hasKeyValues.length; i = i + 2) {
if(hasKeyValues[i].equals(T.id)) {
graphStep.addIds(Arrays.asList(hasKeyValues[i + 1]));
} else {
graphStep.addHasContainer(new HasContainer((String) hasKeyValues[i], (P) hasKeyValues[i + 1]));
}
}
return traversal.addStep(graphStep);
}
@Parameterized.Parameters(name = "{0}")
public static Iterable<Object[]> generateTestParameters() {
return Arrays.asList(new Object[][]{
{__.V().out(), g_V().out(), Collections.emptyList()},
{__.V().has("name", "marko").out(), g_V("name", eq("marko")).out(), Collections.emptyList()},
{__.V().has("name", "marko").has("age", gt(31).and(lt(10))).out(),
g_V("name", eq("marko"), "age", gt(31), "age", lt(10)).out(), Collections.emptyList()},
{__.V().has("name", "marko").or(has("age"), has("age", gt(32))).has("lang", "java"),
g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))), Collections.singletonList(FilterRankingStrategy.instance())},
{__.V().has("name", "marko").as("a").or(has("age"), has("age", gt(32))).has("lang", "java"),
g_V("name", eq("marko")).as("a").or(has("age"), has("age", gt(32))).has("lang", "java"), Collections.emptyList()},
{__.V().has("name", "marko").as("a").or(has("age"), has("age", gt(32))).has("lang", "java"),
g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).as("a"), Collections.singletonList(FilterRankingStrategy.instance())},
{__.V().dedup().has("name", "marko").or(has("age"), has("age", gt(32))).has("lang", "java"),
g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).dedup(), Collections.singletonList(FilterRankingStrategy.instance())},
{__.V().as("a").dedup().has("name", "marko").or(has("age"), has("age", gt(32))).has("lang", "java"),
g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).dedup().as("a"), Collections.singletonList(FilterRankingStrategy.instance())},
{__.V().as("a").has("name", "marko").as("b").or(has("age"), has("age", gt(32))).has("lang", "java"),
g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).as("b", "a"), Collections.singletonList(FilterRankingStrategy.instance())},
{__.V().as("a").dedup().has("name", "marko").or(has("age"), has("age", gt(32))).filter(has("name", "bob")).has("lang", "java"),
g_V("name", eq("marko"), "lang", eq("java"), "name", eq("bob")).or(has("age"), has("age", gt(32))).dedup().as("a"), Arrays.asList(InlineFilterStrategy.instance(), FilterRankingStrategy.instance())},
{__.V().has("name", "marko").or(not(has("age")), has("age", gt(32))).has("name", "bob").has("lang", "java"),
g_V("name", eq("marko"), "name", eq("bob"), "lang", eq("java")).or(not(filter(properties("age"))), has("age", gt(32))), TraversalStrategies.GlobalCache.getStrategies(JanusGraph.class).toList()},
{__.V().has("name", eq("marko").and(eq("bob").and(eq("stephen")))).out("knows"),
g_V("name", eq("marko"), "name", eq("bob"), "name", eq("stephen")).out("knows"), Collections.emptyList()},
{__.V().hasId(1), g_V(T.id, 1), Collections.emptyList()},
{__.V().hasId(1).hasId(2), g_V(T.id, 1, T.id, 2), Collections.emptyList()},
{__.V().hasId(1).has("name", "marko"), g_V(T.id, 1, "name", eq("marko")), Collections.emptyList()}
});
}
}