content: /*
   *
   *  * Copyright 2020 Alibaba Group Holding Limited.
   *  *
   *  * 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 com.alibaba.graphscope.common.ir.rel;
  
  import com.alibaba.graphscope.common.ir.tools.AliasInference;
  
  import org.apache.calcite.plan.GraphOptCluster;
  import org.apache.calcite.plan.RelOptCluster;
  import org.apache.calcite.plan.RelTraitSet;
  import org.apache.calcite.rel.RelNode;
  import org.apache.calcite.rel.RelShuttle;
  import org.apache.calcite.rel.RelWriter;
  import org.apache.calcite.rel.SingleRel;
  import org.apache.calcite.rel.type.RelDataType;
  import org.apache.calcite.rel.type.RelDataTypeField;
  import org.apache.calcite.rel.type.RelDataTypeFieldImpl;
  import org.apache.calcite.rel.type.RelRecordType;
  import org.apache.calcite.rex.RexNode;
  
  import java.util.List;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  public class GraphProcedureCall extends SingleRel {
      private final RexNode procedure;
  
      public GraphProcedureCall(
              RelOptCluster optCluster, RelTraitSet traitSet, RelNode input, RexNode procedure) {
          super(optCluster, traitSet, input);
          this.procedure = procedure;
      }
  
      @Override
      public RelWriter explainTerms(RelWriter pw) {
          return super.explainTerms(pw).item("procedure", procedure);
      }
  
      @Override
      public RelNode accept(RelShuttle shuttle) {
          if (shuttle instanceof GraphShuttle) {
              return ((GraphShuttle) shuttle).visit(this);
          }
          return shuttle.visit(this);
      }
  
      @Override
      public RelDataType deriveRowType() {
          Set<String> uniqueNameList = AliasInference.getUniqueAliasList(input, true);
          List<RelDataTypeField> reOrgFields =
                  this.procedure.getType().getFieldList().stream()
                          .map(
                                  k -> {
                                      // ensure the name is unique in the query
                                      String checkName =
                                              AliasInference.inferDefault(
                                                      k.getName(), uniqueNameList);
                                      uniqueNameList.add(checkName);
                                      return new RelDataTypeFieldImpl(
                                              checkName,
                                              ((GraphOptCluster) getCluster())
                                                      .getIdGenerator()
                                                      .generate(checkName),
                                              k.getType());
                                  })
                          .collect(Collectors.toList());
          return new RelRecordType(reOrgFields);
      }
  
      @Override
      public GraphProcedureCall copy(RelTraitSet traitSet, List<RelNode> inputs) {
          return new GraphProcedureCall(getCluster(), traitSet, sole(inputs), procedure);
      }
  
      public RexNode getProcedure() {
          return procedure;
      }
  }
  