feature: Support validation groups with @Validated

src/main/docs/guide/httpServer/datavalidation/validationGroups.adoc

@@ -0,0 +1,27 @@
+You can enforce a subset of constraints using https://beanvalidation.org/2.0/spec/#validationapi-validatorapi-groups[validation groups] using `groups` on api:validation.Validated[]. More information is available in the https://beanvalidation.org/2.0/spec/#constraintdeclarationvalidationprocess-groupsequence[Bean Validation specification]
+
+snippet::io.micronaut.docs.datavalidation.groups.FinalValidation[tags="clazz", indent=0]
+
+<1> Define a custom validation group. This one extends `Default` so any validations done with this group will include constraints in the `Default` group.
+
+snippet::io.micronaut.docs.datavalidation.groups.Email[tags="clazz", indent=0]
+
+<1> Specify a constraint using the Default validation group. This constraint will only be enforced when `Default` is active.
+<2> Specify a constraint using the custom `FinalValidation` validation group. This constraint will only be enforced when `FinalValidation` is active.
+
+Annotate your controller with api:validation.Validated[], specifying the validation groups that will be active or letting it default to `Default`. Also annotate the binding POJO with `@Valid`.
+
+snippet::io.micronaut.docs.datavalidation.groups.EmailController[tags="imports,clazz", indent=0,title="Example"]
+
+<1> Annotating with api:validation.Validated[] without specifying groups means that the `Default` group will be active. Since this is defined on the class, it will apply to all methods.
+<2> Constraints in the `Default` validation group will be enforced, inheriting from the class. The effect is that `@NotBlank` on `email.recipient` will not be enforced when this method is called.
+<3> Specifying `groups` means that these validation groups will be enforced when this method is called.  Note that `FinalValidation` extends `Default` so constraints from both groups will be enforced.
+<4> Constraints in the `Default` and `FinalValidation` validation groups will be enforced, since `FinalValidation` extends `Default`. The effect is that both `@NotBlank` constraints in `email` will be enforced when this method is called.
+
+Validation of POJOs using the default validation group is shown in the following test:
+
+snippet::io.micronaut.docs.datavalidation.groups.EmailControllerSpec[tags="pojovalidateddefault",indent=0]
+
+Validation of POJOs using the custom `FinalValidation` validation group is shown in the following test:
+
+snippet::io.micronaut.docs.datavalidation.groups.EmailControllerSpec[tags="pojovalidatedfinal",indent=0]

src/main/docs/guide/toc.yml

@@ -90,7 +90,9 @@ httpServer:
     bodyAnnotation: Using the @Body Annotation
     reactiveResponses: Reactive Responses
   jsonBinding: JSON Binding with Jackson
-  datavalidation: Data Validation
+  datavalidation:
+    title: Data Validation
+    validationGroups: Validation Groups
   staticResources: Serving Static Resources
   errorHandling:
     title: Error Handling
@@ -288,14 +290,14 @@ i18n:
   localizedMessageSource: Localized Message Source
 appendix:
   title: Appendices
-  architecture: 
+  architecture:
     title: Micronaut Architecture
-    compilerArch: Compiler         
+    compilerArch: Compiler
     annotationArch: Annotation Metadata
     introspectionArch: Bean Introspections
     iocArch: Bean Definitions
     aopArch: AOP Proxies
-    containerArch: Application Context 
+    containerArch: Application Context
     httpServerArch: HTTP Server
   faq: Frequently Asked Questions (FAQ)
   usingsnapshots: Using Snapshots

test-suite-groovy/src/test/groovy/io/micronaut/docs/datavalidation/groups/Email.groovy

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2017-2020 original authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micronaut.docs.datavalidation.groups
+
+//tag::clazz[]
+import io.micronaut.core.annotation.Introspected
+
+import javax.validation.constraints.NotBlank
+
+@Introspected
+class Email {
+
+    @NotBlank // <1>
+    String subject
+
+    @NotBlank(groups = FinalValidation) // <2>
+    String recipient
+}
+//end::clazz[]

test-suite-groovy/src/test/groovy/io/micronaut/docs/datavalidation/groups/EmailController.groovy

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2017-2020 original authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micronaut.docs.datavalidation.groups
+
+import io.micronaut.context.annotation.Requires
+//tag::imports[]
+import io.micronaut.http.HttpResponse
+import io.micronaut.http.annotation.Body
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Post
+import io.micronaut.validation.Validated
+
+import javax.validation.Valid
+//end::imports[]
+
+@Requires(property = "spec.name", value = "datavalidationgroups")
+//tag::clazz[]
+@Validated // <1>
+@Controller("/email")
+class EmailController {
+
+    @Post("/createDraft")
+    HttpResponse createDraft(@Body @Valid Email email) { // <2>
+        HttpResponse.ok(msg: "OK")
+    }
+
+    @Post("/send")
+    @Validated(groups = [FinalValidation]) // <3>
+    HttpResponse send(@Body @Valid Email email) { // <4>
+        HttpResponse.ok(msg: "OK")
+    }
+}
+//end::clazz[]

test-suite-groovy/src/test/groovy/io/micronaut/docs/datavalidation/groups/EmailControllerSpec.groovy

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2017-2020 original authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micronaut.docs.datavalidation.groups
+
+import io.micronaut.context.ApplicationContext
+import io.micronaut.http.HttpRequest
+import io.micronaut.http.HttpStatus
+import io.micronaut.http.client.HttpClient
+import io.micronaut.http.client.exceptions.HttpClientResponseException
+import io.micronaut.runtime.server.EmbeddedServer
+import spock.lang.AutoCleanup
+import spock.lang.Shared
+import spock.lang.Specification
+
+class EmailControllerSpec extends Specification {
+
+    @Shared
+    @AutoCleanup
+    EmbeddedServer embeddedServer = ApplicationContext.run(EmbeddedServer,
+            ['spec.name': 'datavalidationgroups'],
+            "test")
+
+    @Shared
+    @AutoCleanup
+    HttpClient client = embeddedServer.applicationContext.createBean(HttpClient, embeddedServer.URL)
+
+    //tag::pojovalidateddefault[]
+    def "invoking /email/createDraft parse parameters in a POJO and validates using default validation groups"() {
+        when:
+        Email email = new Email(subject: '', recipient: '')
+        client.toBlocking().exchange(HttpRequest.POST('/email/createDraft', email))
+
+        then:
+        def e = thrown(HttpClientResponseException)
+        def response = e.response
+        response.status == HttpStatus.BAD_REQUEST
+
+        when:
+        email = new Email(subject: 'Hi', recipient: '')
+        response = client.toBlocking().exchange(HttpRequest.POST('/email/createDraft', email))
+
+        then:
+        response.status == HttpStatus.OK
+    }
+    //end::pojovalidateddefault[]
+
+    //tag::pojovalidatedfinal[]
+    def "invoking /email/send parse parameters in a POJO and validates using FinalValidation validation group"() {
+        when:
+        Email email = new Email(subject: 'Hi', recipient: '')
+        client.toBlocking().exchange(HttpRequest.POST('/email/send', email))
+
+        then:
+        def e = thrown(HttpClientResponseException)
+        def response = e.response
+        response.status == HttpStatus.BAD_REQUEST
+
+        when:
+        email = new Email(subject: 'Hi', recipient: 'me@micronaut.example')
+        response = client.toBlocking().exchange(HttpRequest.POST('/email/send', email))
+
+        then:
+        response.status == HttpStatus.OK
+    }
+    //end::pojovalidatedfinal[]
+}

test-suite-groovy/src/test/groovy/io/micronaut/docs/datavalidation/groups/FinalValidation.groovy

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2017-2020 original authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micronaut.docs.datavalidation.groups;
+
+//tag::clazz[]
+
+import javax.validation.groups.Default
+
+interface FinalValidation extends Default {} // <1>
+
+//end::clazz[]

test-suite-kotlin/src/test/kotlin/io/micronaut/docs/datavalidation/groups/Email.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2017-2020 original authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micronaut.docs.datavalidation.groups
+
+//tag::clazz[]
+import io.micronaut.core.annotation.Introspected
+import javax.validation.constraints.NotBlank
+
+@Introspected
+open class Email {
+
+    @NotBlank // <1>
+    var subject: String? = null
+
+    @NotBlank(groups = [FinalValidation::class]) // <2>
+    var recipient: String? = null
+}
+//end::clazz[]

test-suite-kotlin/src/test/kotlin/io/micronaut/docs/datavalidation/groups/EmailController.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017-2020 original authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micronaut.docs.datavalidation.groups
+
+import io.micronaut.context.annotation.Requires
+//tag::imports[]
+import io.micronaut.http.HttpResponse
+import io.micronaut.http.annotation.Body
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Post
+import io.micronaut.validation.Validated
+import javax.validation.Valid
+//end::imports[]
+
+@Requires(property = "spec.name", value = "datavalidationgroups")
+//tag::clazz[]
+@Validated // <1>
+@Controller("/email")
+open class EmailController {
+
+    @Post("/createDraft")
+    open fun createDraft(@Body @Valid email: Email): HttpResponse<*> { // <2>
+        return HttpResponse.ok(mapOf("msg" to "OK"))
+    }
+
+    @Post("/send")
+    @Validated(groups = [FinalValidation::class]) // <3>
+    open fun send(@Body @Valid email: Email): HttpResponse<*> { // <4>
+        return HttpResponse.ok(mapOf("msg" to "OK"))
+    }
+}
+//end::clazz[]