Allows List or String in topics-filter-regex

src/main/java/org/akhq/configs/Group.java

@@ -9,5 +9,5 @@
 public class Group {
     String name;
     List<String> roles;
-    Map<String, Object> attributes;
+    Map<String, List<String>> attributes;
 }

src/main/java/org/akhq/utils/UserGroupUtils.java

@@ -53,7 +53,7 @@ public Map<String, Object> getUserAttributes(List<String> groups) {
             .flatMap(group -> (group.getAttributes() != null) ? group.getAttributes().entrySet().stream() : null)
             .collect(Collectors.toMap(
                 Map.Entry::getKey,
-                item -> new ArrayList<>(Collections.singletonList(item.getValue())),
+                item -> new ArrayList<>(item.getValue()),
                 (e1, e2) -> {
                     ((List) e1).addAll((List) e2); return e1;
                 }

src/test/java/org/akhq/configs/UserGroupUtilsTest.java

@@ -0,0 +1,73 @@
+package org.akhq.configs;
+
+import io.micronaut.context.ApplicationContext;
+import org.akhq.utils.UserGroupUtils;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertIterableEquals;
+
+public class UserGroupUtilsTest {
+    @Test
+    void testTopicRegexpAsString() {
+        ApplicationContext ctx = ApplicationContext.run(ApplicationContext.class,"filterregex");
+
+        UserGroupUtils userGroupUtils = ctx.getBean(UserGroupUtils.class);
+
+        List<String> actual = (List<String>)userGroupUtils.getUserAttributes(List.of("as-string")).get("topicsFilterRegexp");
+
+        assertEquals(
+                1,
+                actual.size()
+        );
+        assertIterableEquals(
+                List.of("test.*"),
+                actual
+        );
+
+        ctx.close();
+    }
+
+    @Test
+    void testTopicRegexpAsList() {
+
+        ApplicationContext ctx = ApplicationContext.run(ApplicationContext.class,"filterregex");
+
+        UserGroupUtils userGroupUtils = ctx.getBean(UserGroupUtils.class);
+
+        List<String> actual = (List<String>)userGroupUtils.getUserAttributes(List.of("as-list")).get("topicsFilterRegexp");
+
+        assertEquals(
+                2,
+                actual.size()
+        );
+        assertIterableEquals(
+                List.of("item1","item2"),
+                actual
+        );
+
+        ctx.close();
+    }
+    @Test
+    void testTopicRegexpAsMixed() {
+
+        ApplicationContext ctx = ApplicationContext.run(ApplicationContext.class,"filterregex");
+
+        UserGroupUtils userGroupUtils = ctx.getBean(UserGroupUtils.class);
+
+        List<String> actual = (List<String>)userGroupUtils.getUserAttributes(List.of("as-string","as-list")).get("topicsFilterRegexp");
+
+        assertEquals(
+                3,
+                actual.size()
+        );
+        assertIterableEquals(
+                List.of("test.*","item1","item2"),
+                actual
+        );
+
+        ctx.close();
+    }
+}

src/test/resources/application-filterregex.yml

@@ -0,0 +1,15 @@
+akhq:
+  security:
+    groups:
+      as-string:
+        roles:
+          - topic/read
+        attributes:
+          topics-filter-regexp: "test.*"
+      as-list:
+        roles:
+          - topic/read
+        attributes:
+          topics-filter-regexp:
+            - "item1"
+            - "item2"