Add nullability annotations to module/spring-boot-batch

See gh-46587

Author: mhalbritter

module/spring-boot-batch/src/main/java/org/springframework/boot/batch/autoconfigure/BatchAutoConfiguration.java

@@ -20,6 +20,8 @@
 
 import javax.sql.DataSource;
 
+import org.jspecify.annotations.Nullable;
+
 import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
 import org.springframework.batch.core.configuration.support.DefaultBatchConfiguration;
 import org.springframework.batch.core.configuration.support.JdbcDefaultBatchConfiguration;
@@ -103,15 +105,15 @@ static class SpringBootBatchConfiguration extends JdbcDefaultBatchConfiguration
 
 		private final PlatformTransactionManager transactionManager;
 
-		private final TaskExecutor taskExecutor;
+		private final @Nullable TaskExecutor taskExecutor;
 
 		private final BatchProperties properties;
 
 		private final List<BatchConversionServiceCustomizer> batchConversionServiceCustomizers;
 
-		private final ExecutionContextSerializer executionContextSerializer;
+		private final @Nullable ExecutionContextSerializer executionContextSerializer;
 
-		private final JobParametersConverter jobParametersConverter;
+		private final @Nullable JobParametersConverter jobParametersConverter;
 
 		SpringBootBatchConfiguration(DataSource dataSource, @BatchDataSource ObjectProvider<DataSource> batchDataSource,
 				PlatformTransactionManager transactionManager,

module/spring-boot-batch/src/main/java/org/springframework/boot/batch/autoconfigure/BatchProperties.java

@@ -16,6 +16,8 @@
 
 package org.springframework.boot.batch.autoconfigure;
 
+import org.jspecify.annotations.Nullable;
+
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.sql.init.DatabaseInitializationMode;
 import org.springframework.transaction.annotation.Isolation;
@@ -76,7 +78,7 @@ public static class Jdbc {
 		/**
 		 * Transaction isolation level to use when creating job meta-data for new jobs.
 		 */
-		private Isolation isolationLevelForCreate;
+		private @Nullable Isolation isolationLevelForCreate;
 
 		/**
 		 * Path to the SQL file to use to initialize the database schema.
@@ -87,12 +89,12 @@ public static class Jdbc {
 		 * Platform to use in initialization scripts if the @@platform@@ placeholder is
 		 * used. Auto-detected by default.
 		 */
-		private String platform;
+		private @Nullable String platform;
 
 		/**
 		 * Table prefix for all the batch meta-data tables.
 		 */
-		private String tablePrefix;
+		private @Nullable String tablePrefix;
 
 		/**
 		 * Database schema initialization mode.
@@ -107,11 +109,11 @@ public void setValidateTransactionState(boolean validateTransactionState) {
 			this.validateTransactionState = validateTransactionState;
 		}
 
-		public Isolation getIsolationLevelForCreate() {
+		public @Nullable Isolation getIsolationLevelForCreate() {
 			return this.isolationLevelForCreate;
 		}
 
-		public void setIsolationLevelForCreate(Isolation isolationLevelForCreate) {
+		public void setIsolationLevelForCreate(@Nullable Isolation isolationLevelForCreate) {
 			this.isolationLevelForCreate = isolationLevelForCreate;
 		}
 
@@ -123,19 +125,19 @@ public void setSchema(String schema) {
 			this.schema = schema;
 		}
 
-		public String getPlatform() {
+		public @Nullable String getPlatform() {
 			return this.platform;
 		}
 
-		public void setPlatform(String platform) {
+		public void setPlatform(@Nullable String platform) {
 			this.platform = platform;
 		}
 
-		public String getTablePrefix() {
+		public @Nullable String getTablePrefix() {
 			return this.tablePrefix;
 		}
 
-		public void setTablePrefix(String tablePrefix) {
+		public void setTablePrefix(@Nullable String tablePrefix) {
 			this.tablePrefix = tablePrefix;
 		}
 

module/spring-boot-batch/src/main/java/org/springframework/boot/batch/autoconfigure/JobLauncherApplicationRunner.java

@@ -23,6 +23,7 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.jspecify.annotations.Nullable;
 
 import org.springframework.batch.core.configuration.JobRegistry;
 import org.springframework.batch.core.converter.DefaultJobParametersConverter;
@@ -74,14 +75,15 @@ public class JobLauncherApplicationRunner
 
 	private final JobOperator jobOperator;
 
-	private JobRegistry jobRegistry;
+	private @Nullable JobRegistry jobRegistry;
 
-	private String jobName;
+	private @Nullable String jobName;
 
 	private Collection<Job> jobs = Collections.emptySet();
 
 	private int order = DEFAULT_ORDER;
 
+	@SuppressWarnings("NullAway.Init")
 	private ApplicationEventPublisher publisher;
 
 	/**
@@ -147,7 +149,7 @@ public void run(String... args) throws JobExecutionException {
 		launchJobFromProperties(StringUtils.splitArrayElementsIntoProperties(args, "="));
 	}
 
-	protected void launchJobFromProperties(Properties properties) throws JobExecutionException {
+	protected void launchJobFromProperties(@Nullable Properties properties) throws JobExecutionException {
 		JobParameters jobParameters = this.converter.getJobParameters(properties);
 		executeLocalJobs(jobParameters);
 		executeRegisteredJobs(jobParameters);

module/spring-boot-batch/src/main/java/org/springframework/boot/batch/autoconfigure/observation/package-info.java

@@ -17,4 +17,7 @@
 /**
  * Auto-configuration for Spring Batch observations.
  */
+@NullMarked
 package org.springframework.boot.batch.autoconfigure.observation;
+
+import org.jspecify.annotations.NullMarked;

module/spring-boot-batch/src/main/java/org/springframework/boot/batch/autoconfigure/package-info.java

@@ -17,4 +17,7 @@
 /**
  * Auto-configuration for Spring Batch.
  */
+@NullMarked
 package org.springframework.boot.batch.autoconfigure;
+
+import org.jspecify.annotations.NullMarked;