content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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
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  package org.apache.atlas.query;
  
  import org.apache.atlas.TestModules;
  import org.apache.atlas.query.antlr4.AtlasDSLParser;
  import org.apache.atlas.query.executors.GremlinClauseToTraversalTranslator;
  import org.apache.atlas.repository.graphdb.AtlasGraph;
  import org.apache.atlas.repository.graphdb.AtlasGraphTraversal;
  import org.testng.annotations.Guice;
  import org.testng.annotations.Test;
  
  import javax.inject.Inject;
  
  import static org.testng.Assert.assertEquals;
  
  @Guice(modules = TestModules.TestOnlyModule.class)
  public class TraversalComposerTest extends BaseDSLComposer {
      @Inject
      public AtlasGraph graph;
  
      @Test
      public void queries() {
          verify("hive_db",
                  "[JanusGraphStep([],[__typeName.eq(hive_db)]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          verify("hive_db where owner = 'hdfs'",
                  "[JanusGraphStep([],[__typeName.eq(hive_db), hive_db.owner.eq(hdfs)]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          verify("DB where owner = ['hdfs', 'anon']",
                  "[JanusGraphStep([],[__typeName.eq(DB), DB.owner.within([hdfs, anon])]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          verify("hive_db where hive_db.name='Reporting' and hive_db.createTime < '2017-12-12T02:35:58.440Z'",
                  "[JanusGraphStep([],[__typeName.eq(hive_db), hive_db.name.eq(Reporting), hive_db.createTime.lt(1513046158440)]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          // note that projections are not handled in the conversion
          verify("DB as d select d.name, d.owner",
                  "[JanusGraphStep([],[__typeName.eq(DB)]), DedupGlobalStep(null,null)@[d], RangeGlobalStep(0,25)]");
  
          verify("Table groupby(owner) select name, owner, clusterName orderby name",
                  "[JanusGraphStep([],[__typeName.eq(Table), Table.owner.neq]), GroupStep(value(Table.owner),[FoldStep]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          verify("hive_column where name = 'test'",
                  "[JanusGraphStep([],[__typeName.eq(hive_column), hive_column.name.eq(test)]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          verify("hive_column where name = 'test' limit 35 offset 6",
                  "[JanusGraphStep([],[__typeName.eq(hive_column), hive_column.name.eq(test)]), DedupGlobalStep(null,null), DedupGlobalStep(null,null), RangeGlobalStep(6,41)]");
  
          verify("hive_column where name = 'test_limit'",
                  "[JanusGraphStep([],[__typeName.eq(hive_column), hive_column.name.eq(test_limit)]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
  
          verify("hive_column where name = 'test_limit' limit 2",
                  "[JanusGraphStep([],[__typeName.eq(hive_column), hive_column.name.eq(test_limit)]), DedupGlobalStep(null,null), RangeGlobalStep(0,2)]");
  
          verify("hive_column where name = 'test_limit' limit 2 offset 4",
                  "[JanusGraphStep([],[__typeName.eq(hive_column), hive_column.name.eq(test_limit)]), DedupGlobalStep(null,null), DedupGlobalStep(null,null), RangeGlobalStep(4,6)]");
  
          verify("hive_db where owner != 'hdfs'",
                  "[JanusGraphStep([],[__typeName.eq(hive_db)]), JanusGraphMultiQueryStep, NoOpBarrierStep(2500), OrStep([[JanusGraphHasStep([hive_db.owner.neq(hdfs)])], [NotStep([JanusGraphPropertiesStep([hive_db.owner],property)])]]), DedupGlobalStep(null,null), RangeGlobalStep(0,25)]");
      }
  
      private void verify(String dsl, String expected) {
          AtlasDSLParser.QueryContext queryContext = getParsedQuery(dsl);
          String                      actual       = getTraversalAsStr(queryContext);
  
          assertEquals(actual, expected, dsl);
      }
  
      private String getTraversalAsStr(AtlasDSLParser.QueryContext queryContext) {
          org.apache.atlas.query.Lookup lookup               = new TestLookup(registry);
          GremlinQueryComposer.Context  context              = new GremlinQueryComposer.Context(lookup);
          AtlasDSL.QueryMetadata        queryMetadata        = new AtlasDSL.QueryMetadata(queryContext);
          GremlinQueryComposer          gremlinQueryComposer = new GremlinQueryComposer(lookup, context, queryMetadata);
          DSLVisitor                    qv                   = new DSLVisitor(gremlinQueryComposer);
  
          qv.visit(queryContext);
  
          gremlinQueryComposer.get();
  
          AtlasGraphTraversal traversal = GremlinClauseToTraversalTranslator.run(graph, gremlinQueryComposer.clauses());
  
          return traversal.toString();
      }
  }
  