33 lines
1.3 KiB
Java
33 lines
1.3 KiB
Java
package eu.ztsh.lfr.model;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import java.util.stream.Collectors;
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public class Temperatures extends ConcurrentHashMap<String, ConcurrentMap<Integer, YearDataAccumulator>> {
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public void addData(DataRow dataRow) {
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putIfAbsent(dataRow.city(), new ConcurrentHashMap<>());
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var city = get(dataRow.city());
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city.putIfAbsent(dataRow.year(), new YearDataAccumulator());
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city.get(dataRow.year()).add(dataRow.temperature());
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}
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public Averages getAverages() {
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var computed = entrySet().stream()
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.map(entry -> {
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var newEntry = entry.getValue().entrySet().stream()
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.map(yearEntry -> {
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var average = new Average();
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average.setYear(yearEntry.getKey().toString());
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average.setAverageTemperature(yearEntry.getValue().getAverage());
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return average;
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})
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.toList();
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return Map.entry(entry.getKey(), newEntry);
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}).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
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return new Averages(computed);
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}
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}
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