Flere forenklinger.

simpleexample/src/main/java/simpleex/json/JacksonConfigurator.java

-package simpleex.json;
-
-import com.fasterxml.jackson.databind.Module;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.module.SimpleModule;
-import simpleex.core.LatLong;
-import simpleex.core.LatLongs;
-
-public class JacksonConfigurator {
-
-  public ObjectMapper createObjectMapper() {
-    final ObjectMapper objectMapper = new ObjectMapper();
-    configureObjectMapper(objectMapper);
-    return objectMapper;
-  }
-
-  public void configureObjectMapper(final ObjectMapper objectMapper) {
-    objectMapper.registerModule(createModule());
-  }
-
-  public Module createModule() {
-    final SimpleModule module = new SimpleModule();
-    configureModule(module);
-    return module;
-  }
-
-  public void configureModule(final SimpleModule module) {
-    module.addSerializer(LatLong.class, new LatLongSerializer());
-    module.addSerializer(LatLongs.class, new LatLongsSerializer());
-    module.addDeserializer(LatLong.class, new LatLongDeserializer());
-    module.addDeserializer(LatLongs.class, new LatLongsDeserializer());
-  }
-}

simpleexample/src/main/java/simpleex/json/LatLongsModule.java

+package simpleex.json;
+
+import com.fasterxml.jackson.core.Version;
+import com.fasterxml.jackson.databind.Module;
+import com.fasterxml.jackson.databind.module.SimpleDeserializers;
+import com.fasterxml.jackson.databind.module.SimpleSerializers;
+import simpleex.core.LatLong;
+import simpleex.core.LatLongs;
+
+public class LatLongsModule extends Module {
+
+  @Override
+  public String getModuleName() {
+    return "LatLongsModule";
+  }
+
+  @Override
+  public Version version() {
+    return Version.unknownVersion();
+  }
+
+  private final SimpleSerializers serializers = new SimpleSerializers();
+  private final SimpleDeserializers deserializers = new SimpleDeserializers();
+
+  public LatLongsModule() {
+    serializers.addSerializer(LatLong.class, new LatLongSerializer());
+    serializers.addSerializer(LatLongs.class, new LatLongsSerializer());
+    deserializers.addDeserializer(LatLong.class, new LatLongDeserializer());
+    deserializers.addDeserializer(LatLongs.class, new LatLongsDeserializer());
+  }
+
+  @Override
+  public void setupModule(final SetupContext context) {
+    context.addSerializers(serializers);
+    context.addDeserializers(deserializers);
+  }
+}

simpleexample/src/main/java/simpleex/ui/FxAppController.java

@@ -26,7 +26,24 @@ import javafx.scene.control.Slider;
 import javafx.stage.FileChooser;
 import simpleex.core.LatLong;
 import simpleex.core.LatLongs;
-import simpleex.json.JacksonConfigurator;
+import simpleex.json.LatLongsModule;
+
+/*
+@startuml
+class FxAppController
+class LatLongs
+class BorderPane
+class "ListView<LatLong>" as ListView
+class "fxmapcontrol.MapBase" as MapBase
+
+BorderPane *--> ListView: "left"
+BorderPane *--> MapBase: "center"
+
+FxAppController --> LatLongs: "latLongs"
+FxAppController --> MapBase: "mapView"
+FxAppController --> ListView: "locationListView"
+@enduml
+ */
 
 public class FxAppController {
 
@@ -189,7 +206,8 @@ public class FxAppController {
 
   public ObjectMapper getObjectMapper() {
     if (objectMapper == null) {
-      objectMapper = new JacksonConfigurator().createObjectMapper();
+      objectMapper = new ObjectMapper();
+      objectMapper.registerModule(new LatLongsModule());
     }
     return objectMapper;
   }

simpleexample/src/test/java/simpleex/json/AbstractJsonTest.java

-package simpleex.json;
-
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.junit.Assert;
-
-public abstract class AbstractJsonTest {
-
-  private final ObjectMapper objectMapper = new JacksonConfigurator().createObjectMapper();
-
-  public ObjectMapper getObjectMapper() {
-    return objectMapper;
-  }
-
-  protected void assertEqualsIgnoreWhitespace(final String expected, final String actual)
-      throws Exception {
-    Assert.assertEquals(expected, actual.replaceAll("\\s+", ""));
-  }
-}

simpleexample/src/test/java/simpleex/json/LatLongJsonTest.java

-package simpleex.json;
-
-import org.junit.Assert;
-import org.junit.Test;
-import simpleex.core.LatLong;
-
-public class LatLongJsonTest extends AbstractJsonTest {
-
-  @Test
-  public void testLatLongSerialization() throws Exception {
-    assertEqualsIgnoreWhitespace("{\"latitude\":63.1,\"longitude\":12.3}", getObjectMapper().writeValueAsString(new LatLong(63.1, 12.3)));
-  }
-
-  @Test
-  public void testLatLongObjectDeserialization() throws Exception {
-    Assert.assertEquals(new LatLong(63.1, 12.3),
-        getObjectMapper().readValue("{\"latitude\":63.1,\"longitude\":12.3}", LatLong.class));
-  }
-
-  @Test
-  public void testLatLongArrayDeserialization() throws Exception {
-    Assert.assertEquals(new LatLong(63.1, 12.3), getObjectMapper().readValue("[ 63.1, 12.3 ]", LatLong.class));
-  }
-}

simpleexample/src/test/java/simpleex/json/LatLongsJsonTest.java

 package simpleex.json;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.Assert;
 import org.junit.Test;
 import simpleex.core.LatLong;
 import simpleex.core.LatLongs;
 
-public class LatLongsJsonTest extends AbstractJsonTest {
+public class LatLongsJsonTest {
+
+  private final ObjectMapper objectMapper = new ObjectMapper();
+  {
+    objectMapper.registerModule(new LatLongsModule());
+  }
+
+  protected void assertEqualsIgnoreWhitespace(final String expected, final String actual)
+      throws Exception {
+    Assert.assertEquals(expected, actual.replaceAll("\\s+", ""));
+  }
 
   @Test
   public void testLatLongsSerialization() throws Exception {
-    assertEqualsIgnoreWhitespace(
-        "[{\"latitude\":63.1,\"longitude\":12.3},{\"latitude\":63.0,\"longitude\":12.4}]",
-        getObjectMapper().writeValueAsString(new LatLongs(new LatLong(63.1, 12.3), new LatLong(63.0, 12.4))));
+    final String actualJson = objectMapper.writeValueAsString(new LatLongs(new LatLong(63.1, 12.3), new LatLong(63.0, 12.4)));
+    final String expectedJson = "[{\"latitude\":63.1,\"longitude\":12.3},{\"latitude\":63.0,\"longitude\":12.4}]";
+    assertEqualsIgnoreWhitespace(expectedJson, actualJson);
   }
 
   @Test
   public void testLatLongsDeserialization() throws Exception {
-    final LatLongs latLongs =
-        getObjectMapper().readValue("[{\"latitude\":63.1,\"longitude\":12.3}, [63.0,12.4]]", LatLongs.class);
+    final String json = "[{\"latitude\":63.1,\"longitude\":12.3}, [63.0,12.4]]";
+    final LatLongs latLongs = objectMapper.readValue(json, LatLongs.class);
     Assert.assertEquals(2, latLongs.getLatLongCount());
     Assert.assertEquals(new LatLong(63.1, 12.3), latLongs.getLatLong(0));
     Assert.assertEquals(new LatLong(63.0, 12.4), latLongs.getLatLong(1));