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| 1 | +package org.eqasim.core.simulation.termination; |
| 2 | + |
| 3 | +import java.util.LinkedList; |
| 4 | +import java.util.List; |
| 5 | +import java.util.Map; |
| 6 | + |
| 7 | +import org.matsim.core.controler.TerminationCriterion; |
| 8 | + |
| 9 | +import com.google.common.base.Verify; |
| 10 | +import com.google.common.collect.ImmutableMap; |
| 11 | + |
| 12 | +public class EqasimTerminationCriterion implements TerminationCriterion { |
| 13 | + private final Map<String, TerminationIndicatorSupplier> indicators; |
| 14 | + private final Map<String, TerminationCriterionCalculator> criteria; |
| 15 | + |
| 16 | + private final List<TerminationData> history = new LinkedList<>(); |
| 17 | + |
| 18 | + private final int firstIteration; |
| 19 | + private final int lastIteration; |
| 20 | + |
| 21 | + private final TerminationWriter writer; |
| 22 | + |
| 23 | + public EqasimTerminationCriterion(int firstIteration, int lastIteration, |
| 24 | + Map<String, TerminationIndicatorSupplier> indicators, Map<String, TerminationCriterionCalculator> criteria, |
| 25 | + TerminationWriter writer) { |
| 26 | + this.firstIteration = firstIteration; |
| 27 | + this.lastIteration = lastIteration; |
| 28 | + |
| 29 | + this.indicators = indicators; |
| 30 | + this.criteria = criteria; |
| 31 | + |
| 32 | + this.writer = writer; |
| 33 | + } |
| 34 | + |
| 35 | + @Override |
| 36 | + public boolean mayTerminateAfterIteration(int iteration) { |
| 37 | + // called at the beginning of an iteration to check if we may terminate now |
| 38 | + // this happens before IterationStartsEvent |
| 39 | + |
| 40 | + boolean mayTerminate = false; |
| 41 | + |
| 42 | + if (iteration > firstIteration) { |
| 43 | + // check if we may terminate |
| 44 | + TerminationData terminationData = prepareTerminationData(iteration); |
| 45 | + history.add(terminationData); |
| 46 | + writer.write(history); |
| 47 | + |
| 48 | + mayTerminate = terminationData.criteria.values().stream().mapToDouble(d -> d).sum() == 0.0; |
| 49 | + } |
| 50 | + |
| 51 | + if (iteration >= lastIteration) { |
| 52 | + mayTerminate = true; |
| 53 | + } |
| 54 | + |
| 55 | + return mayTerminate; |
| 56 | + } |
| 57 | + |
| 58 | + @Override |
| 59 | + public boolean doTerminate(int iteration) { |
| 60 | + // called at the very end of an iteration *if* we said that we might terminate |
| 61 | + // if it is called, this happens after IterationEndsEvent |
| 62 | + |
| 63 | + // obtain data for the current iteration |
| 64 | + TerminationData terminationData = prepareTerminationData(iteration); |
| 65 | + boolean doTerminate = terminationData.criteria.values().stream().mapToDouble(d -> d).sum() == 0.0; |
| 66 | + |
| 67 | + if (iteration >= lastIteration) { |
| 68 | + doTerminate = true; |
| 69 | + } |
| 70 | + |
| 71 | + if (doTerminate) { |
| 72 | + // add information for last iteration and write it (since we won't call |
| 73 | + // mayTerminate again) |
| 74 | + history.add(terminationData); |
| 75 | + writer.write(history); |
| 76 | + } |
| 77 | + |
| 78 | + return doTerminate; |
| 79 | + } |
| 80 | + |
| 81 | + private TerminationData prepareTerminationData(int iteration) { |
| 82 | + // obtain indicator values |
| 83 | + ImmutableMap.Builder<String, Double> indicatorValues = ImmutableMap.builder(); |
| 84 | + |
| 85 | + for (var item : indicators.entrySet()) { |
| 86 | + indicatorValues.put(item.getKey(), item.getValue().getValue()); |
| 87 | + } |
| 88 | + |
| 89 | + IterationData iterationData = new IterationData(iteration - 1, indicatorValues.build()); |
| 90 | + |
| 91 | + // obtain criterion values |
| 92 | + ImmutableMap.Builder<String, Double> criterionValues = ImmutableMap.builder(); |
| 93 | + |
| 94 | + for (var item : criteria.entrySet()) { |
| 95 | + criterionValues.put(item.getKey(), item.getValue().calculate(history, iterationData)); |
| 96 | + } |
| 97 | + |
| 98 | + TerminationData terminationData = new TerminationData(iteration - 1, iterationData.indicators, |
| 99 | + criterionValues.build()); |
| 100 | + |
| 101 | + return terminationData; |
| 102 | + } |
| 103 | + |
| 104 | + public void replay(List<TerminationData> replayData) { |
| 105 | + for (int k = 0; k < replayData.size(); k++) { |
| 106 | + TerminationData item = replayData.get(k); |
| 107 | + |
| 108 | + if (item.iteration == firstIteration) { |
| 109 | + Verify.verify(k == replayData.size() - 1, |
| 110 | + "Replay data should contain iterations until (inclusive) firstIteration"); |
| 111 | + return; |
| 112 | + } |
| 113 | + } |
| 114 | + |
| 115 | + throw new IllegalStateException("Did not find iteration " + firstIteration + " in replay data"); |
| 116 | + } |
| 117 | +} |
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