Fixed serialisation of cropId and startDate

build.gradle

@@ -39,6 +39,7 @@ dependencies {
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:${junitVersion}")
     implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.13.4'
     implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.13.4'
+    implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.13.4'
 }
 
 test {

src/main/java/ch/zhaw/gartenverwaltung/io/JsonGardenPlan.java

@@ -2,8 +2,10 @@ package ch.zhaw.gartenverwaltung.io;
 
 import ch.zhaw.gartenverwaltung.types.Crop;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
 
 import java.io.File;
 import java.io.IOException;
@@ -29,9 +31,12 @@ public class JsonGardenPlan implements GardenPlan {
     private final static JavaTimeModule timeModule = new JavaTimeModule();
     private final static String INVALID_DATASOURCE_MSG = "Invalid datasource specified!";
     static {
-        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("yy-MM-dd");
+        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd");
         LocalDateDeserializer dateDeserializer = new LocalDateDeserializer(dateFormat);
+        LocalDateSerializer dateSerializer = new LocalDateSerializer(dateFormat);
+
         timeModule.addDeserializer(LocalDate.class, dateDeserializer);
+        timeModule.addSerializer(LocalDate.class, dateSerializer);
     }
 
     /**
@@ -123,6 +128,7 @@ public class JsonGardenPlan implements GardenPlan {
             try {
                 new ObjectMapper()
                         .registerModule(timeModule)
+                        .registerModule(new Jdk8Module())
                         .writeValue(new File(dataSource.toURI()), cropMap.values());
             } catch (URISyntaxException e) {
                 // TODO: Log

src/main/java/ch/zhaw/gartenverwaltung/types/Crop.java

@@ -7,7 +7,15 @@ public class Crop {
     private Long cropId = null;
     private final long plantId;
     private final LocalDate startDate;
-    private int area = 1;
+    private double area = 1;
+
+    /**
+     * Default Constructor (needed for deserialization)
+     */
+    public Crop() {
+        plantId = 0;
+        startDate = null;
+    }
 
     public Crop(long plantId, LocalDate startDate) {
         this.plantId = plantId;
@@ -19,7 +27,7 @@ public class Crop {
         this.cropId = cropId;
         return this;
     }
-    public Crop withArea(int area) {
+    public Crop withArea(double area) {
         this.area = area;
         return this;
     }
@@ -31,5 +39,14 @@ public class Crop {
 
     public long getPlantId() { return plantId; }
     public LocalDate getStartDate() { return startDate; }
-    public int getArea() { return area; }
+    public double getArea() { return area; }
+
+    @Override
+    public String toString() {
+        return String.format("Crop [ cropId: %d, plantId: %d, startDate: %s, area: %f ]",
+                cropId,
+                plantId,
+                startDate,
+                area);
+    }
 }

src/main/java/module-info.java

@@ -3,10 +3,10 @@ module ch.zhaw.gartenverwaltung {
     requires javafx.fxml;
     requires com.fasterxml.jackson.databind;
     requires com.fasterxml.jackson.datatype.jsr310;
+    requires com.fasterxml.jackson.datatype.jdk8;
 
     opens ch.zhaw.gartenverwaltung to javafx.fxml;
     opens ch.zhaw.gartenverwaltung.types to com.fasterxml.jackson.databind;
-//    opens ch.zhaw.gartenverwaltung.types to com.fasterxml.jackson.databind;
     exports ch.zhaw.gartenverwaltung;
     exports ch.zhaw.gartenverwaltung.types;
     exports ch.zhaw.gartenverwaltung.json;

src/main/resources/ch/zhaw/gartenverwaltung/io/user-crops.json

@@ -0,0 +1,20 @@
+[
+  {
+    "cropId": 0,
+    "plantId": 1,
+    "startDate": "2023-02-25",
+    "area": 0.5
+  },
+  {
+    "cropId": 1,
+    "plantId": 1,
+    "startDate": "2023-03-01",
+    "area": 0.5
+  },
+  {
+    "cropId": 2,
+    "plantId": 0,
+    "startDate": "2023-03-25",
+    "area": 1.5
+  }
+]