Ingest categorical coefficients as an object (Map) (#56)

* ingest categorial coefficients as object

* bump version

Author: aarsilv

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>cloud.eppo</groupId>
     <artifactId>eppo-server-sdk</artifactId>
-    <version>2.4.4</version>
+    <version>2.4.5</version>
 
     <name>${project.groupId}:${project.artifactId}</name>
     <description>Eppo Server-Side SDK for Java</description>

src/main/java/com/eppo/sdk/deserializer/BanditsDeserializer.java

@@ -112,11 +112,13 @@ private Map<String, BanditCategoricalAttributeCoefficients> parseCategoricalAttr
         categoricalAttributeCoefficientsArrayNode.iterator().forEachRemaining(categoricalAttributeCoefficientsNode -> {
             String attributeKey = categoricalAttributeCoefficientsNode.get("attributeKey").asText();
             Double missingValueCoefficient = categoricalAttributeCoefficientsNode.get("missingValueCoefficient").asDouble();
+
             Map<String, Double> valueCoefficients = new HashMap<>();
-            JsonNode valuesNode = categoricalAttributeCoefficientsNode.get("values");
-            valuesNode.iterator().forEachRemaining(valueNode -> {
-                String value = valueNode.get("value").asText();
-                Double coefficient = valueNode.get("coefficient").asDouble();
+            JsonNode valuesNode = categoricalAttributeCoefficientsNode.get("valueCoefficients");
+            Iterator<Map.Entry<String, JsonNode>> coefficientIterator = valuesNode.fields();
+            coefficientIterator.forEachRemaining(field -> {
+                String value = field.getKey();
+                Double coefficient = field.getValue().asDouble();
                 valueCoefficients.put(value, coefficient);
             });
 

src/test/resources/bandits/bandits-parameters-1.json

@@ -24,11 +24,11 @@
             "actionCategoricalCoefficients": [
               {
                 "attributeKey": "loyalty_tier",
-                "values": [
-                  { "value": "gold", "coefficient": 4.5 },
-                  { "value": "silver", "coefficient": 3.2 },
-                  { "value": "bronze", "coefficient": 1.9 }
-                ],
+                "valueCoefficients": {
+                  "gold": 4.5,
+                  "silver": 3.2,
+                  "bronze": 1.9
+                },
                 "missingValueCoefficient": 0.0
               }
             ],
@@ -42,10 +42,10 @@
             "subjectCategoricalCoefficients": [
               {
                 "attributeKey": "gender_identity",
-                "values": [
-                  { "value": "female", "coefficient": 0.5 },
-                  { "value": "male", "coefficient": -0.5 }
-                ],
+                "valueCoefficients": {
+                  "female": 0.5,
+                  "male": -0.5
+                },
                 "missingValueCoefficient": 2.3
               }
             ]
@@ -63,21 +63,21 @@
             "actionCategoricalCoefficients": [
               {
                 "attributeKey": "purchased_last_30_days",
-                "values": [
-                  { "value": "true", "coefficient": 9.0 },
-                  { "value": "false", "coefficient": 0.0 }
-                ],
+                "valueCoefficients": {
+                  "true": 9.0,
+                  "false": 0.0
+                },
                 "missingValueCoefficient": 0.0
               }
             ],
             "subjectNumericCoefficients": [],
             "subjectCategoricalCoefficients": [
               {
                 "attributeKey": "gender_identity",
-                "values": [
-                  { "value": "female", "coefficient": 0.0 },
-                  { "value": "male", "coefficient": 0.3 }
-                ],
+                "valueCoefficients": {
+                  "female": 0.0,
+                  "male": 0.3
+                },
                 "missingValueCoefficient": 0.45
               }
             ]