Add Accept Language header to validation

http-api/src/main/java/io/avaje/http/api/Valid.java

@@ -9,18 +9,23 @@
 import java.lang.annotation.Target;
 
 /**
- * Add {@code @Valid} annotation on a controller/method/BeanParam that we want bean validation to
- * be included for. When we do this controller methods that take a request payload will then have
- * the request bean (populated by JSON payload or form parameters) validated before it is passed
- * to the controller method.
- * <p>
- * When trying to validate a {@code @BeanParam} bean, this will need to be placed on the BeanParam type.
- * <p>
- * When using this annotation we need to provide an implementation of {@link Validator} to use.
- * <p>
- * Alternatively we can use the Jakarta {@code @Valid} along with a Jakarta validator implementation.
+ * Add {@code @Valid} annotation on a controller/method/BeanParam that we want bean validation to be
+ * included for. When we do this controller methods that take a request payload will then have the
+ * request bean (populated by JSON payload or form parameters) validated before it is passed to the
+ * controller method.
+ *
+ * <p>When trying to validate a {@code @BeanParam} bean, this will need to be placed on the
+ * BeanParam type.
+ *
+ * <p>When using this annotation we need to provide an implementation of {@link Validator} to use.
+ *
+ * <p>Alternatively we can use the Jakarta {@code @Valid} along with a Jakarta validator
+ * implementation.
  */
 @Retention(SOURCE)
 @Target({METHOD, TYPE, PARAMETER})
 public @interface Valid {
+
+  /** Validation groups to use */
+  Class<?>[] groups() default {};
 }

http-api/src/main/java/io/avaje/http/api/Validator.java

@@ -1,17 +1,28 @@
 package io.avaje.http.api;
 
-/**
- * Validator for form beans or request beans.
- */
+import java.util.Collection;
+import java.util.List;
+import java.util.Locale;
+import java.util.Locale.LanguageRange;
+
+/** Validator for form beans or request beans. */
 public interface Validator {
 
   /**
    * Validate the bean throwing an exception if the bean fails validation.
-   * <p>
-   * Typically the exception will be handled by a specific exception handler
-   * returning a 422 or 400 status code and usually a map of field paths to error messages.
+   *
+   * <p>Typically the exception will be handled by a specific exception handler returning a 422 or
+   * 400 status code and usually a map of field paths to error messages.
    *
    * @param bean The bean to validate
    */
-  void validate(Object bean);
+  void validate(Object bean, String acceptLanguage, Class<?>... groups) throws ValidationException;
+
+  default Locale resolveLocale(String acceptLanguage, Collection<Locale> acceptLocales) {
+    if (acceptLanguage == null) {
+      return null;
+    }
+    final List<LanguageRange> list = LanguageRange.parse(acceptLanguage);
+    return Locale.lookup(list, acceptLocales);
+  }
 }

http-client/src/test/java/org/example/webserver/HelloController$Route.java

@@ -64,16 +64,16 @@ public void registerRoutes() {
 
     ApiBuilder.post("/hello", ctx -> {
       ctx.status(201);
-      HelloDto dto = ctx.bodyAsClass(HelloDto.class);
-      validator.validate(dto);
+      final HelloDto dto = ctx.bodyAsClass(HelloDto.class);
+      validator.validate(dto, "en-us");
       ctx.json(controller.post(dto));
     });
 
     ApiBuilder.post("/hello/savebean/{foo}", ctx -> {
       ctx.status(201);
-      String foo = ctx.pathParam("foo");
-      HelloDto dto = ctx.bodyAsClass(HelloDto.class);
-      validator.validate(dto);
+      final String foo = ctx.pathParam("foo");
+      final HelloDto dto = ctx.bodyAsClass(HelloDto.class);
+      validator.validate(dto, "en-us");
       controller.saveBean(foo, dto, ctx);
     });
 
@@ -86,7 +86,7 @@ public void registerRoutes() {
       helloForm.url = ctx.formParam("url");
       helloForm.startDate = toLocalDate(ctx.formParam("startDate"));
 
-      validator.validate(helloForm);
+      validator.validate(helloForm, "en-us");
       controller.saveForm(helloForm);
     });
 
@@ -107,7 +107,7 @@ public void registerRoutes() {
       helloForm.url = ctx.formParam("url");
       helloForm.startDate = toLocalDate(ctx.formParam("startDate"));
 
-      validator.validate(helloForm);
+      validator.validate(helloForm, "en-us");
       ctx.json(controller.saveForm3(helloForm));
     });
 

http-generator-client/src/main/java/io/avaje/http/generator/client/ClientPlatformAdapter.java

@@ -34,24 +34,20 @@ public boolean isBodyMethodParam() {
   public String indent() {
     return null;
   }
-
+  // these have no meaning for client adapters
   @Override
-  public void controllerRoles(List<String> roles, ControllerReader controller) {
-
-  }
+  public void controllerRoles(List<String> roles, ControllerReader controller) {}
 
   @Override
-  public void methodRoles(List<String> roles, ControllerReader controller) {
-
-  }
+  public void methodRoles(List<String> roles, ControllerReader controller) {}
 
   @Override
-  public void writeReadParameter(Append writer, ParamType paramType, String paramName) {
-
-  }
+  public void writeReadParameter(Append writer, ParamType paramType, String paramName) {}
 
   @Override
-  public void writeReadParameter(Append writer, ParamType paramType, String paramName, String paramDefault) {
+  public void writeReadParameter(
+      Append writer, ParamType paramType, String paramName, String paramDefault) {}
 
-  }
+  @Override
+  public void writeAcceptLanguage(Append writer) {}
 }

http-generator-core/pom.xml

@@ -10,7 +10,7 @@
   <artifactId>avaje-http-generator-core</artifactId>
 
   <properties>
-    <avaje.prisms.version>1.9</avaje.prisms.version>
+    <avaje.prisms.version>1.10</avaje.prisms.version>
   </properties>
   <dependencies>
     <dependency>

http-generator-core/src/main/java/io/avaje/http/generator/core/Constants.java

@@ -19,6 +19,7 @@ public class Constants {
   static final String IMPORT_HTTP_API = "io.avaje.http.api.*";
   static final String VALIDATOR = "io.avaje.http.api.Validator";
   public static final String META_INF_COMPONENT = "META-INF/services/io.avaje.http.client.HttpClient$GeneratedComponent";
+  public static final String ACCEPT_LANGUAGE = "Accept-Language";
 
 
 }

http-generator-core/src/main/java/io/avaje/http/generator/core/ControllerReader.java

@@ -180,9 +180,7 @@ private boolean initDocHidden() {
 
   private boolean initHasValid() {
 
-    return findAnnotation(JavaxValidPrism::getOptionalOn).isPresent()
-        || findAnnotation(JakartaValidPrism::getOptionalOn).isPresent()
-        || findAnnotation(ValidPrism::getOptionalOn).isPresent();
+    return findAnnotation(ValidPrism::getOptionalOn).isPresent();
   }
 
   String produces() {

http-generator-core/src/main/java/io/avaje/http/generator/core/ElementReader.java

@@ -3,13 +3,16 @@
 import static io.avaje.http.generator.core.ParamType.RESPONSE_HANDLER;
 import static io.avaje.http.generator.core.ProcessingContext.platform;
 import static io.avaje.http.generator.core.ProcessingContext.typeElement;
+import static java.util.function.Predicate.not;
 
+import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
 
 import javax.lang.model.element.*;
+import javax.lang.model.type.TypeMirror;
 
 import io.avaje.http.generator.core.openapi.MethodDocBuilder;
 import io.avaje.http.generator.core.openapi.MethodParamDocBuilder;
@@ -39,6 +42,8 @@ public class ElementReader {
   private boolean isParamMap;
   private final Set<String> imports = new HashSet<>();
 
+  private final List<String> validationGroups = new ArrayList<>();
+
   ElementReader(Element element, ParamType defaultType, boolean formMarker) {
     this(element, null, Util.typeDef(element.asType()), defaultType, formMarker);
   }
@@ -70,6 +75,11 @@ public class ElementReader {
     if (!contextType) {
       readAnnotations(element, defaultType);
       useValidation = useValidation();
+      HttpValidPrism.getOptionalOn(element).map(HttpValidPrism::groups).stream()
+          .flatMap(List::stream)
+          .map(TypeMirror::toString)
+          .forEach(validationGroups::add);
+      this.imports.addAll(validationGroups);
     } else {
       paramType = ParamType.CONTEXT;
       useValidation = false;
@@ -138,10 +148,7 @@ private boolean useValidation() {
       return false;
     }
     final var elementType = typeElement(rawType);
-    return elementType != null
-        && (ValidPrism.isPresent(elementType)
-            || JavaxValidPrism.isPresent(elementType)
-            || JakartaValidPrism.isPresent(elementType));
+    return elementType != null && ValidPrism.isPresent(elementType);
   }
 
   private void readAnnotations(Element element, ParamType defaultType) {
@@ -276,7 +283,14 @@ void buildApiDocumentation(MethodDocBuilder methodDoc) {
   void writeValidate(Append writer) {
     if (!contextType && typeHandler == null) {
       if (useValidation) {
-        writer.append("validator.validate(%s);", varName).eol();
+        writer.append("validator.validate(%s, ", varName);
+        platform().writeAcceptLanguage(writer);
+
+        if (!validationGroups.isEmpty()) {
+          validationGroups.forEach(g -> writer.append(", %s", Util.shortName(g)));
+        }
+
+        writer.append(");").eol();
       } else {
         writer.append("// no validation required on %s", varName).eol();
       }
@@ -290,7 +304,7 @@ void writeCtxGet(Append writer, PathSegments segments) {
       // body passed as method parameter (Helidon)
       return;
     }
-    String shortType = handlerShortType();
+    final String shortType = handlerShortType();
     writer.append("%s  var %s = ", platform().indent(), varName);
     if (setValue(writer, segments, shortType)) {
       writer.append(";").eol();
@@ -320,12 +334,12 @@ private boolean setValue(Append writer, PathSegments segments, String shortType)
       return false;
     }
     if (impliedParamType) {
-      var name = matrixParamName != null ? matrixParamName : varName;
-      PathSegments.Segment segment = segments.segment(name);
+      final var name = matrixParamName != null ? matrixParamName : varName;
+      final PathSegments.Segment segment = segments.segment(name);
       if (segment != null) {
         // path or matrix parameter
-        boolean requiredParam = segment.isRequired(varName);
-        String asMethod =
+        final boolean requiredParam = segment.isRequired(varName);
+        final String asMethod =
             (typeHandler == null)
                 ? null
                 : (requiredParam) ? typeHandler.asMethod() : typeHandler.toMethod();
@@ -341,7 +355,7 @@ private boolean setValue(Append writer, PathSegments segments, String shortType)
       }
     }
 
-    String asMethod = (typeHandler == null) ? null : typeHandler.toMethod();
+    final String asMethod = (typeHandler == null) ? null : typeHandler.toMethod();
     if (asMethod != null) {
       writer.append(asMethod);
     }
@@ -380,8 +394,8 @@ private boolean setValue(Append writer, PathSegments segments, String shortType)
   }
 
   private void writeForm(Append writer, String shortType, String varName, ParamType defaultParamType) {
-    TypeElement formBeanType = typeElement(rawType);
-    BeanParamReader form = new BeanParamReader(formBeanType, varName, shortType, defaultParamType);
+    final TypeElement formBeanType = typeElement(rawType);
+    final BeanParamReader form = new BeanParamReader(formBeanType, varName, shortType, defaultParamType);
     form.write(writer);
   }
 

http-generator-core/src/main/java/io/avaje/http/generator/core/MethodReader.java

@@ -126,18 +126,12 @@ private Javadoc buildJavadoc(ExecutableElement element) {
   }
 
   private boolean initValid() {
-    return findAnnotation(ValidPrism::getOptionalOn).isPresent()
-        || findAnnotation(JavaxValidPrism::getOptionalOn).isPresent()
-        || findAnnotation(JakartaValidPrism::getOptionalOn).isPresent()
-        || superMethodHasValid();
+    return findAnnotation(ValidPrism::getOptionalOn).isPresent() || superMethodHasValid();
   }
 
   private boolean superMethodHasValid() {
     return superMethods.stream()
-        .anyMatch(
-            e ->
-                findAnnotation(ValidPrism::getOptionalOn).isPresent()
-                    || findAnnotation(JavaxValidPrism::getOptionalOn).isPresent());
+        .anyMatch(e -> findAnnotation(ValidPrism::getOptionalOn).isPresent());
   }
 
   @Override

http-generator-core/src/main/java/io/avaje/http/generator/core/PlatformAdapter.java

@@ -48,6 +48,8 @@ public interface PlatformAdapter {
   void writeReadParameter(
       Append writer, ParamType paramType, String paramName, String paramDefault);
 
+  void writeAcceptLanguage(Append writer);
+
   default void writeReadMapParameter(Append writer, ParamType paramType) {
     throw new UnsupportedOperationException("Unsupported Map Parameter");
   }

http-generator-core/src/main/java/io/avaje/http/generator/core/ValidPrism.java

@@ -0,0 +1,35 @@
+package io.avaje.http.generator.core;
+
+import java.util.Optional;
+
+import javax.lang.model.element.Element;
+
+import io.avaje.prism.GeneratePrism;
+
+@GeneratePrism(
+    value = javax.validation.Valid.class,
+    name = "JavaxValidPrism",
+    superInterfaces = ValidPrism.class)
+@GeneratePrism(
+    value = jakarta.validation.Valid.class,
+    name = "JakartaValidPrism",
+    superInterfaces = ValidPrism.class)
+@GeneratePrism(
+    value = io.avaje.http.api.Valid.class,
+    name = "HttpValidPrism",
+    superInterfaces = ValidPrism.class)
+public interface ValidPrism {
+
+  static Optional<ValidPrism> getOptionalOn(Element e) {
+    return Optional.<ValidPrism>empty()
+        .or(() -> HttpValidPrism.getOptionalOn(e))
+        .or(() -> JakartaValidPrism.getOptionalOn(e))
+        .or(() -> JavaxValidPrism.getOptionalOn(e));
+  }
+
+  static boolean isPresent(Element e) {
+    return JakartaValidPrism.isPresent(e)
+        || JavaxValidPrism.isPresent(e)
+        || HttpValidPrism.isPresent(e);
+  }
+}

http-generator-core/src/main/java/io/avaje/http/generator/core/package-info.java

@@ -35,9 +35,6 @@
 @GeneratePrism(value = io.avaje.http.api.Client.class, publicAccess = true)
 @GeneratePrism(value = io.avaje.http.api.Client.Import.class, publicAccess = true)
 @GeneratePrism(value = io.avaje.http.api.RequestTimeout.class, publicAccess = true)
-@GeneratePrism(value = javax.validation.Valid.class, name = "JavaxValidPrism")
-@GeneratePrism(value = jakarta.validation.Valid.class, name = "JakartaValidPrism")
-@GeneratePrism(value = io.avaje.http.api.Valid.class)
 package io.avaje.http.generator.core;
 
 import io.avaje.prism.GeneratePrism;

http-generator-helidon/src/main/java/io/avaje/http/generator/helidon/HelidonPlatformAdapter.java

@@ -3,6 +3,7 @@
 import java.util.List;
 
 import io.avaje.http.generator.core.Append;
+import io.avaje.http.generator.core.Constants;
 import io.avaje.http.generator.core.ControllerReader;
 import io.avaje.http.generator.core.ParamType;
 import io.avaje.http.generator.core.PlatformAdapter;
@@ -168,4 +169,9 @@ public void writeReadCollectionParameter(
         throw new UnsupportedOperationException("Unsupported MultiValue Parameter");
     }
   }
+
+  @Override
+  public void writeAcceptLanguage(Append writer) {
+    writer.append("req.headers().first(\"%s\").orElse(null)", Constants.ACCEPT_LANGUAGE);
+  }
 }

http-generator-javalin/src/main/java/io/avaje/http/generator/javalin/JavalinAdapter.java

@@ -3,6 +3,7 @@
 import java.util.List;
 
 import io.avaje.http.generator.core.Append;
+import io.avaje.http.generator.core.Constants;
 import io.avaje.http.generator.core.ControllerReader;
 import io.avaje.http.generator.core.ParamType;
 import io.avaje.http.generator.core.PlatformAdapter;
@@ -108,4 +109,9 @@ public void writeReadCollectionParameter(
     }
     writer.append("withDefault(ctx.queryParams(\"%s\"), java.util.List.of(\"%s\"))", paramName, String.join(",", paramDefault));
   }
+
+  @Override
+  public void writeAcceptLanguage(Append writer) {
+    writer.append("ctx.header(\"%s\")", Constants.ACCEPT_LANGUAGE);
+  }
 }