| /* |
| * 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.drill.exec.physical.config; |
| |
| import com.fasterxml.jackson.annotation.JsonCreator; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.fasterxml.jackson.annotation.JsonTypeName; |
| import org.apache.drill.exec.metastore.analyze.MetadataAggregateContext; |
| import org.apache.drill.exec.physical.base.PhysicalOperator; |
| import org.apache.drill.exec.planner.physical.AggPrelBase.OperatorPhase; |
| import org.apache.drill.shaded.guava.com.google.common.base.Preconditions; |
| |
| import java.util.Collections; |
| |
| @JsonTypeName("metadataHashAggregate") |
| public class MetadataHashAggPOP extends HashAggregate { |
| private final MetadataAggregateContext context; |
| private final OperatorPhase phase; |
| |
| @JsonCreator |
| public MetadataHashAggPOP(@JsonProperty("child") PhysicalOperator child, |
| @JsonProperty("context") MetadataAggregateContext context, |
| @JsonProperty("phase") OperatorPhase phase) { |
| super(child, phase, context.groupByExpressions(), Collections.emptyList(), 1.0F); |
| Preconditions.checkArgument(context.createNewAggregations(), |
| "Hash aggregate for metadata collecting should be used only for creating new aggregations."); |
| this.context = context; |
| this.phase = phase; |
| } |
| |
| @Override |
| protected PhysicalOperator getNewWithChild(PhysicalOperator child) { |
| return new MetadataHashAggPOP(child, context, phase); |
| } |
| |
| @JsonProperty |
| public MetadataAggregateContext getContext() { |
| return context; |
| } |
| |
| @JsonProperty |
| public OperatorPhase getPhase() { |
| return phase; |
| } |
| } |