Ajout des recommandations. Problème de packaging Spring. J'ai une NPE, je m'en occupe demain.

@@ -25,6 +25,11 @@
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
     </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-csv</artifactId>
+            <version>1.3</version>
+        </dependency>
     </dependencies>
 
     <build>

+package org.legrog.recommendation.postprocess;
+
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVRecord;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+import java.io.*;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Properties;
+import java.util.Set;
+
+@SpringBootApplication
+public class PostprocessingApplication {
+
+    Logger logger = LoggerFactory.getLogger(getClass());
+
+    @Value("${parameters.filename}")
+    String parametersFilename;
+    @Value("${data.dir}")
+    String dataDir;
+    @Value("${collectionSample.filename}")
+    String collectionSampleFilename;
+    @Value("${ratingSample.filename}")
+    String ratingSampleFilename;
+    String sampleFilename;
+    Properties properties;
+    Set<Long> sampleItemIds;
+    Set<Long> sampleUserIds;
+    HashMap<Long, Set<Long>> sampleItemUserIds;
+
+    public static void main(String[] args) {
+        SpringApplication.run(PostprocessingApplication.class, args);
+    }
+
+    @Bean
+    public CommandLineRunner postprocess() {
+        return (args) -> this.run();
+    }
+
+    public void run() {
+        loadParametersProperties();
+        loadSampleFilename();
+        analyzeSample();
+
+    }
+
+    void analyzeSample() {
+
+        Reader in = null;
+        try {
+            sampleItemIds = new HashSet<>();
+            sampleUserIds = new HashSet<>();
+            sampleItemUserIds = new HashMap<>();
+            //
+            in = new InputStreamReader(this.getClass().getClassLoader().getResourceAsStream(dataDir + sampleFilename));
+            Iterable<CSVRecord> records = CSVFormat.TDF.withFirstRecordAsHeader().parse(in);
+            for (CSVRecord record : records) {
+                Long itemId = Long.parseLong(record.get("itemId"));
+                Long userId = Long.parseLong(record.get("userId"));
+                sampleItemIds.add(itemId);
+                sampleUserIds.add(userId);
+                if (!sampleItemUserIds.containsKey(itemId)) {
+                    Set<Long> set = sampleItemUserIds.get(itemId);
+// NPE !!!
+                    set.add(userId);
+                    sampleItemUserIds.put(itemId, set);
+                } else {
+                    Set<Long> set = new HashSet<>();
+                    set.add(userId);
+                    sampleItemUserIds.put(itemId, set);
+                }
+            }
+            logger.trace("Nombre d'objets recommandables {}", sampleItemIds.size());
+            logger.trace("Taille de la matrice item-user {}", sampleItemIds.size() * sampleUserIds.size());
+
+            int sampleCoupleCount = 0;
+            for (Long itemId : sampleItemIds) {
+                sampleCoupleCount += sampleItemUserIds.get(itemId).size();
+            }
+
+            logger.trace("Nombre de couples item-user dans l'échantillon {}", sampleCoupleCount);
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    void loadSampleFilename() {
+        if (!properties.containsKey("ratings")) {
+            return;
+        } else {
+            logger.trace("ratings {}", properties.getProperty("ratings"));
+            if (Boolean.parseBoolean(properties.getProperty("ratings"))) {
+                sampleFilename = ratingSampleFilename;
+            } else {
+                sampleFilename = collectionSampleFilename;
+            }
+
+            logger.trace("sampleFilename {}", sampleFilename);
+        }
+    }
+
+    void loadParametersProperties() {
+
+        Properties properties = new Properties();
+        InputStream in = null;
+        try {
+            in = this.getClass().getClassLoader().getResourceAsStream(dataDir + parametersFilename);
+//            in = new FileInputStream(dataDir + parametersFilename);
+            properties.load(in);
+            in.close();
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        this.properties = properties;
+    }
+
+}

+itemId	userId
+1	1
+2	2

+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <!-- encoders are assigned the type
+         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
+    <encoder>
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+    </encoder>
+  </appender>
+
+  <logger name="org.legrog" level="DEBUG"/>
+  <logger name="org.legrog.recommendation.postprocess" level="TRACE"/>
+
+  <root level="warn">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>
\ No newline at end of file

@@ -19,6 +19,7 @@
         <module>grog-entities</module>
         <module>grog-webapp</module>
         <module>grog-db-generator</module>
+        <module>grog-recommendation</module>
     </modules>
 
     <properties>