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   * 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.asterix.algebra.operators.physical;
  
  import java.util.List;
  
  import org.apache.asterix.metadata.declared.MetadataProvider;
  import org.apache.asterix.metadata.entities.Dataset;
  import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
  import org.apache.hyracks.algebricks.core.algebra.base.IHyracksJobBuilder;
  import org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator;
  import org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext;
  import org.apache.hyracks.algebricks.core.algebra.base.LogicalVariable;
  import org.apache.hyracks.algebricks.core.algebra.base.PhysicalOperatorTag;
  import org.apache.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator;
  import org.apache.hyracks.algebricks.core.algebra.operators.logical.IOperatorSchema;
  import org.apache.hyracks.algebricks.core.algebra.operators.physical.AbstractPhysicalOperator;
  import org.apache.hyracks.algebricks.core.algebra.properties.IPhysicalPropertiesVector;
  import org.apache.hyracks.algebricks.core.algebra.properties.PhysicalRequirements;
  import org.apache.hyracks.algebricks.core.jobgen.impl.JobGenContext;
  import org.apache.hyracks.algebricks.core.jobgen.impl.JobGenHelper;
  import org.apache.hyracks.algebricks.runtime.base.IPushRuntimeFactory;
  import org.apache.hyracks.api.dataflow.value.RecordDescriptor;
  
  public class CommitPOperator extends AbstractPhysicalOperator {
  
      private final List<LogicalVariable> primaryKeyLogicalVars;
      private final Dataset dataset;
      private final boolean isSink;
  
      public CommitPOperator(Dataset dataset, List<LogicalVariable> primaryKeyLogicalVars, boolean isSink) {
          this.dataset = dataset;
          this.primaryKeyLogicalVars = primaryKeyLogicalVars;
          this.isSink = isSink;
      }
  
      @Override
      public PhysicalOperatorTag getOperatorTag() {
          return PhysicalOperatorTag.DELEGATE_OPERATOR;
      }
  
      @Override
      public String toString() {
          return "COMMIT";
      }
  
      @Override
      public PhysicalRequirements getRequiredPropertiesForChildren(ILogicalOperator op,
              IPhysicalPropertiesVector reqdByParent, IOptimizationContext context) {
          return emptyUnaryRequirements();
      }
  
      @Override
      public void computeDeliveredProperties(ILogicalOperator op, IOptimizationContext context)
              throws AlgebricksException {
          AbstractLogicalOperator op2 = (AbstractLogicalOperator) op.getInputs().get(0).getValue();
          deliveredProperties = op2.getDeliveredPhysicalProperties().clone();
      }
  
      @Override
      public void contributeRuntimeOperator(IHyracksJobBuilder builder, JobGenContext context, ILogicalOperator op,
              IOperatorSchema propagatedSchema, IOperatorSchema[] inputSchemas, IOperatorSchema outerPlanSchema)
              throws AlgebricksException {
          MetadataProvider metadataProvider = (MetadataProvider) context.getMetadataProvider();
          RecordDescriptor recDesc =
                  JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op), propagatedSchema, context);
          int[] primaryKeyFields = JobGenHelper.variablesToFieldIndexes(primaryKeyLogicalVars, inputSchemas[0]);
  
          //get dataset splits
          IPushRuntimeFactory runtime = dataset.getCommitRuntimeFactory(metadataProvider, primaryKeyFields, isSink);
          runtime.setSourceLocation(op.getSourceLocation());
          builder.contributeMicroOperator(op, runtime, recDesc);
          ILogicalOperator src = op.getInputs().get(0).getValue();
          builder.contributeGraphEdge(src, 0, op, 0);
      }
  
      @Override
      public boolean isMicroOperator() {
          return true;
      }
  
      @Override
      public boolean expensiveThanMaterialization() {
          return false;
      }
  }
  