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@@ -23,7 +23,7 @@ Spring Boot Support for [Doma](https://github.com/domaframework/doma)
 <dependency>
     <groupId>org.seasar.doma</groupId>
     <artifactId>doma-processor</artifactId>
-    <version>3.6.0</version>
+    <version>3.8.0</version>
     <optional>true</optional>
 </dependency>
 ```

doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaAutoConfiguration.java

@@ -85,7 +85,7 @@ public Dialect dialect(ObjectProvider<JdbcConnectionDetails> connectionDetailsPr
 		JdbcConnectionDetails connectionDetails = connectionDetailsProvider.getIfAvailable();
 		if (connectionDetails == null) {
 			throw new BeanCreationException(
-					"No connection details available. You will probably have to set 'doma.dialect' explicitly.");
+					"No JdbcConnectionDetails available. Either configure a DataSource or explicitly set 'doma.dialect' property in your configuration.");
 		}
 		DatabaseDriver databaseDriver = DatabaseDriver.fromJdbcUrl(connectionDetails.getJdbcUrl());
 		switch (databaseDriver) {

doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaConfig.java

@@ -7,9 +7,15 @@
 import org.seasar.doma.jdbc.statistic.StatisticManager;
 
 /**
- * {@link Config} implementation used in doma-spring-boot.
+ * Implementation of {@link Config} used by the Doma Spring Boot integration.
+ * <p>
+ * This class encapsulates all configuration properties required by Doma,
+ * such as {@link DataSource}, {@link Dialect}, and {@link JdbcLogger}.
+ * <p>
+ * The configuration is built using a builder pattern through {@link DomaConfigBuilder}.
  *
  * @author Toshiaki Maki
+ * @see DomaConfigBuilder
  */
 public class DomaConfig implements Config {
 

doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaConfigBuilder.java

@@ -62,8 +62,10 @@ public DataSource dataSource() {
 	 *
 	 * @param dataSource dataSource to use
 	 * @return chained builder
+	 * @throws NullPointerException if dataSource is null
 	 */
 	public DomaConfigBuilder dataSource(DataSource dataSource) {
+		Objects.requireNonNull(dataSource, "dataSource must not be null");
 		this.dataSource = new TransactionAwareDataSourceProxy(dataSource);
 		return this;
 	}
@@ -72,7 +74,15 @@ public Dialect dialect() {
 		return dialect;
 	}
 
+	/**
+	 * Set the Dialect.
+	 *
+	 * @param dialect the Dialect
+	 * @return this instance
+	 * @throws NullPointerException if dialect is null
+	 */
 	public DomaConfigBuilder dialect(Dialect dialect) {
+		Objects.requireNonNull(dialect, "dialect must not be null");
 		this.dialect = dialect;
 		return this;
 	}
@@ -81,7 +91,15 @@ public JdbcLogger jdbcLogger() {
 		return jdbcLogger;
 	}
 
+	/**
+	 * Set the JdbcLogger.
+	 *
+	 * @param jdbcLogger the JdbcLogger
+	 * @return this instance
+	 * @throws NullPointerException if jdbcLogger is null
+	 */
 	public DomaConfigBuilder jdbcLogger(JdbcLogger jdbcLogger) {
+		Objects.requireNonNull(jdbcLogger, "jdbcLogger must not be null");
 		this.jdbcLogger = jdbcLogger;
 		return this;
 	}
@@ -90,7 +108,15 @@ public SqlFileRepository sqlFileRepository() {
 		return sqlFileRepository;
 	}
 
+	/**
+	 * Set the SqlFileRepository.
+	 *
+	 * @param sqlFileRepository the SqlFileRepository
+	 * @return this instance
+	 * @throws NullPointerException if sqlFileRepository is null
+	 */
 	public DomaConfigBuilder sqlFileRepository(SqlFileRepository sqlFileRepository) {
+		Objects.requireNonNull(sqlFileRepository, "sqlFileRepository must not be null");
 		this.sqlFileRepository = sqlFileRepository;
 		return this;
 	}
@@ -146,7 +172,15 @@ public Naming naming() {
 		return naming;
 	}
 
+	/**
+	 * Set the Naming convention.
+	 *
+	 * @param naming the Naming convention
+	 * @return this instance
+	 * @throws NullPointerException if naming is null
+	 */
 	public DomaConfigBuilder naming(Naming naming) {
+		Objects.requireNonNull(naming, "naming must not be null");
 		this.naming = naming;
 		return this;
 	}
@@ -173,8 +207,16 @@ public EntityListenerProvider entityListenerProvider() {
 		return entityListenerProvider;
 	}
 
+	/**
+	 * Set the EntityListenerProvider.
+	 *
+	 * @param entityListenerProvider the EntityListenerProvider
+	 * @return this instance
+	 * @throws NullPointerException if entityListenerProvider is null
+	 */
 	public DomaConfigBuilder entityListenerProvider(
 			EntityListenerProvider entityListenerProvider) {
+		Objects.requireNonNull(entityListenerProvider, "entityListenerProvider must not be null");
 		this.entityListenerProvider = entityListenerProvider;
 		return this;
 	}

doma-spring-boot-autoconfigure/src/test/java/org/seasar/doma/boot/autoconfigure/DomaAutoConfigurationTest.java

@@ -318,7 +318,7 @@ public void testDialectMissingJdbConnectionDetails() {
 		BeanCreationException exception = assertThrows(BeanCreationException.class,
 				() -> this.context.refresh());
 		assertThat(exception.getMessage(), containsString(
-				"No connection details available. You will probably have to set 'doma.dialect' explicitly."));
+				"No JdbcConnectionDetails available. Either configure a DataSource or explicitly set 'doma.dialect' property in your configuration."));
 	}
 
 	@Test

doma-spring-boot-core/src/main/java/org/seasar/doma/boot/DomaSpringBootSqlBuilderSettings.java

@@ -4,21 +4,16 @@
 
 import org.seasar.doma.jdbc.SqlBuilderSettings;
 
-public class DomaSpringBootSqlBuilderSettings implements SqlBuilderSettings {
-
-	private final Predicate<String> shouldRemoveBlockComment;
-	private final Predicate<String> shouldRemoveLineComment;
-	private final boolean shouldRemoveBlankLines;
-	private final boolean shouldRequireInListPadding;
-
-	public DomaSpringBootSqlBuilderSettings(Predicate<String> shouldRemoveBlockComment,
-			Predicate<String> shouldRemoveLineComment, boolean shouldRemoveBlankLines,
-			boolean shouldRequireInListPadding) {
-		this.shouldRemoveBlockComment = shouldRemoveBlockComment;
-		this.shouldRemoveLineComment = shouldRemoveLineComment;
-		this.shouldRemoveBlankLines = shouldRemoveBlankLines;
-		this.shouldRequireInListPadding = shouldRequireInListPadding;
-	}
+/**
+ * Implementation of {@link SqlBuilderSettings} for Spring Boot.
+ * <p>
+ * This record encapsulates the SQL builder settings used by Doma in a Spring Boot application.
+ */
+public record DomaSpringBootSqlBuilderSettings(
+		Predicate<String> shouldRemoveBlockComment,
+		Predicate<String> shouldRemoveLineComment,
+		boolean shouldRemoveBlankLines,
+		boolean shouldRequireInListPadding) implements SqlBuilderSettings {
 
 	@Override
 	public boolean shouldRemoveBlockComment(String comment) {