enumValues) {
+ this.description = description;
+ this.defaultValue = defaultValue;
+ this.enumValues = enumValues;
+ }
+}
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/src/main/java/org/openapitools/client/StringUtil.java b/samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/src/main/java/org/openapitools/client/StringUtil.java
new file mode 100644
index 000000000000..baacf90a2b13
--- /dev/null
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/src/main/java/org/openapitools/client/StringUtil.java
@@ -0,0 +1,83 @@
+/*
+ * OpenAPI Extension x-auth-id-alias
+ * This specification shows how to use x-auth-id-alias extension for API keys.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ *
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class StringUtil {
+ /**
+ * Check if the given array contains the given value (with case-insensitive comparison).
+ *
+ * @param array The array
+ * @param value The value to search
+ * @return true if the array contains the value
+ */
+ public static boolean containsIgnoreCase(String[] array, String value) {
+ for (String str : array) {
+ if (value == null && str == null) {
+ return true;
+ }
+ if (value != null && value.equalsIgnoreCase(str)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Join an array of strings with the given separator.
+ *
+ * Note: This might be replaced by utility method from commons-lang or guava someday
+ * if one of those libraries is added as dependency.
+ *
+ *
+ * @param array The array of strings
+ * @param separator The separator
+ * @return the resulting string
+ */
+ public static String join(String[] array, String separator) {
+ int len = array.length;
+ if (len == 0) {
+ return "";
+ }
+
+ StringBuilder out = new StringBuilder();
+ out.append(array[0]);
+ for (int i = 1; i < len; i++) {
+ out.append(separator).append(array[i]);
+ }
+ return out.toString();
+ }
+
+ /**
+ * Join a list of strings with the given separator.
+ *
+ * @param list The list of strings
+ * @param separator The separator
+ * @return the resulting string
+ */
+ public static String join(Collection list, String separator) {
+ Iterator iterator = list.iterator();
+ StringBuilder out = new StringBuilder();
+ if (iterator.hasNext()) {
+ out.append(iterator.next());
+ }
+ while (iterator.hasNext()) {
+ out.append(separator).append(iterator.next());
+ }
+ return out.toString();
+ }
+}
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/src/main/java/org/openapitools/client/api/UsageApi.java b/samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/src/main/java/org/openapitools/client/api/UsageApi.java
new file mode 100644
index 000000000000..668cbec37c2d
--- /dev/null
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/src/main/java/org/openapitools/client/api/UsageApi.java
@@ -0,0 +1,287 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class UsageApi {
+ private ApiClient apiClient;
+
+ public UsageApi() {
+ this(Configuration.getDefaultApiClient());
+ }
+
+ public UsageApi(ApiClient apiClient) {
+ this.apiClient = apiClient;
+ }
+
+ /**
+ * Get the API cilent
+ *
+ * @return API client
+ */
+ public ApiClient getApiClient() {
+ return apiClient;
+ }
+
+ /**
+ * Set the API cilent
+ *
+ * @param apiClient an instance of API client
+ */
+ public void setApiClient(ApiClient apiClient) {
+ this.apiClient = apiClient;
+ }
+
+ /**
+ * Use any API key
+ * Use any API key
+ * @return Object
+ * @throws ApiException if fails to make API call
+ * @http.response.details
+
+ | Status Code | Description | Response Headers |
+ | 200 | successful operation | - |
+
+ */
+ public Object anyKey() throws ApiException {
+ return anyKeyWithHttpInfo().getData();
+ }
+
+ /**
+ * Use any API key
+ * Use any API key
+ * @return ApiResponse<Object>
+ * @throws ApiException if fails to make API call
+ * @http.response.details
+
+ | Status Code | Description | Response Headers |
+ | 200 | successful operation | - |
+
+ */
+ public ApiResponse