[Java][RestClient] Enable access token refresh (#20733)

Author: wandi34

README.md

@@ -631,6 +631,7 @@ Here are some companies/projects (alphabetical order) using OpenAPI Generator in
 - [act coding](https://github.com/actcoding)
 - [Adaptant Solutions AG](https://www.adaptant.io/)
 - [adesso SE](https://www.adesso.de/)
+- [adorsys GmbH & Co.KG](https://adorsys.com/)
 - [Adyen](https://www.adyen.com/)
 - [Agoda](https://www.agoda.com/)
 - [Airthings](https://www.airthings.com/)

modules/openapi-generator/src/main/resources/Java/libraries/restclient/ApiClient.mustache

@@ -44,6 +44,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import {{javaxPackage}}.annotation.Nullable;
 
@@ -240,6 +241,21 @@ public class ApiClient{{#jsr310}} extends JavaTimeFormatter{{/jsr310}} {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username

samples/client/echo_api/java/restclient/src/main/java/org/openapitools/client/ApiClient.java

@@ -46,6 +46,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import jakarta.annotation.Nullable;
 
@@ -222,6 +223,21 @@ public void setBearerToken(String bearerToken) {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username

samples/client/others/java/restclient-useAbstractionForFiles/src/main/java/org/openapitools/client/ApiClient.java

@@ -46,6 +46,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import jakarta.annotation.Nullable;
 
@@ -220,6 +221,21 @@ public void setBearerToken(String bearerToken) {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username

samples/client/petstore/java/restclient-nullable-arrays/src/main/java/org/openapitools/client/ApiClient.java

@@ -46,6 +46,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import jakarta.annotation.Nullable;
 
@@ -220,6 +221,21 @@ public void setBearerToken(String bearerToken) {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username

samples/client/petstore/java/restclient-swagger2/src/main/java/org/openapitools/client/ApiClient.java

@@ -46,6 +46,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import jakarta.annotation.Nullable;
 
@@ -226,6 +227,21 @@ public void setBearerToken(String bearerToken) {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username

samples/client/petstore/java/restclient-useSingleRequestParameter/src/main/java/org/openapitools/client/ApiClient.java

@@ -46,6 +46,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import jakarta.annotation.Nullable;
 
@@ -226,6 +227,21 @@ public void setBearerToken(String bearerToken) {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username

samples/client/petstore/java/restclient/src/main/java/org/openapitools/client/ApiClient.java

@@ -46,6 +46,7 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 
 import jakarta.annotation.Nullable;
 
@@ -226,6 +227,21 @@ public void setBearerToken(String bearerToken) {
         throw new RuntimeException("No Bearer authentication configured!");
     }
 
+    /**
+    * Helper method to set the supplier of access tokens for Bearer authentication.
+    *
+    * @param tokenSupplier the token supplier function
+    */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        for (Authentication auth : authentications.values()) {
+            if (auth instanceof HttpBearerAuth) {
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
+            return;
+            }
+        }
+        throw new RuntimeException("No Bearer authentication configured!");
+    }
+
     /**
      * Helper method to set username for the first HTTP basic authentication.
      * @param username the username