[Java] Generate valid code if no Authentication implementations present (#5788)

* generate valid code if no Authentication implementations present

resurrects OpenAPITools/openapi-generator#2861

* remove what I assume are human generated test cases

* need to iterate over authMethods in order to pull out name

* fix another test

* update more tests

* rename hasTokenAuthMethods to hasApiKeyAuthMethods

* remove duplicate methods, fix hasHttpBearerMethods check

* update templates

* update windows java-petstore files

* update windows java-petstore files

* re-generate

* re-generate

* restore samples.ci tests

* restore samples.ci tests

Author: jonfreedman

.generator/templates/ApiClient.mustache

@@ -53,9 +53,15 @@ import java.io.UnsupportedEncodingException;
 import java.text.DateFormat;
 
 import {{invokerPackage}}.auth.Authentication;
+{{#hasHttpBasicMethods}}
 import {{invokerPackage}}.auth.HttpBasicAuth;
+{{/hasHttpBasicMethods}}
+{{#hasHttpBearerMethods}}
 import {{invokerPackage}}.auth.HttpBearerAuth;
+{{/hasHttpBearerMethods}}
+{{#hasApiKeyMethods}}
 import {{invokerPackage}}.auth.ApiKeyAuth;
+{{/hasApiKeyMethods}}
 {{#hasOAuthMethods}}
 import {{invokerPackage}}.auth.OAuth;
 {{/hasOAuthMethods}}
@@ -267,6 +273,24 @@ public class ApiClient {
     return authentications.get(authName);
   }
 
+  {{#hasHttpBearerMethods}}
+  /**
+   * Helper method to set access token for the first Bearer authentication.
+   * @param bearerToken Bearer token
+   */
+  public void setBearerToken(String bearerToken) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof HttpBearerAuth) {
+        ((HttpBearerAuth) auth).setBearerToken(bearerToken);
+        return;
+      }
+    }
+    throw new RuntimeException("No Bearer authentication configured!");
+  }
+
+  {{/hasHttpBearerMethods}}
+
+  {{#hasHttpBasicMethods}}
   /**
    * Helper method to set username for the first HTTP basic authentication.
    * @param username Username
@@ -295,6 +319,9 @@ public class ApiClient {
     throw new RuntimeException("No HTTP basic authentication configured!");
   }
 
+  {{/hasHttpBasicMethods}}
+
+  {{#hasApiKeyMethods}}
   /**
    * Helper method to set API key value for the first API key authentication.
    * @param apiKey the API key
@@ -323,6 +350,8 @@ public class ApiClient {
     throw new RuntimeException("No API key authentication configured!");
   }
 
+  {{/hasApiKeyMethods}}
+
   {{#hasOAuthMethods}}
   /**
    * Helper method to set access token for the first OAuth2 authentication.
@@ -340,20 +369,6 @@ public class ApiClient {
 
   {{/hasOAuthMethods}}
 
-  /**
-   * Helper method to set access token for the first Bearer authentication.
-   * @param bearerToken Bearer token
-   */
-  public void setBearerToken(String bearerToken) {
-    for (Authentication auth : authentications.values()) {
-      if (auth instanceof HttpBearerAuth) {
-        ((HttpBearerAuth) auth).setBearerToken(bearerToken);
-        return;
-      }
-    }
-    throw new RuntimeException("No Bearer authentication configured!");
-  }
-
   /**
    * Set the User-Agent header's value (by adding to the default header map).
    * @param userAgent User agent

.generator/templates/libraries/resttemplate/ApiClient.mustache

@@ -66,9 +66,15 @@ import java.util.Map.Entry;
 import java.util.TimeZone;
 
 import {{invokerPackage}}.auth.Authentication;
+{{#hasHttpBasicMethods}}
 import {{invokerPackage}}.auth.HttpBasicAuth;
+{{/hasHttpBasicMethods}}
+{{#hasHttpBearerMethods}}
 import {{invokerPackage}}.auth.HttpBearerAuth;
+{{/hasHttpBearerMethods}}
+{{#hasApiKeyMethods}}
 import {{invokerPackage}}.auth.ApiKeyAuth;
+{{/hasApiKeyMethods}}
 {{#hasOAuthMethods}}
 import {{invokerPackage}}.auth.OAuth;
 {{/hasOAuthMethods}}
@@ -170,93 +176,103 @@ public class ApiClient {
         return authentications.get(authName);
     }
 
-    /**
-     * Helper method to set token for HTTP bearer authentication.
-     * @param bearerToken the token
-     */
-    public void setBearerToken(String bearerToken) {
-      for (Authentication auth : authentications.values()) {
-        if (auth instanceof HttpBearerAuth) {
-          ((HttpBearerAuth) auth).setBearerToken(bearerToken);
-          return;
-        }
+  {{#hasHttpBearerMethods}}
+  /**
+   * Helper method to set token for HTTP bearer authentication.
+   * @param bearerToken the token
+   */
+  public void setBearerToken(String bearerToken) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof HttpBearerAuth) {
+        ((HttpBearerAuth) auth).setBearerToken(bearerToken);
+        return;
       }
-      throw new RuntimeException("No Bearer authentication configured!");
     }
-
-    /**
-     * Helper method to set username for the first HTTP basic authentication.
-     * @param username the username
-     */
-    public void setUsername(String username) {
-        for (Authentication auth : authentications.values()) {
-            if (auth instanceof HttpBasicAuth) {
-                ((HttpBasicAuth) auth).setUsername(username);
-                return;
-            }
-        }
-        throw new RuntimeException("No HTTP basic authentication configured!");
+    throw new RuntimeException("No Bearer authentication configured!");
+  }
+
+  {{/hasHttpBearerMethods}}
+
+  {{#hasHttpBasicMethods}}
+  /**
+   * Helper method to set username for the first HTTP basic authentication.
+   * @param username Username
+   */
+  public void setUsername(String username) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof HttpBasicAuth) {
+        ((HttpBasicAuth) auth).setUsername(username);
+        return;
+      }
     }
-
-    /**
-     * Helper method to set password for the first HTTP basic authentication.
-     * @param password the password
-     */
-    public void setPassword(String password) {
-        for (Authentication auth : authentications.values()) {
-            if (auth instanceof HttpBasicAuth) {
-                ((HttpBasicAuth) auth).setPassword(password);
-                return;
-            }
-        }
-        throw new RuntimeException("No HTTP basic authentication configured!");
+    throw new RuntimeException("No HTTP basic authentication configured!");
+  }
+
+  /**
+   * Helper method to set password for the first HTTP basic authentication.
+   * @param password Password
+   */
+  public void setPassword(String password) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof HttpBasicAuth) {
+        ((HttpBasicAuth) auth).setPassword(password);
+        return;
+      }
     }
-
-    /**
-     * Helper method to set API key value for the first API key authentication.
-     * @param apiKey the API key
-     */
-    public void setApiKey(String apiKey) {
-        for (Authentication auth : authentications.values()) {
-            if (auth instanceof ApiKeyAuth) {
-                ((ApiKeyAuth) auth).setApiKey(apiKey);
-                return;
-            }
-        }
-        throw new RuntimeException("No API key authentication configured!");
+    throw new RuntimeException("No HTTP basic authentication configured!");
+  }
+
+  {{/hasHttpBasicMethods}}
+
+  {{#hasApiKeyMethods}}
+  /**
+   * Helper method to set API key value for the first API key authentication.
+   * @param apiKey the API key
+   */
+  public void setApiKey(String apiKey) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof ApiKeyAuth) {
+        ((ApiKeyAuth) auth).setApiKey(apiKey);
+        return;
+      }
     }
-
-    /**
-     * Helper method to set API key prefix for the first API key authentication.
-     * @param apiKeyPrefix the API key prefix
-     */
-    public void setApiKeyPrefix(String apiKeyPrefix) {
-        for (Authentication auth : authentications.values()) {
-            if (auth instanceof ApiKeyAuth) {
-                ((ApiKeyAuth) auth).setApiKeyPrefix(apiKeyPrefix);
-                return;
-            }
-        }
-        throw new RuntimeException("No API key authentication configured!");
+    throw new RuntimeException("No API key authentication configured!");
+  }
+
+  /**
+   * Helper method to set API key prefix for the first API key authentication.
+   * @param apiKeyPrefix API key prefix
+   */
+  public void setApiKeyPrefix(String apiKeyPrefix) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof ApiKeyAuth) {
+        ((ApiKeyAuth) auth).setApiKeyPrefix(apiKeyPrefix);
+        return;
+      }
     }
-
-    {{#hasOAuthMethods}}
-    /**
-     * Helper method to set access token for the first OAuth2 authentication.
-     * @param accessToken the access token
-     */
-    public void setAccessToken(String accessToken) {
-        for (Authentication auth : authentications.values()) {
-            if (auth instanceof OAuth) {
-                ((OAuth) auth).setAccessToken(accessToken);
-                return;
-            }
-        }
-        throw new RuntimeException("No OAuth2 authentication configured!");
+    throw new RuntimeException("No API key authentication configured!");
+  }
+
+  {{/hasApiKeyMethods}}
+
+  {{#hasOAuthMethods}}
+  /**
+   * Helper method to set access token for the first OAuth2 authentication.
+   * @param accessToken Access token
+   */
+  public void setAccessToken(String accessToken) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof OAuth) {
+        ((OAuth) auth).setAccessToken(accessToken);
+        return;
+      }
     }
+    throw new RuntimeException("No OAuth2 authentication configured!");
+  }
 
-    {{/hasOAuthMethods}}
-    /**
+  {{/hasOAuthMethods}}
+
+     /**
      * Set the User-Agent header's value (by adding to the default header map).
      * @param userAgent the user agent string
      * @return ApiClient this client