54 lines
1.4 KiB
Java
54 lines
1.4 KiB
Java
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package de.hsel.spm.baudas.analysis;
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import java.io.*;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.HashMap;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import weka.core.Instance;
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import weka.core.Instances;
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/**
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* @author Karsten Eden
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* @version 0.1
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* @since 0.1
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*/
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public class TopFlopArticle implements Analysis<Map<String, Integer>> {
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private Instances instances;
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private Map<String, Integer> results;
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public TopFlopArticle(File file){
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results = new HashMap<>();
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instances = load(file);
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}
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/**
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* get sum for every article and sort them asending
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* @return Map of Name of Products and Sum of Values
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*/
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public Map<String, Integer> getResult() {
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String name;
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Double sum = 0.0;
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for(int i=11; i<=25; i++) {
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for (Instance instance : instances) {
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sum += instance.value(i);
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}
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name = instances.attribute(i).name();
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results.put(name, sum.intValue());
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sum = 0.0;
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}
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//Sort Map in ascending order
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Stream<Map.Entry<String, Integer>> sorted = results.entrySet().stream().sorted(Map.Entry.comparingByValue());
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results = sorted.collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue(), (e1, e2) -> e2, LinkedHashMap::new));
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return results;
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}
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}
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