Add support for Kotlin BeanPostProcessor beans

This commit adds support for Kotlin BeanPostProcessor beans which should
be defined in a companion object and annotated with `@JvmStatic`.

Closes gh-32946

framework-docs/src/main/java/org/springframework/docs/core/validation/validationbeanvalidationspringmethod/ApplicationConfiguration.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2002-2024 the original author or 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 org.springframework.docs.core.validation.validationbeanvalidationspringmethod;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
+
+// tag::snippet[]
+@Configuration
+public class ApplicationConfiguration {
+
+	@Bean
+	public static MethodValidationPostProcessor validationPostProcessor() {
+		return new MethodValidationPostProcessor();
+	}
+}
+// end::snippet[]

framework-docs/src/main/java/org/springframework/docs/core/validation/validationbeanvalidationspringmethodexceptions/ApplicationConfiguration.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2002-2024 the original author or 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 org.springframework.docs.core.validation.validationbeanvalidationspringmethodexceptions;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
+
+// tag::snippet[]
+@Configuration
+public class ApplicationConfiguration {
+
+	@Bean
+	public static MethodValidationPostProcessor validationPostProcessor() {
+		MethodValidationPostProcessor processor = new MethodValidationPostProcessor();
+		processor.setAdaptConstraintViolations(true);
+		return processor;
+	}
+}
+// end::snippet[]

framework-docs/src/main/kotlin/org/springframework/docs/core/validation/validationbeanvalidationspringmethod/ApplicationConfiguration.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2002-2024 the original author or 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 org.springframework.docs.core.validation.validationbeanvalidationspringmethod
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.validation.beanvalidation.MethodValidationPostProcessor
+
+// tag::snippet[]
+@Configuration
+class ApplicationConfiguration {
+
+	companion object {
+
+		@Bean
+		@JvmStatic
+		fun validationPostProcessor() = MethodValidationPostProcessor()
+	}
+}
+// end::snippet[]

framework-docs/src/main/kotlin/org/springframework/docs/core/validation/validationbeanvalidationspringmethodexceptions/ApplicationConfiguration.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2002-2024 the original author or 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 org.springframework.docs.core.validation.validationbeanvalidationspringmethodexceptions
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.validation.beanvalidation.MethodValidationPostProcessor
+
+// tag::snippet[]
+@Configuration
+class ApplicationConfiguration {
+
+	companion object {
+
+		@Bean
+		@JvmStatic
+		fun validationPostProcessor() = MethodValidationPostProcessor().apply {
+			setAdaptConstraintViolations(true)
+		}
+	}
+}
+// end::snippet[]

framework-docs/src/main/resources/org/springframework/docs/core/validation/validationbeanvalidationspringmethod/ApplicationConfiguration.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xsi:schemaLocation="
+			http://www.springframework.org/schema/beans
+			https://www.springframework.org/schema/beans/spring-beans.xsd">
+
+	<!-- tag::snippet[] -->
+	<bean class="org.springframework.validation.beanvalidation.MethodValidationPostProcessor"/>
+	<!-- end::snippet[] -->
+</beans>

framework-docs/src/main/resources/org/springframework/docs/core/validation/validationbeanvalidationspringmethodexceptions/ApplicationConfiguration.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xsi:schemaLocation="
+			http://www.springframework.org/schema/beans
+			https://www.springframework.org/schema/beans/spring-beans.xsd">
+
+	<!-- tag::snippet[] -->
+	<bean class="org.springframework.validation.beanvalidation.MethodValidationPostProcessor">
+		<property name="adaptConstraintViolations" value="true"/>
+	</bean>
+	<!-- end::snippet[] -->
+</beans>