Polish

See gh-43498

CONTRIBUTING.adoc

@@ -43,7 +43,7 @@ None of these is essential for a pull request, but they will all help.  They can
 added after the original pull request but before a merge.
 
 * We use the https://github.com/spring-io/spring-javaformat/[Spring JavaFormat] project to apply code formatting conventions.
-  If you use Eclipse and you follow the https://github.com/spring-projects/spring-boot/wiki/Working-with-the-Code#importing-into-eclipse["Importing into eclipse"] instructions you should get project specific formatting automatically.
+  If you use Eclipse and you follow the https://github.com/spring-projects/spring-boot/wiki/Working-with-the-Code#importing-into-eclipse["Importing into Eclipse"] instructions you should get project-specific formatting automatically.
   You can also install the https://github.com/spring-io/spring-javaformat/#intellij-idea[Spring JavaFormat IntelliJ Plugin] or format the code from the Gradle build by running `./gradlew format`.
   Note that if you have format violations in `buildSrc`, you can fix them by running `./gradlew -p buildSrc format` from the project root directory.
 * The build includes Checkstyle rules for many of our code conventions. Run `./gradlew checkstyleMain checkstyleTest` if you want to check your changes are compliant.

buildSrc/src/main/java/org/springframework/boot/build/bom/CheckBom.java

@@ -216,7 +216,7 @@ public abstract class CheckBom extends DefaultTask {
 			.getResolvedConfiguration()
 			.getResolvedArtifacts();
 		if (artifacts.size() != 1) {
-			throw new IllegalStateException("Expected a single file but '%s' resolved to %d artifacts"
+			throw new IllegalStateException("Expected a single artifact but '%s' resolved to %d artifacts"
 				.formatted(coordinates, artifacts.size()));
 		}
 		return artifacts.iterator().next().getFile();

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/logging/OnEnabledLoggingExportCondition.java

@@ -42,12 +42,13 @@ class OnEnabledLoggingExportCondition extends SpringBootCondition {
 	public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
 		String loggingExporter = getExporterName(metadata);
 		if (StringUtils.hasLength(loggingExporter)) {
+			String formattedExporterProperty = EXPORTER_PROPERTY.formatted(loggingExporter);
 			Boolean exporterLoggingEnabled = context.getEnvironment()
-				.getProperty(EXPORTER_PROPERTY.formatted(loggingExporter), Boolean.class);
+				.getProperty(formattedExporterProperty, Boolean.class);
 			if (exporterLoggingEnabled != null) {
 				return new ConditionOutcome(exporterLoggingEnabled,
 						ConditionMessage.forCondition(ConditionalOnEnabledLoggingExport.class)
-							.because(EXPORTER_PROPERTY.formatted(loggingExporter) + " is " + exporterLoggingEnabled));
+							.because(formattedExporterProperty + " is " + exporterLoggingEnabled));
 			}
 		}
 		Boolean globalLoggingEnabled = context.getEnvironment().getProperty(GLOBAL_PROPERTY, Boolean.class);

spring-boot-project/spring-boot-autoconfigure/src/test/resources/batch/custom-schema.sql

@@ -1,21 +1,21 @@
 CREATE TABLE PREFIX_JOB_INSTANCE  (
-	JOB_INSTANCE_ID BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY ,
-	VERSION BIGINT ,
+	JOB_INSTANCE_ID BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+	VERSION BIGINT,
 	JOB_NAME VARCHAR(100) NOT NULL,
 	JOB_KEY VARCHAR(32) NOT NULL,
 	constraint JOB_INST_UN unique (JOB_NAME, JOB_KEY)
 ) ;
 
 CREATE TABLE PREFIX_JOB_EXECUTION  (
-	JOB_EXECUTION_ID BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY ,
-	VERSION BIGINT  ,
+	JOB_EXECUTION_ID BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+	VERSION BIGINT,
 	JOB_INSTANCE_ID BIGINT NOT NULL,
 	CREATE_TIME TIMESTAMP NOT NULL,
-	START_TIME TIMESTAMP DEFAULT NULL ,
-	END_TIME TIMESTAMP DEFAULT NULL ,
-	STATUS VARCHAR(10) ,
-	EXIT_CODE VARCHAR(2500) ,
-	EXIT_MESSAGE VARCHAR(2500) ,
+	START_TIME TIMESTAMP DEFAULT NULL,
+	END_TIME TIMESTAMP DEFAULT NULL,
+	STATUS VARCHAR(10),
+	EXIT_CODE VARCHAR(2500),
+	EXIT_MESSAGE VARCHAR(2500),
 	LAST_UPDATED TIMESTAMP,
 	JOB_CONFIGURATION_LOCATION VARCHAR(2500) NULL,
 	constraint JOB_INST_EXEC_FK foreign key (JOB_INSTANCE_ID)
@@ -23,36 +23,36 @@ CREATE TABLE PREFIX_JOB_EXECUTION  (
 ) ;
 
 CREATE TABLE PREFIX_JOB_EXECUTION_PARAMS  (
-	JOB_EXECUTION_ID BIGINT NOT NULL ,
-	TYPE_CD VARCHAR(6) NOT NULL ,
-	KEY_NAME VARCHAR(100) NOT NULL ,
-	STRING_VAL VARCHAR(250) ,
-	DATE_VAL TIMESTAMP DEFAULT NULL ,
-	LONG_VAL BIGINT ,
-	DOUBLE_VAL DOUBLE PRECISION ,
-	IDENTIFYING CHAR(1) NOT NULL ,
+	JOB_EXECUTION_ID BIGINT NOT NULL,
+	TYPE_CD VARCHAR(6) NOT NULL,
+	KEY_NAME VARCHAR(100) NOT NULL,
+	STRING_VAL VARCHAR(250),
+	DATE_VAL TIMESTAMP DEFAULT NULL,
+	LONG_VAL BIGINT,
+	DOUBLE_VAL DOUBLE PRECISION,
+	IDENTIFYING CHAR(1) NOT NULL,
 	constraint JOB_EXEC_PARAMS_FK foreign key (JOB_EXECUTION_ID)
 	references PREFIX_JOB_EXECUTION(JOB_EXECUTION_ID)
 ) ;
 
 CREATE TABLE PREFIX_STEP_EXECUTION  (
-	STEP_EXECUTION_ID BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY ,
+	STEP_EXECUTION_ID BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
 	VERSION BIGINT NOT NULL,
 	STEP_NAME VARCHAR(100) NOT NULL,
 	JOB_EXECUTION_ID BIGINT NOT NULL,
-	START_TIME TIMESTAMP NOT NULL ,
-	END_TIME TIMESTAMP DEFAULT NULL ,
-	STATUS VARCHAR(10) ,
-	COMMIT_COUNT BIGINT ,
-	READ_COUNT BIGINT ,
-	FILTER_COUNT BIGINT ,
-	WRITE_COUNT BIGINT ,
-	READ_SKIP_COUNT BIGINT ,
-	WRITE_SKIP_COUNT BIGINT ,
-	PROCESS_SKIP_COUNT BIGINT ,
-	ROLLBACK_COUNT BIGINT ,
-	EXIT_CODE VARCHAR(2500) ,
-	EXIT_MESSAGE VARCHAR(2500) ,
+	START_TIME TIMESTAMP NOT NULL,
+	END_TIME TIMESTAMP DEFAULT NULL,
+	STATUS VARCHAR(10),
+	COMMIT_COUNT BIGINT,
+	READ_COUNT BIGINT,
+	FILTER_COUNT BIGINT,
+	WRITE_COUNT BIGINT,
+	READ_SKIP_COUNT BIGINT,
+	WRITE_SKIP_COUNT BIGINT,
+	PROCESS_SKIP_COUNT BIGINT,
+	ROLLBACK_COUNT BIGINT,
+	EXIT_CODE VARCHAR(2500),
+	EXIT_MESSAGE VARCHAR(2500),
 	LAST_UPDATED TIMESTAMP,
 	constraint JOB_EXEC_STEP_FK foreign key (JOB_EXECUTION_ID)
 	references PREFIX_JOB_EXECUTION(JOB_EXECUTION_ID)
@@ -61,7 +61,7 @@ CREATE TABLE PREFIX_STEP_EXECUTION  (
 CREATE TABLE PREFIX_STEP_EXECUTION_CONTEXT  (
 	STEP_EXECUTION_ID BIGINT NOT NULL PRIMARY KEY,
 	SHORT_CONTEXT VARCHAR(2500) NOT NULL,
-	SERIALIZED_CONTEXT LONGVARCHAR ,
+	SERIALIZED_CONTEXT LONGVARCHAR,
 	constraint STEP_EXEC_CTX_FK foreign key (STEP_EXECUTION_ID)
 	references PREFIX_STEP_EXECUTION(STEP_EXECUTION_ID)
 ) ;
@@ -69,7 +69,7 @@ CREATE TABLE PREFIX_STEP_EXECUTION_CONTEXT  (
 CREATE TABLE PREFIX_JOB_EXECUTION_CONTEXT  (
 	JOB_EXECUTION_ID BIGINT NOT NULL PRIMARY KEY,
 	SHORT_CONTEXT VARCHAR(2500) NOT NULL,
-	SERIALIZED_CONTEXT LONGVARCHAR ,
+	SERIALIZED_CONTEXT LONGVARCHAR,
 	constraint JOB_EXEC_CTX_FK foreign key (JOB_EXECUTION_ID)
 	references PREFIX_JOB_EXECUTION(JOB_EXECUTION_ID)
 ) ;

spring-boot-project/spring-boot-docs/src/docs/antora/modules/reference/pages/io/rest-client.adoc

@@ -209,8 +209,8 @@ If multiple clients are available on the classpath, and not global configuration
 [[io.rest-client.clienthttprequestfactory.configuration]]
 === Global HTTP Client Configuration
 
-If the the auto-detected HTTP client does not meet your needs, you can use the configprop:spring.http.client.factory[] property to pick a specific factory.
-For example, if you have Apache HttpClient on your classpath, but you prefer Jetty's javadoc:org.eclipse.jetty.client.HttpClient[] you can add use the following:
+If the auto-detected HTTP client does not meet your needs, you can use the configprop:spring.http.client.factory[] property to pick a specific factory.
+For example, if you have Apache HttpClient on your classpath, but you prefer Jetty's javadoc:org.eclipse.jetty.client.HttpClient[] you can add the following:
 
 [configprops,yaml]
 ----

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/io/restclient/clienthttprequestfactory/configuration/MyClientHttpConfiguration.kt

@@ -10,7 +10,7 @@ import java.net.http.HttpClient
 class MyClientHttpConfiguration {
 
 	@Bean
-	fun clientHttpRequestFactoryBuilder(proxySelector: ProxySelector): ClientHttpRequestFactoryBuilder<*>? {
+	fun clientHttpRequestFactoryBuilder(proxySelector: ProxySelector): ClientHttpRequestFactoryBuilder<*> {
 		return ClientHttpRequestFactoryBuilder.jdk()
 				.withHttpClientCustomizer { builder -> builder.proxy(proxySelector) }
 	}

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/json/app/ExampleJsonComponent.java

@@ -59,7 +59,7 @@ public class ExampleJsonComponent {
 		protected ExampleCustomObject deserializeObject(JsonParser jsonParser, DeserializationContext context,
 				ObjectCodec codec, JsonNode tree) throws IOException {
 			String value = nullSafeValue(tree.get("value"), String.class);
-			Date date = nullSafeValue(tree.get("date"), Integer.class, Date::new);
+			Date date = nullSafeValue(tree.get("date"), Long.class, Date::new);
 			UUID uuid = nullSafeValue(tree.get("uuid"), String.class, UUID::fromString);
 			return new ExampleCustomObject(value, date, uuid);
 		}

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/json-shade/java/org/springframework/boot/configurationprocessor/json/JSONObject.java

@@ -786,7 +786,7 @@ public class JSONObject {
 	/**
 	 * Wraps the given object if necessary.
 	 * <p>
-	 * If the object is null or , returns {@link #NULL}. If the object is a
+	 * If the object is null or, returns {@link #NULL}. If the object is a
 	 * {@code JSONArray} or {@code JSONObject}, no wrapping is necessary. If the object is
 	 * {@code NULL}, no wrapping is necessary. If the object is an array or
 	 * {@code Collection}, returns an equivalent {@code JSONArray}. If the object is a

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/util/Instantiator.java

@@ -149,9 +149,9 @@ public class Instantiator<T> {
 	}
 
 	/**
-	 * Instantiate the given set of classes, injecting constructor arguments as necessary.
-	 * @param type the types to instantiate
-	 * @return a list of instantiated instances
+	 * Instantiate the given class, injecting constructor arguments as necessary.
+	 * @param type the type to instantiate
+	 * @return an instantiated instance
 	 * @since 3.4.0
 	 */
 	public T instantiateType(Class<?> type) {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/RestTemplateBuilder.java

@@ -438,7 +438,7 @@ public class RestTemplateBuilder {
 
 	/**
 	 * Sets the {@link ClientHttpRequestFactorySettings}. This will replace any previously
-	 * set {@link #connectTimeout(Duration) connectTimeout} ,{@link #readTimeout(Duration)
+	 * set {@link #connectTimeout(Duration) connectTimeout}, {@link #readTimeout(Duration)
 	 * readTimeout} and {@link #sslBundle(SslBundle) sslBundle} values.
 	 * @param requestFactorySettings the request factory settings
 	 * @return a new builder instance

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/context/ServerPortInfoApplicationContextInitializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -39,7 +39,7 @@ import org.springframework.util.StringUtils;
  * {@link Value @Value} or obtained through the {@link Environment}.
  * <p>
  * If the {@link WebServerInitializedEvent} has a
- * {@link WebServerApplicationContext#getServerNamespace() server namespace} , it will be
+ * {@link WebServerApplicationContext#getServerNamespace() server namespace}, it will be
  * used to construct the property name. For example, the "management" actuator context
  * will have the property name {@literal "local.management.port"}.
  * <p>

spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/intTest/java/org/springframework/boot/context/embedded/EmbeddedServerContainerInvocationContextProvider.java

@@ -116,8 +116,9 @@ class EmbeddedServerContainerInvocationContextProvider
 	private AbstractApplicationLauncher getAbstractApplicationLauncher(Application application,
 			Class<? extends AbstractApplicationLauncher> launcherClass) {
 		String cacheKey = application.getContainer() + ":" + application.getPackaging() + ":" + launcherClass.getName();
-		if (this.launcherCache.containsKey(cacheKey)) {
-			return this.launcherCache.get(cacheKey);
+		AbstractApplicationLauncher cachedLauncher = this.launcherCache.get(cacheKey);
+		if (cachedLauncher != null) {
+			return cachedLauncher;
 		}
 		AbstractApplicationLauncher launcher = ReflectionUtils.newInstance(launcherClass, application,
 				new File(buildOutput.getRootLocation(), "app-launcher-" + UUID.randomUUID()));