| /* |
| * 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.bad.lang; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.asterix.bad.rules.InsertBrokerNotifierForChannelRule; |
| import org.apache.asterix.bad.rules.RewriteChannelTimeFunctionToLocalVarRule; |
| import org.apache.asterix.common.dataflow.ICcApplicationContext; |
| import org.apache.asterix.compiler.provider.DefaultRuleSetFactory; |
| import org.apache.asterix.compiler.provider.IRuleSetFactory; |
| import org.apache.asterix.optimizer.base.RuleCollections; |
| import org.apache.asterix.optimizer.rules.FeedScanCollectionToUnnest; |
| import org.apache.asterix.optimizer.rules.MetaFunctionToMetaVariableRule; |
| import org.apache.asterix.optimizer.rules.UnnestToDataScanRule; |
| import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import org.apache.hyracks.algebricks.common.utils.Pair; |
| import org.apache.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialFixpointRuleController; |
| import org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController; |
| import org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule; |
| |
| public class BADRuleSetFactory implements IRuleSetFactory { |
| |
| private boolean isSameRuleCollection(List<IAlgebraicRewriteRule> listA, List<IAlgebraicRewriteRule> listB) { |
| if (listA.size() != listB.size()) { |
| return false; |
| } |
| for (int i = 0; i < listA.size(); i++) { |
| if (!listA.get(i).getClass().equals(listB.get(i).getClass())) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private void updateNormalizationRules( |
| List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> logicalRuleSet, |
| ICcApplicationContext appCtx) { |
| // gen original normalization rules |
| List<IAlgebraicRewriteRule> originalNormalizationRules = |
| RuleCollections.buildNormalizationRuleCollection(appCtx); |
| // make a copy |
| List<IAlgebraicRewriteRule> alteredNormalizationRules = new ArrayList<>(); |
| alteredNormalizationRules.addAll(originalNormalizationRules); |
| |
| // insert the broker rule |
| for (int i = 0; i < alteredNormalizationRules.size(); i++) { |
| IAlgebraicRewriteRule rule = alteredNormalizationRules.get(i); |
| if (rule instanceof UnnestToDataScanRule) { |
| alteredNormalizationRules.add(i + 1, new InsertBrokerNotifierForChannelRule()); |
| } |
| } |
| |
| // replace all normalization rule collections with the new one |
| SequentialFixpointRuleController seqOnceCtrl = new SequentialFixpointRuleController(true); |
| for (int i = 0; i < logicalRuleSet.size(); i++) { |
| List<IAlgebraicRewriteRule> existingRuleCollection = logicalRuleSet.get(i).second; |
| if (isSameRuleCollection(existingRuleCollection, originalNormalizationRules)) { |
| logicalRuleSet.set(i, new Pair<>(seqOnceCtrl, alteredNormalizationRules)); |
| } |
| } |
| } |
| |
| private void addRewriteChannelTimeFunctionRule( |
| List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> logicalRuleSet, |
| ICcApplicationContext appCtx) { |
| // gen original normalization rules |
| List<IAlgebraicRewriteRule> originalRuleCollection = RuleCollections.buildLoadFieldsRuleCollection(appCtx); |
| // make a copy |
| List<IAlgebraicRewriteRule> alteredRuleCollection = new ArrayList<>(); |
| alteredRuleCollection.addAll(originalRuleCollection); |
| // insert the broker rule |
| for (int i = 0; i < alteredRuleCollection.size(); i++) { |
| IAlgebraicRewriteRule rule = alteredRuleCollection.get(i); |
| if (rule instanceof FeedScanCollectionToUnnest) { |
| alteredRuleCollection.add(i + 1, new MetaFunctionToMetaVariableRule()); |
| alteredRuleCollection.add(i + 1, new RewriteChannelTimeFunctionToLocalVarRule()); |
| } |
| } |
| |
| // replace all normalization rule collections with the new one |
| SequentialFixpointRuleController seqCtrlNoDfs = new SequentialFixpointRuleController(true); |
| for (int i = 0; i < logicalRuleSet.size(); i++) { |
| List<IAlgebraicRewriteRule> existingRuleCollection = logicalRuleSet.get(i).second; |
| if (isSameRuleCollection(existingRuleCollection, originalRuleCollection)) { |
| logicalRuleSet.set(i, new Pair<>(seqCtrlNoDfs, alteredRuleCollection)); |
| } |
| } |
| } |
| |
| @Override |
| public List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> getLogicalRewrites( |
| ICcApplicationContext appCtx) throws AlgebricksException { |
| List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> logicalRuleSet = |
| DefaultRuleSetFactory.buildLogical(appCtx); |
| |
| updateNormalizationRules(logicalRuleSet, appCtx); |
| addRewriteChannelTimeFunctionRule(logicalRuleSet, appCtx); |
| |
| return logicalRuleSet; |
| } |
| |
| @Override |
| public List<Pair<AbstractRuleController, List<IAlgebraicRewriteRule>>> getPhysicalRewrites( |
| ICcApplicationContext appCtx) { |
| return DefaultRuleSetFactory.buildPhysical(appCtx); |
| } |
| } |