2 files changed, 30 insertions, 2 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java b/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java
index 69a211b6..1c65be82 100644
--- a/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java
+++ b/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoder.java
@@ -38,6 +38,7 @@ import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 import java.nio.charset.StandardCharsets;
+import org.onap.policy.common.gson.MapDoubleAdapterFactory;
 
 /**
  * JSON encoder and decoder using the "standard" mechanism, which is currently gson.
@@ -47,8 +48,9 @@ public class StandardCoder implements Coder {
     /**
      * Gson object used to encode and decode messages.
      */
-    private static final Gson GSON = new GsonBuilder()
-                    .registerTypeAdapter(StandardCoderObject.class, new StandardTypeAdapter()).create();
+    private static final Gson GSON =
+                    new GsonBuilder().registerTypeAdapter(StandardCoderObject.class, new StandardTypeAdapter())
+                                    .registerTypeAdapterFactory(new MapDoubleAdapterFactory()).create();
 
     /**
      * Constructs the object.
diff --git a/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java b/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java
index 7583d776..e8e3bb60 100644
--- a/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java
+++ b/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java
@@ -43,7 +43,9 @@ import java.io.Writer;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -235,6 +237,26 @@ public class StandardCoderTest {
         assertThatThrownBy(() -> coder.fromJson(new StringReader("["), StandardCoderObject.class));
     }
 
+    @Test
+    public void testMapDouble() throws Exception {
+        MyMap map = new MyMap();
+        map.props = new HashMap<>();
+        map.props.put("plainString", "def");
+        map.props.put("negInt", -10);
+        map.props.put("doubleVal", 12.5);
+        map.props.put("posLong", 100000000000L);
+
+        String json = coder.encode(map);
+
+        map.props.clear();
+        map = coder.decode(json, MyMap.class);
+
+        assertEquals("def", map.props.get("plainString"));
+        assertEquals(-10, map.props.get("negInt"));
+        assertEquals(100000000000L, map.props.get("posLong"));
+        assertEquals(12.5, map.props.get("doubleVal"));
+    }
+
 
     private static class MyObject {
         private String abc;
@@ -244,4 +266,8 @@ public class StandardCoderTest {
             return "MyObject [abc=" + abc + "]";
         }
     }
+
+    private static class MyMap {
+        private Map<String, Object> props;
+    }
 }