fix: update EvalReason class to only parse non_null attributes

Author: kaushalkapasi

src/main/java/com/devcycle/sdk/server/common/api/IDevCycleApi.java

@@ -1,11 +1,24 @@
 package com.devcycle.sdk.server.common.api;
 
-import com.devcycle.sdk.server.common.model.*;
+import java.util.Map;
+
+import com.devcycle.sdk.server.common.model.BaseVariable;
+import com.devcycle.sdk.server.common.model.DevCycleResponse;
+import com.devcycle.sdk.server.common.model.DevCycleUser;
+import com.devcycle.sdk.server.common.model.DevCycleUserAndEvents;
+import com.devcycle.sdk.server.common.model.Feature;
+import com.devcycle.sdk.server.common.model.ProjectConfig;
+import com.devcycle.sdk.server.common.model.Variable;
 import com.devcycle.sdk.server.local.model.EventsBatch;
-import retrofit2.Call;
-import retrofit2.http.*;
 
-import java.util.Map;
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.GET;
+import retrofit2.http.Header;
+import retrofit2.http.Headers;
+import retrofit2.http.POST;
+import retrofit2.http.Path;
+import retrofit2.http.Query;
 
 public interface IDevCycleApi {
     /**

src/main/java/com/devcycle/sdk/server/common/model/EvalReason.java

@@ -13,6 +13,7 @@
 @AllArgsConstructor
 @RequiredArgsConstructor
 @JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(JsonInclude.Include.NON_NULL)
 public class EvalReason {
     @Schema(description = "Evaluation reason", required = true)
     @JsonProperty("reason")
@@ -24,7 +25,6 @@ public class EvalReason {
 
     @Schema(description = "Target ID")
     @JsonProperty("target_id")
-    @JsonInclude(value=JsonInclude.Include.NON_EMPTY, content=JsonInclude.Include.NON_NULL)
     private String targetId;
 
     private EvalReason(String reason, String details) {

src/main/java/com/devcycle/sdk/server/common/model/Variable.java

@@ -3,7 +3,9 @@
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonValue;
 
 import io.swagger.v3.oas.annotations.media.Schema;
@@ -33,13 +35,14 @@ public class Variable<T> {
     @Builder.Default
     private Boolean isDefaulted = false;
 
-    @Builder.Default
-    @Deprecated()
-    private String evalReason = null;
-
     @Schema(description = "Evaluation reason")
+    @JsonProperty("eval")
     private EvalReason eval;
 
+    @Deprecated()
+    @JsonIgnore
+    private final String evalReason = null;
+
     public enum TypeEnum {
         STRING("String"),
         BOOLEAN("Boolean"),