/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.planner;
import io.crate.planner.symbol.Aggregation;
import io.crate.planner.symbol.DataTypeSymbol;
import io.crate.planner.symbol.InputColumn;
import io.crate.planner.symbol.Symbol;
import java.util.*;
public class PlannerContext {
final int numGroupKeys;
List<Aggregation> aggregations = new ArrayList<>();
List<DataTypeSymbol> groupBy;
Aggregation.Step[] steps;
int stepIdx = 0;
Symbol parent;
Map<Symbol, InputColumn> toCollectAllocation = new LinkedHashMap<>();
Map<Symbol, Symbol> resolvedSymbols = new HashMap<>();
List<Symbol> orderBy = new ArrayList<>();
List<Symbol> outputs = new ArrayList<>();
List<Symbol> originalGroupBy;
public PlannerContext(int numGroupKeys, int numAggregationSteps) {
this.numGroupKeys = numGroupKeys;
this.groupBy = new ArrayList<>(numGroupKeys);
switch (numAggregationSteps) {
case 0:
this.steps = null;
break;
case 1:
this.steps = new Aggregation.Step[]{Aggregation.Step.FINAL};
break;
case 2:
this.steps = new Aggregation.Step[]{Aggregation.Step.PARTIAL, Aggregation.Step.FINAL};
break;
default:
throw new IllegalArgumentException("Invalid number of aggregation steps");
}
}
public Aggregation.Step step() {
return steps[stepIdx];
}
DataTypeSymbol allocateToCollect(Symbol symbol) {
InputColumn inputColumn = toCollectAllocation.get(symbol);
if (inputColumn == null) {
inputColumn = new InputColumn(toCollectAllocation.size(), DataTypeVisitor.fromSymbol(symbol));
toCollectAllocation.put(symbol, inputColumn);
}
return inputColumn;
}
}