Fix Rest client of policy agent
[nonrtric.git] / policy-agent / src / test / java / org / oransc / policyagent / ApplicationTest.java
index 6905c70..66c8742 100644 (file)
@@ -46,7 +46,9 @@ import org.junit.jupiter.api.extension.ExtendWith;
 import org.oransc.policyagent.clients.AsyncRestClient;
 import org.oransc.policyagent.configuration.ApplicationConfig;
 import org.oransc.policyagent.configuration.ImmutableRicConfig;
+import org.oransc.policyagent.configuration.ImmutableWebClientConfig;
 import org.oransc.policyagent.configuration.RicConfig;
+import org.oransc.policyagent.configuration.WebClientConfig;
 import org.oransc.policyagent.controllers.PolicyInfo;
 import org.oransc.policyagent.controllers.ServiceRegistrationInfo;
 import org.oransc.policyagent.controllers.ServiceStatus;
@@ -72,11 +74,14 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
 import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 import org.springframework.web.reactive.function.client.WebClientResponseException;
 
@@ -86,7 +91,11 @@ import reactor.util.annotation.Nullable;
 
 @ExtendWith(SpringExtension.class)
 @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
-public class ApplicationTest {
+@TestPropertySource(
+    properties = { //
+        "server.ssl.key-store=./config/keystore.jks", //
+        "app.webclient.trust-store=./config/truststore.jks"})
+class ApplicationTest {
     private static final Logger logger = LoggerFactory.getLogger(ApplicationTest.class);
 
     @Autowired
@@ -107,6 +116,9 @@ public class ApplicationTest {
     @Autowired
     RicSupervision supervision;
 
+    @Autowired
+    ApplicationConfig applicationConfig;
+
     @Autowired
     Services services;
 
@@ -164,13 +176,19 @@ public class ApplicationTest {
             Duration checkInterval = Duration.ofMillis(1);
             return new ServiceSupervision(this.services, this.policies, this.getA1ClientFactory(), checkInterval);
         }
+
+        @Bean
+        public ServletWebServerFactory servletContainer() {
+            return new TomcatServletWebServerFactory();
+        }
+
     }
 
     @LocalServerPort
     private int port;
 
     @BeforeEach
-    public void reset() {
+    void reset() {
         rics.clear();
         policies.clear();
         policyTypes.clear();
@@ -179,17 +197,17 @@ public class ApplicationTest {
     }
 
     @AfterEach
-    public void verifyNoRicLocks() {
+    void verifyNoRicLocks() {
         for (Ric ric : this.rics.getRics()) {
             ric.getLock().lockBlocking(LockType.EXCLUSIVE);
             ric.getLock().unlockBlocking();
-            assertThat(ric.getLock().getLockCounter()).isEqualTo(0);
+            assertThat(ric.getLock().getLockCounter()).isZero();
             assertThat(ric.getState()).isEqualTo(Ric.RicState.AVAILABLE);
         }
     }
 
     @Test
-    public void testGetRics() throws Exception {
+    void testGetRics() throws Exception {
         addRic("ric1");
         this.addPolicyType("type1", "ric1");
         String url = "/rics?policyType=type1";
@@ -200,15 +218,17 @@ public class ApplicationTest {
         addRic("ric2");
         this.addPolicyType("", "ric2");
         url = "/rics?policyType=";
-        rsp = restClient().get(url).block();
-        assertThat(rsp).contains("ric2");
-        assertThat(rsp).doesNotContain("ric1");
-        assertThat(rsp).contains("AVAILABLE");
+
+        // This tests also validation of trusted certs restClient(true)
+        rsp = restClient(true).get(url).block();
+        assertThat(rsp).contains("ric2") //
+            .doesNotContain("ric1") //
+            .contains("AVAILABLE");
 
         // All RICs
         rsp = restClient().get("/rics").block();
-        assertThat(rsp).contains("ric2");
-        assertThat(rsp).contains("ric1");
+        assertThat(rsp).contains("ric2") //
+            .contains("ric1");
 
         // Non existing policy type
         url = "/rics?policyType=XXXX";
@@ -216,7 +236,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testSynchronization() throws Exception {
+    void testSynchronization() throws Exception {
         // Two polictypes will be put in the NearRT RICs
         PolicyTypes nearRtRicPolicyTypes = new PolicyTypes();
         nearRtRicPolicyTypes.put(createPolicyType("typeName"));
@@ -247,12 +267,12 @@ public class ApplicationTest {
         assertThat(ricPolicy.json()).isEqualTo(policy.json());
 
         // Both types should be in the agent storage after the synch
-        assertThat(ric1.getSupportedPolicyTypes().size()).isEqualTo(2);
-        assertThat(ric2.getSupportedPolicyTypes().size()).isEqualTo(2);
+        assertThat(ric1.getSupportedPolicyTypes()).hasSize(2);
+        assertThat(ric2.getSupportedPolicyTypes()).hasSize(2);
     }
 
     @Test
-    public void testGetRicForManagedElement_thenReturnCorrectRic() throws Exception {
+    void testGetRicForManagedElement_thenReturnCorrectRic() throws Exception {
         String ricName = "ric1";
         String managedElementId = "kista_1";
         addRic(ricName, managedElementId);
@@ -266,17 +286,27 @@ public class ApplicationTest {
         testErrorCode(restClient().get(url), HttpStatus.NOT_FOUND);
     }
 
-    private String putPolicyUrl(String serviceName, String ricName, String policyTypeName, String policyInstanceId) {
+    private String putPolicyUrl(String serviceName, String ricName, String policyTypeName, String policyInstanceId,
+        boolean isTransient) {
+        String url;
         if (policyTypeName.isEmpty()) {
-            return "/policy?id=" + policyInstanceId + "&ric=" + ricName + "&service=" + serviceName;
+            url = "/policy?id=" + policyInstanceId + "&ric=" + ricName + "&service=" + serviceName;
         } else {
-            return "/policy?id=" + policyInstanceId + "&ric=" + ricName + "&service=" + serviceName + "&type="
+            url = "/policy?id=" + policyInstanceId + "&ric=" + ricName + "&service=" + serviceName + "&type="
                 + policyTypeName;
         }
+        if (isTransient) {
+            url += "&transient=true";
+        }
+        return url;
+    }
+
+    private String putPolicyUrl(String serviceName, String ricName, String policyTypeName, String policyInstanceId) {
+        return putPolicyUrl(serviceName, ricName, policyTypeName, policyInstanceId, false);
     }
 
     @Test
-    public void testPutPolicy() throws Exception {
+    void testPutPolicy() throws Exception {
         String serviceName = "service1";
         String ricName = "ric1";
         String policyTypeName = "type1";
@@ -285,7 +315,8 @@ public class ApplicationTest {
         putService(serviceName);
         addPolicyType(policyTypeName, ricName);
 
-        String url = putPolicyUrl(serviceName, ricName, policyTypeName, policyInstanceId);
+        // PUT a transient policy
+        String url = putPolicyUrl(serviceName, ricName, policyTypeName, policyInstanceId, true);
         final String policyBody = jsonString();
         this.rics.getRic(ricName).setState(Ric.RicState.AVAILABLE);
 
@@ -296,16 +327,28 @@ public class ApplicationTest {
         assertThat(policy.id()).isEqualTo(policyInstanceId);
         assertThat(policy.ownerServiceName()).isEqualTo(serviceName);
         assertThat(policy.ric().name()).isEqualTo("ric1");
+        assertThat(policy.isTransient()).isTrue();
+
+        // Put a non transient policy
+        url = putPolicyUrl(serviceName, ricName, policyTypeName, policyInstanceId);
+        restClient().put(url, policyBody).block();
+        policy = policies.getPolicy(policyInstanceId);
+        assertThat(policy.isTransient()).isFalse();
 
         url = "/policies";
         String rsp = restClient().get(url).block();
-        assertThat(rsp.contains(policyInstanceId)).isTrue();
+        assertThat(rsp).as("Response contains policy instance ID.").contains(policyInstanceId);
+
+        url = "/policy?id=" + policyInstanceId;
+        rsp = restClient().get(url).block();
+        assertThat(rsp).isEqualTo(policyBody);
 
         // Test of error codes
         url = putPolicyUrl(serviceName, ricName + "XX", policyTypeName, policyInstanceId);
         testErrorCode(restClient().put(url, policyBody), HttpStatus.NOT_FOUND);
 
         url = putPolicyUrl(serviceName, ricName, policyTypeName + "XX", policyInstanceId);
+        addPolicyType(policyTypeName + "XX", "otherRic");
         testErrorCode(restClient().put(url, policyBody), HttpStatus.NOT_FOUND);
 
         url = putPolicyUrl(serviceName, ricName, policyTypeName, policyInstanceId);
@@ -316,12 +359,11 @@ public class ApplicationTest {
 
     @Test
     /**
-     * Test that HttpStatus and body from failing REST call to A1 is passed on to
-     * the caller.
+     * Test that HttpStatus and body from failing REST call to A1 is passed on to the caller.
      *
      * @throws ServiceException
      */
-    public void testErrorFromRIC() throws ServiceException {
+    void testErrorFromRic() throws ServiceException {
         putService("service1");
         addPolicyType("type1", "ric1");
 
@@ -355,7 +397,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testPutTypelessPolicy() throws Exception {
+    void testPutTypelessPolicy() throws Exception {
         putService("service1");
         addPolicyType("", "ric1");
         String url = putPolicyUrl("service1", "ric1", "", "id1");
@@ -363,14 +405,14 @@ public class ApplicationTest {
 
         String rsp = restClient().get("/policies").block();
         List<PolicyInfo> info = parseList(rsp, PolicyInfo.class);
-        assertThat(info).size().isEqualTo(1);
+        assertThat(info).hasSize(1);
         PolicyInfo policyInfo = info.get(0);
-        assertThat(policyInfo.id.equals("id1")).isTrue();
-        assertThat(policyInfo.type.equals("")).isTrue();
+        assertThat(policyInfo.id).isEqualTo("id1");
+        assertThat(policyInfo.type).isEmpty();
     }
 
     @Test
-    public void testRefuseToUpdatePolicy() throws Exception {
+    void testRefuseToUpdatePolicy() throws Exception {
         // Test that only the json can be changed for a already created policy
         // In this case service is attempted to be changed
         this.addRic("ric1");
@@ -384,7 +426,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testGetPolicy() throws Exception {
+    void testGetPolicy() throws Exception {
         String url = "/policy?id=id";
         Policy policy = addPolicy("id", "typeName", "service1", "ric1");
         {
@@ -398,7 +440,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testDeletePolicy() throws Exception {
+    void testDeletePolicy() throws Exception {
         addPolicy("id", "typeName", "service1", "ric1");
         assertThat(policies.size()).isEqualTo(1);
 
@@ -406,30 +448,30 @@ public class ApplicationTest {
         ResponseEntity<String> entity = restClient().deleteForEntity(url).block();
 
         assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.NO_CONTENT);
-        assertThat(policies.size()).isEqualTo(0);
+        assertThat(policies.size()).isZero();
 
         // Delete a non existing policy
         testErrorCode(restClient().get(url), HttpStatus.NOT_FOUND);
     }
 
     @Test
-    public void testGetPolicySchemas() throws Exception {
+    void testGetPolicySchemas() throws Exception {
         addPolicyType("type1", "ric1");
         addPolicyType("type2", "ric2");
 
         String url = "/policy_schemas";
         String rsp = this.restClient().get(url).block();
-        assertThat(rsp).contains("type1");
-        assertThat(rsp).contains("[{\"title\":\"type2\"}");
+        assertThat(rsp).contains("type1") //
+            .contains("[{\"title\":\"type2\"}");
 
         List<String> info = parseSchemas(rsp);
-        assertThat(info.size()).isEqualTo(2);
+        assertThat(info).hasSize(2);
 
         url = "/policy_schemas?ric=ric1";
         rsp = restClient().get(url).block();
         assertThat(rsp).contains("type1");
         info = parseSchemas(rsp);
-        assertThat(info.size()).isEqualTo(1);
+        assertThat(info).hasSize(1);
 
         // Get schema for non existing RIC
         url = "/policy_schemas?ric=ric1XXX";
@@ -437,15 +479,15 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testGetPolicySchema() throws Exception {
+    void testGetPolicySchema() throws Exception {
         addPolicyType("type1", "ric1");
         addPolicyType("type2", "ric2");
 
         String url = "/policy_schema?id=type1";
         String rsp = restClient().get(url).block();
         logger.info(rsp);
-        assertThat(rsp).contains("type1");
-        assertThat(rsp).contains("title");
+        assertThat(rsp).contains("type1") //
+            .contains("title");
 
         // Get non existing schema
         url = "/policy_schema?id=type1XX";
@@ -453,7 +495,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testGetPolicyTypes() throws Exception {
+    void testGetPolicyTypes() throws Exception {
         addPolicyType("type1", "ric1");
         addPolicyType("type2", "ric2");
 
@@ -471,14 +513,14 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testGetPolicies() throws Exception {
+    void testGetPolicies() throws Exception {
         addPolicy("id1", "type1", "service1");
 
         String url = "/policies";
         String rsp = restClient().get(url).block();
         logger.info(rsp);
         List<PolicyInfo> info = parseList(rsp, PolicyInfo.class);
-        assertThat(info).size().isEqualTo(1);
+        assertThat(info).hasSize(1);
         PolicyInfo policyInfo = info.get(0);
         assert (policyInfo.validate());
         assertThat(policyInfo.id).isEqualTo("id1");
@@ -487,7 +529,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testGetPoliciesFilter() throws Exception {
+    void testGetPoliciesFilter() throws Exception {
         addPolicy("id1", "type1", "service1");
         addPolicy("id2", "type1", "service2");
         addPolicy("id3", "type2", "service1");
@@ -495,16 +537,16 @@ public class ApplicationTest {
         String url = "/policies?type=type1";
         String rsp = restClient().get(url).block();
         logger.info(rsp);
-        assertThat(rsp).contains("id1");
-        assertThat(rsp).contains("id2");
-        assertThat(rsp.contains("id3")).isFalse();
+        assertThat(rsp).contains("id1") //
+            .contains("id2") //
+            .doesNotContain("id3");
 
         url = "/policies?type=type1&service=service2";
         rsp = restClient().get(url).block();
         logger.info(rsp);
-        assertThat(rsp.contains("id1")).isFalse();
-        assertThat(rsp).contains("id2");
-        assertThat(rsp.contains("id3")).isFalse();
+        assertThat(rsp).doesNotContain("id1") //
+            .contains("id2") //
+            .doesNotContain("id3");
 
         // Test get policies for non existing type
         url = "/policies?type=type1XXX";
@@ -516,7 +558,7 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testGetPolicyIdsFilter() throws Exception {
+    void testGetPolicyIdsFilter() throws Exception {
         addPolicy("id1", "type1", "service1", "ric1");
         addPolicy("id2", "type1", "service2", "ric1");
         addPolicy("id3", "type2", "service1", "ric1");
@@ -524,9 +566,9 @@ public class ApplicationTest {
         String url = "/policy_ids?type=type1";
         String rsp = restClient().get(url).block();
         logger.info(rsp);
-        assertThat(rsp).contains("id1");
-        assertThat(rsp).contains("id2");
-        assertThat(rsp.contains("id3")).isFalse();
+        assertThat(rsp).contains("id1") //
+            .contains("id2") //
+            .doesNotContain("id3");
 
         url = "/policy_ids?type=type1&service=service1&ric=ric1";
         rsp = restClient().get(url).block();
@@ -542,24 +584,25 @@ public class ApplicationTest {
     }
 
     @Test
-    public void testPutAndGetService() throws Exception {
+    void testPutAndGetService() throws Exception {
         // PUT
-        putService("name", 0, HttpStatus.CREATED);
-        putService("name", 0, HttpStatus.OK);
+        String serviceName = "name";
+        putService(serviceName, 0, HttpStatus.CREATED);
+        putService(serviceName, 0, HttpStatus.OK);
 
         // GET one service
         String url = "/services?name=name";
         String rsp = restClient().get(url).block();
         List<ServiceStatus> info = parseList(rsp, ServiceStatus.class);
-        assertThat(info.size()).isEqualTo(1);
+        assertThat(info).hasSize(1);
         ServiceStatus status = info.iterator().next();
-        assertThat(status.keepAliveIntervalSeconds).isEqualTo(0);
-        assertThat(status.serviceName).isEqualTo("name");
+        assertThat(status.keepAliveIntervalSeconds).isZero();
+        assertThat(status.serviceName).isEqualTo(serviceName);
 
         // GET (all)
         url = "/services";
         rsp = restClient().get(url).block();
-        assertThat(rsp.contains("name")).isTrue();
+        assertThat(rsp).as("Response contains service name").contains(serviceName);
         logger.info(rsp);
 
         // Keep alive
@@ -571,24 +614,24 @@ public class ApplicationTest {
         assertThat(services.size()).isEqualTo(1);
         url = "/services?name=name";
         restClient().delete(url).block();
-        assertThat(services.size()).isEqualTo(0);
+        assertThat(services.size()).isZero();
 
-        // Keep alive, no registerred service
+        // Keep alive, no registered service
         testErrorCode(restClient().put("/services/keepalive?name=name", ""), HttpStatus.NOT_FOUND);
 
         // PUT servive with bad payload
         testErrorCode(restClient().put("/service", "crap"), HttpStatus.BAD_REQUEST);
         testErrorCode(restClient().put("/service", "{}"), HttpStatus.BAD_REQUEST);
-        testErrorCode(restClient().put("/service", createServiceJson("name", -123)), HttpStatus.BAD_REQUEST);
-        testErrorCode(restClient().put("/service", createServiceJson("name", 0, "missing.portandprotocol.com")),
+        testErrorCode(restClient().put("/service", createServiceJson(serviceName, -123)), HttpStatus.BAD_REQUEST);
+        testErrorCode(restClient().put("/service", createServiceJson(serviceName, 0, "missing.portandprotocol.com")),
             HttpStatus.BAD_REQUEST);
 
-        // GET non existing servive
+        // GET non existing service
         testErrorCode(restClient().get("/services?name=XXX"), HttpStatus.NOT_FOUND);
     }
 
     @Test
-    public void testServiceSupervision() throws Exception {
+    void testServiceSupervision() throws Exception {
         putService("service1", 1, HttpStatus.CREATED);
         addPolicyType("type1", "ric1");
 
@@ -600,18 +643,18 @@ public class ApplicationTest {
         assertThat(services.size()).isEqualTo(1);
 
         // Timeout after ~1 second
-        await().untilAsserted(() -> assertThat(policies.size()).isEqualTo(0));
-        assertThat(services.size()).isEqualTo(0);
+        await().untilAsserted(() -> assertThat(policies.size()).isZero());
+        assertThat(services.size()).isZero();
     }
 
     @Test
-    public void testGetPolicyStatus() throws Exception {
+    void testGetPolicyStatus() throws Exception {
         addPolicy("id", "typeName", "service1", "ric1");
         assertThat(policies.size()).isEqualTo(1);
 
         String url = "/policy_status?id=id";
         String rsp = restClient().get(url).block();
-        assertThat(rsp.equals("OK")).isTrue();
+        assertThat(rsp).isEqualTo("OK");
 
         // GET non existing policy status
         url = "/policy_status?id=XXX";
@@ -620,14 +663,17 @@ public class ApplicationTest {
 
     private Policy addPolicy(String id, String typeName, String service, String ric) throws ServiceException {
         addRic(ric);
-        Policy p = ImmutablePolicy.builder().id(id) //
+        Policy policy = ImmutablePolicy.builder() //
+            .id(id) //
             .json(jsonString()) //
             .ownerServiceName(service) //
             .ric(rics.getRic(ric)) //
             .type(addPolicyType(typeName, ric)) //
-            .lastModified("lastModified").build();
-        policies.put(p);
-        return p;
+            .lastModified("lastModified") //
+            .isTransient(false) //
+            .build();
+        policies.put(policy);
+        return policy;
     }
 
     private Policy addPolicy(String id, String typeName, String service) throws ServiceException {
@@ -659,15 +705,15 @@ public class ApplicationTest {
     }
 
     private String baseUrl() {
-        return "http://localhost:" + port;
+        return "https://localhost:" + port;
     }
 
     private String jsonString() {
-        return "{\n  \"servingCellNrcgi\": \"1\"\n }";
+        return "{\"servingCellNrcgi\":\"1\"}";
     }
 
     @Test
-    public void testConcurrency() throws Exception {
+    void testConcurrency() throws Exception {
         final Instant startTime = Instant.now();
         List<Thread> threads = new ArrayList<>();
         a1ClientFactory.setResponseDelay(Duration.ofMillis(1));
@@ -675,22 +721,37 @@ public class ApplicationTest {
         addPolicyType("type1", "ric");
         addPolicyType("type2", "ric");
 
-        for (int i = 0; i < 100; ++i) {
-            Thread t =
+        for (int i = 0; i < 10; ++i) {
+            Thread thread =
                 new Thread(new ConcurrencyTestRunnable(baseUrl(), supervision, a1ClientFactory, rics, policyTypes),
                     "TestThread_" + i);
-            t.start();
-            threads.add(t);
+            thread.start();
+            threads.add(thread);
         }
         for (Thread t : threads) {
             t.join();
         }
-        assertThat(policies.size()).isEqualTo(0);
+        assertThat(policies.size()).isZero();
         logger.info("Concurrency test took " + Duration.between(startTime, Instant.now()));
     }
 
+    private AsyncRestClient restClient(boolean useTrustValidation) {
+        WebClientConfig config = this.applicationConfig.getWebClientConfig();
+        config = ImmutableWebClientConfig.builder() //
+            .keyStoreType(config.keyStoreType()) //
+            .keyStorePassword(config.keyStorePassword()) //
+            .keyStore(config.keyStore()) //
+            .keyPassword(config.keyPassword()) //
+            .isTrustStoreUsed(useTrustValidation) //
+            .trustStore(config.trustStore()) //
+            .trustStorePassword(config.trustStorePassword()) //
+            .build();
+
+        return new AsyncRestClient(baseUrl(), config);
+    }
+
     private AsyncRestClient restClient() {
-        return new AsyncRestClient(baseUrl());
+        return restClient(false);
     }
 
     private void testErrorCode(Mono<?> request, HttpStatus expStatus) {
@@ -704,11 +765,11 @@ public class ApplicationTest {
             .verify();
     }
 
-    private boolean checkWebClientError(Throwable t, HttpStatus expStatus, String responseContains) {
-        assertTrue(t instanceof WebClientResponseException);
-        WebClientResponseException e = (WebClientResponseException) t;
-        assertThat(e.getStatusCode()).isEqualTo(expStatus);
-        assertThat(e.getResponseBodyAsString()).contains(responseContains);
+    private boolean checkWebClientError(Throwable throwable, HttpStatus expStatus, String responseContains) {
+        assertTrue(throwable instanceof WebClientResponseException);
+        WebClientResponseException responseException = (WebClientResponseException) throwable;
+        assertThat(responseException.getStatusCode()).isEqualTo(expStatus);
+        assertThat(responseException.getResponseBodyAsString()).contains(responseContains);
         return true;
     }
 
@@ -758,8 +819,8 @@ public class ApplicationTest {
         List<T> result = new ArrayList<>();
         JsonArray jsonArr = JsonParser.parseString(jsonString).getAsJsonArray();
         for (JsonElement jsonElement : jsonArr) {
-            T o = gson.fromJson(jsonElement.toString(), clazz);
-            result.add(o);
+            T json = gson.fromJson(jsonElement.toString(), clazz);
+            result.add(json);
         }
         return result;
     }