[KEYCLOAK-3372] - Code cleanup

core/src/main/java/org/keycloak/representations/adapters/config/PolicyEnforcerConfig.java

@@ -109,7 +109,6 @@ public class PolicyEnforcerConfig {
         private List<MethodConfig> methods = new ArrayList<>();
         private List<String> scopes = Collections.emptyList();
         private String id;
-        private boolean instance;
 
         @JsonIgnore
         private PathConfig parentConfig;
@@ -178,11 +177,7 @@ public class PolicyEnforcerConfig {
         }
 
         public boolean isInstance() {
-            return instance;
-        }
-
-        public void setInstance(boolean instance) {
-            this.instance = instance;
+            return this.parentConfig != null;
         }
 
         public void setParentConfig(PathConfig parentConfig) {

core/src/main/java/org/keycloak/representations/idm/authorization/PolicyRepresentation.java

@@ -16,6 +16,8 @@
  */
 package org.keycloak.representations.idm.authorization;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -35,6 +37,7 @@ public class PolicyRepresentation {
     private DecisionStrategy decisionStrategy = DecisionStrategy.UNANIMOUS;
     private Map<String, String> config = new HashMap();
     private List<PolicyRepresentation> dependentPolicies;
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private List<PolicyRepresentation> associatedPolicies = new ArrayList<>();
 
     public String getId() {