| /* |
| * 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.wayang.profiler.log; |
| |
| import org.apache.wayang.core.optimizer.costs.LoadProfileEstimator; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Random; |
| |
| /** |
| * Context for the optimization of {@link LoadProfileEstimator}s. |
| */ |
| public class OptimizationSpace { |
| |
| private final Map<String, Variable> variables = new HashMap<>(); |
| |
| private final List<Variable> variableVector = new ArrayList<>(); |
| |
| private int numDimensions = 0; |
| |
| public Variable getOrCreateVariable(String id) { |
| final Variable variable = this.variables.computeIfAbsent(id, key -> { |
| final Variable newVariable = new Variable(this.numDimensions++, key); |
| this.variableVector.add(newVariable); |
| return newVariable; |
| }); |
| |
| assert this.variables.size() == this.variableVector.size() : |
| String.format("Having %d ID-indexed and %d ordered variables after serving key \"%s\".", |
| this.variables.size(), this.variableVector.size(), id |
| ); |
| return variable; |
| } |
| |
| public Variable getVariable(String id) { |
| return this.variables.get(id); |
| } |
| |
| public Variable getVariable(int index) { |
| return this.variableVector.get(index); |
| } |
| |
| public Individual createRandomIndividual(Random random) { |
| Individual individual = new Individual(this.numDimensions); |
| for (Variable variable : variables.values()) { |
| variable.setRandomValue(individual, random); |
| } |
| return individual; |
| } |
| |
| public List<Variable> getVariables() { |
| return this.variableVector; |
| } |
| |
| public int getNumDimensions() { |
| return numDimensions; |
| } |
| } |