Refined SqlParameterSource batchUpdate tests (plus related polishing)

See gh-26071

spring-jdbc/src/main/java/org/springframework/jdbc/core/PreparedStatementCreatorFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -31,7 +31,6 @@ import java.util.Set;
 
 import org.springframework.dao.InvalidDataAccessApiUsageException;
 import org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor;
-import org.springframework.util.Assert;
 
 /**
  * Helper class that efficiently creates multiple {@link PreparedStatementCreator}
@@ -201,10 +200,9 @@ public class PreparedStatementCreatorFactory {
 
 		public PreparedStatementCreatorImpl(String actualSql, List<?> parameters) {
 			this.actualSql = actualSql;
-			Assert.notNull(parameters, "Parameters List must not be null");
 			this.parameters = parameters;
-			if (this.parameters.size() != declaredParameters.size()) {
-				// account for named parameters being used multiple times
+			if (parameters.size() != declaredParameters.size()) {
+				// Account for named parameters being used multiple times
 				Set<String> names = new HashSet<String>();
 				for (int i = 0; i < parameters.size(); i++) {
 					Object param = parameters.get(i);
@@ -278,7 +276,7 @@ public class PreparedStatementCreatorFactory {
 					Collection<?> entries = (Collection<?>) in;
 					for (Object entry : entries) {
 						if (entry instanceof Object[]) {
-							Object[] valueArray = ((Object[])entry);
+							Object[] valueArray = ((Object[]) entry);
 							for (Object argValue : valueArray) {
 								StatementCreatorUtils.setParameterValue(psToUse, sqlColIndx++, declaredParameter, argValue);
 							}

spring-jdbc/src/main/java/org/springframework/jdbc/core/namedparam/SqlParameterSourceUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 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 org.springframework.jdbc.core.SqlParameterValue;
  * in particular with {@link NamedParameterJdbcTemplate}.
  *
  * @author Thomas Risberg
+ * @author Juergen Hoeller
  * @since 2.5
  */
 public class SqlParameterSourceUtils {
@@ -67,16 +68,12 @@ public class SqlParameterSourceUtils {
 	 * @param source the source of parameter values and type information
 	 * @param parameterName the name of the parameter
 	 * @return the value object
+	 * @see SqlParameterValue
 	 */
 	public static Object getTypedValue(SqlParameterSource source, String parameterName) {
 		int sqlType = source.getSqlType(parameterName);
 		if (sqlType != SqlParameterSource.TYPE_UNKNOWN) {
-			if (source.getTypeName(parameterName) != null) {
-				return new SqlParameterValue(sqlType, source.getTypeName(parameterName), source.getValue(parameterName));
-			}
-			else {
-				return new SqlParameterValue(sqlType, source.getValue(parameterName));
-			}
+			return new SqlParameterValue(sqlType, source.getTypeName(parameterName), source.getValue(parameterName));
 		}
 		else {
 			return source.getValue(parameterName);

spring-jdbc/src/test/java/org/springframework/jdbc/core/namedparam/NamedParameterJdbcTemplateTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -431,10 +431,11 @@ public class NamedParameterJdbcTemplateTests {
 
 	@Test
 	public void testBatchUpdateWithSqlParameterSourcePlusTypeInfo() throws Exception {
-		SqlParameterSource[] ids = new SqlParameterSource[2];
-		ids[0] = new MapSqlParameterSource().addValue("id", 100, Types.NUMERIC);
-		ids[1] = new MapSqlParameterSource().addValue("id", 200, Types.NUMERIC);
-		final int[] rowsAffected = new int[] {1, 2};
+		SqlParameterSource[] ids = new SqlParameterSource[3];
+		ids[0] = new MapSqlParameterSource().addValue("id", null, Types.NULL);
+		ids[1] = new MapSqlParameterSource().addValue("id", 100, Types.NUMERIC);
+		ids[2] = new MapSqlParameterSource().addValue("id", 200, Types.NUMERIC);
+		final int[] rowsAffected = new int[] {1, 2, 3};
 
 		given(preparedStatement.executeBatch()).willReturn(rowsAffected);
 		given(connection.getMetaData()).willReturn(databaseMetaData);
@@ -442,13 +443,15 @@ public class NamedParameterJdbcTemplateTests {
 
 		int[] actualRowsAffected = namedParameterTemplate.batchUpdate(
 				"UPDATE NOSUCHTABLE SET DATE_DISPATCHED = SYSDATE WHERE ID = :id", ids);
-		assertTrue("executed 2 updates", actualRowsAffected.length == 2);
+		assertTrue("executed 3 updates", actualRowsAffected.length == 3);
 		assertEquals(rowsAffected[0], actualRowsAffected[0]);
 		assertEquals(rowsAffected[1], actualRowsAffected[1]);
+		assertEquals(rowsAffected[2], actualRowsAffected[2]);
 		verify(connection).prepareStatement("UPDATE NOSUCHTABLE SET DATE_DISPATCHED = SYSDATE WHERE ID = ?");
+		verify(preparedStatement).setNull(1, Types.NULL);
 		verify(preparedStatement).setObject(1, 100, Types.NUMERIC);
 		verify(preparedStatement).setObject(1, 200, Types.NUMERIC);
-		verify(preparedStatement, times(2)).addBatch();
+		verify(preparedStatement, times(3)).addBatch();
 		verify(preparedStatement, atLeastOnce()).close();
 		verify(connection, atLeastOnce()).close();
 	}