Add @FunctionalInterface to remaining public and protected interfaces

See gh-6857

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/HeapdumpMvcEndpoint.java

@@ -168,6 +168,7 @@ public class HeapdumpMvcEndpoint extends AbstractNamedMvcEndpoint {
 	/**
 	 * Strategy interface used to dump the heap to a file.
 	 */
+	@FunctionalInterface
 	protected interface HeapDumper {
 
 		/**

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/NamePatternFilter.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -76,7 +76,7 @@ abstract class NamePatternFilter<T> {
 	/**
 	 * Callback used to add a name.
 	 */
-	protected interface NameCallback {
+	interface NameCallback {
 
 		void addName(String name);
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/dropwizard/ReservoirFactory.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -26,6 +26,7 @@ import com.codahale.metrics.Reservoir;
  * @author Phillip Webb
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface ReservoirFactory {
 
 	/**

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/util/SimpleInMemoryRepository.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -102,6 +102,7 @@ public class SimpleInMemoryRepository<T> {
 	 *
 	 * @param <T> the value type
 	 */
+	@FunctionalInterface
 	public interface Callback<T> {
 
 		/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigurationImportFilter.java

@@ -39,6 +39,7 @@ import org.springframework.context.ResourceLoaderAware;
  * @author Phillip Webb
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface AutoConfigurationImportFilter {
 
 	/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/AutoConfigurationImportListener.java

@@ -41,6 +41,7 @@ import org.springframework.context.ResourceLoaderAware;
  * @author Phillip Webb
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface AutoConfigurationImportListener extends EventListener {
 
 	/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cassandra/ClusterBuilderCustomizer.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -27,6 +27,7 @@ import com.datastax.driver.core.Cluster.Builder;
  * @author Eddú Meléndez
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface ClusterBuilderCustomizer {
 
 	/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/elasticsearch/jest/HttpClientConfigBuilderCustomizer.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -27,6 +27,7 @@ import io.searchbox.client.config.HttpClientConfig.Builder;
  * @author Stephane Nicoll
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface HttpClientConfigBuilderCustomizer {
 
 	/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/IgnoredRequestCustomizer.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -25,6 +25,7 @@ import org.springframework.security.config.annotation.web.builders.WebSecurity.I
  * @author Madhura Bhave
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface IgnoredRequestCustomizer {
 
 	/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/UserInfoRestTemplateFactory.java

@@ -26,6 +26,7 @@ import org.springframework.security.oauth2.client.OAuth2RestTemplate;
  * @author Stephane Nicoll
  * @since 1.4.0
  */
+@FunctionalInterface
 public interface UserInfoRestTemplateFactory {
 
 	/**

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/transaction/PlatformTransactionManagerCustomizer.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -27,6 +27,7 @@ import org.springframework.transaction.PlatformTransactionManager;
  * @author Phillip Webb
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface PlatformTransactionManagerCustomizer<T extends PlatformTransactionManager> {
 
 	/**

spring-boot-test/src/main/java/org/springframework/boot/test/context/DefaultTestExecutionListenersPostProcessor.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -29,6 +29,7 @@ import org.springframework.test.context.TestExecutionListener;
  * @since 1.4.1
  * @see SpringBootTest
  */
+@FunctionalInterface
 public interface DefaultTestExecutionListenersPostProcessor {
 
 	/**

spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/fieldvalues/javac/TreeVisitor.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -22,7 +22,6 @@ package org.springframework.boot.configurationprocessor.fieldvalues.javac;
  * @author Phillip Webb
  * @since 1.2.0
  */
-@FunctionalInterface
 interface TreeVisitor {
 
 	void visitVariable(VariableTree variable) throws Exception;

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/CustomLoaderLayout.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -25,6 +25,7 @@ import java.io.IOException;
  * @author Phillip Webb
  * @since 1.5.0
  */
+@FunctionalInterface
 public interface CustomLoaderLayout {
 
 	/**

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/LayoutFactory.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -24,6 +24,7 @@ import java.io.File;
  * @author Dave Syer
  * @author Phillip Webb
  */
+@FunctionalInterface
 public interface LayoutFactory {
 
 	/**

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java

@@ -404,6 +404,7 @@ public class Repackager {
 	 * Callback interface used to present a warning when finding the main class takes too
 	 * long.
 	 */
+	@FunctionalInterface
 	public interface MainClassTimeoutWarningListener {
 
 		/**

spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarEntryFilter.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -21,7 +21,6 @@ package org.springframework.boot.loader.jar;
  *
  * @author Phillip Webb
  */
-@FunctionalInterface
 interface JarEntryFilter {
 
 	/**

spring-boot/src/main/java/org/springframework/boot/BeanDefinitionLoader.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -326,7 +326,7 @@ class BeanDefinitionLoader {
 	/**
 	 * Source for Bean definitions defined in Groovy.
 	 */
-	protected interface GroovyBeanDefinitionSource {
+	interface GroovyBeanDefinitionSource {
 
 		Closure<?> getBeans();
 

spring-boot/src/main/java/org/springframework/boot/bind/PropertyNamePatternsMatcher.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -22,7 +22,6 @@ package org.springframework.boot.bind;
  * @author Phillip Webb
  * @since 1.2.0
  */
-@FunctionalInterface
 interface PropertyNamePatternsMatcher {
 
 	PropertyNamePatternsMatcher ALL = new PropertyNamePatternsMatcher() {

spring-boot/src/main/java/org/springframework/boot/context/ConfigurationWarningsApplicationContextInitializer.java

@@ -114,6 +114,7 @@ public class ConfigurationWarningsApplicationContextInitializer
 	/**
 	 * A single check that can be applied.
 	 */
+	@FunctionalInterface
 	protected interface Check {
 
 		/**

spring-boot/src/main/java/org/springframework/boot/orm/jpa/EntityManagerFactoryBuilder.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -220,6 +220,7 @@ public class EntityManagerFactoryBuilder {
 	/**
 	 * A callback for new entity manager factory beans created by a Builder.
 	 */
+	@FunctionalInterface
 	public interface EntityManagerFactoryBeanCallback {
 
 		void execute(LocalContainerEntityManagerFactoryBean factory);