| /** |
| * 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.pinot.core.query.reduce; |
| |
| import org.apache.pinot.common.request.context.ExpressionContext; |
| import org.apache.pinot.core.query.request.context.QueryContext; |
| import org.apache.pinot.core.util.GapfillUtils; |
| |
| |
| /** |
| * Factory class to construct the right ScalableGapfillProcessor based on the query context. |
| */ |
| @SuppressWarnings("rawtypes") |
| public final class GapfillProcessorFactory { |
| private GapfillProcessorFactory() { |
| } |
| |
| /** |
| * Constructs the right result reducer based on the given query context. |
| */ |
| public static BaseGapfillProcessor getGapfillProcessor( |
| QueryContext queryContext, GapfillUtils.GapfillType gapfillType) { |
| if (gapfillType == GapfillUtils.GapfillType.AGGREGATE_GAP_FILL_AGGREGATE) { |
| if (queryContext.getSelectExpressions().size() == 2 |
| && queryContext.getSelectExpressions().get(0).getType() == ExpressionContext.Type.IDENTIFIER |
| && queryContext.getSelectExpressions().get(1).getType() == ExpressionContext.Type.FUNCTION |
| && queryContext.getSelectExpressions().get(1).getFunction().getFunctionName().equals("count")) { |
| return new CountGapfillProcessor(queryContext, gapfillType); |
| } |
| |
| int sumOrAvg = 0; |
| int groupBy = 0; |
| for (ExpressionContext expressionContext : queryContext.getSelectExpressions()) { |
| if (expressionContext.getType() == ExpressionContext.Type.FUNCTION |
| && (expressionContext.getFunction().getFunctionName().equals("sum") |
| || expressionContext.getFunction().getFunctionName().equals("avg"))) { |
| sumOrAvg++; |
| } else if (expressionContext.getType() == ExpressionContext.Type.IDENTIFIER) { |
| groupBy++; |
| } |
| } |
| if (groupBy == 1 && sumOrAvg + groupBy == queryContext.getSelectExpressions().size()) { |
| return new SumAvgGapfillProcessor(queryContext, gapfillType); |
| } |
| } |
| |
| return new GapfillProcessor(queryContext, gapfillType); |
| } |
| } |