clean constructors geoarea

src/main/java/fr/inrae/agriterix/simulator/Flow.java

 package fr.inrae.agriterix.simulator;
 
+import org.apache.commons.lang3.RandomStringUtils;
+
 import java.util.*;
 
 public class Flow {
@@ -47,7 +49,7 @@ public class Flow {
     private Stocks quantities;
     private List<Product> outputs;
     private Ratio ratio;
-    private String id;
+    private String label;
 
     public Flow(List<Input> inputs, Stocks quantities, List<Product> outputType, Ratio ratio) {
         this.inputs = inputs;
@@ -55,16 +57,16 @@ public class Flow {
         this.outputs = outputType;
         this.ratio = ratio;
         // workaround
-        this.id = "id";
+        this.label = RandomStringUtils.randomAlphanumeric(10);
     }
 
     public Flow(List<Input> inputs, Stocks quantities, List<Product> outputType, Ratio ratio,
-                String id) {
+                String label) {
         this.inputs = inputs;
         this.quantities = quantities;
         this.outputs = outputType;
         this.ratio = ratio;
-        this.id = id;
+        this.label = label;
     }
 
     public int inputsSize() {
@@ -118,16 +120,16 @@ public class Flow {
                 + "}\n";
     }
 
-    public String getId() {
-        return id;
+    public String getLabel() {
+        return label;
     }
 
     public List<Product> getOutputs() {
         return outputs;
     }
 
-    public void setId(String id) {
-        this.id = id;
+    public void setLabel(String label) {
+        this.label = label;
     }
 
     public Stocks produce() {

src/main/java/fr/inrae/agriterix/simulator/GeoArea.java

@@ -13,7 +13,7 @@ public class GeoArea {
     public GeoArea(List<Flow> flows, List<Patch> patches) {
         this.patches = patches;
         this.flows = flows;
-        this.label = "geoArea";
+        this.label = RandomStringUtils.randomAlphanumeric(10);
     }
 
     public GeoArea(List<Flow> flows, List<Patch> patches, String label) {
@@ -34,12 +34,6 @@ public class GeoArea {
         this.label = label;
     }
 
-    public GeoArea(Float surface) {
-        this.patches = new ArrayList<>();
-        this.flows = new ArrayList<>();
-        this.label = RandomStringUtils.randomAlphanumeric(10);
-    }
-
     public GeoArea(String label) {
         this.patches = new ArrayList<>();
         this.flows = new ArrayList<>();

src/main/java/fr/inrae/agriterix/simulator/dynamics/DynamicsLogger.java

@@ -44,7 +44,7 @@ public class DynamicsLogger {
         }
 
         public void logEvolutions(int timestep, Flow flow, String category, Product product, Float value) {
-                logger.info(timestep + separator + category + separator + flow.getId() + separator + product
+                logger.info(timestep + separator + category + separator + flow.getLabel() + separator + product
                         + separator + value);
         }
 }