Preparations for eventual removal of ParameterizedRowMapper along with SimpleJdbcTemplate

Issue: SPR-11895

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -63,7 +63,7 @@ import org.springframework.util.StringUtils;
  * will have been set to the primitive's default value instead of null.
  *
  * <p>Please note that this class is designed to provide convenience rather than high performance.
- * For best performance consider using a custom RowMapper.
+ * For best performance, consider using a custom {@link RowMapper} implementation.
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -185,4 +185,17 @@ public class SingleColumnRowMapper<T> implements RowMapper<T> {
 		}
 	}
 
+
+	/**
+	 * Static factory method to create a new ParameterizedSingleColumnRowMapper
+	 * (with the required type specified only once).
+	 * @param requiredType the type that each result object is expected to match
+	 * @since 4.1
+	 */
+	public static <T> SingleColumnRowMapper<T> newInstance(Class<T> requiredType) {
+		SingleColumnRowMapper<T> newInstance = new SingleColumnRowMapper<T>();
+		newInstance.setRequiredType(requiredType);
+		return newInstance;
+	}
+
 }

spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/ParameterizedBeanPropertyRowMapper.java

@@ -43,13 +43,17 @@ import org.springframework.jdbc.core.BeanPropertyRowMapper;
  * try using column aliases in the SQL statement like "select fname as first_name from customer".
  *
  * <p>Please note that this class is designed to provide convenience rather than high performance.
- * For best performance consider using a custom RowMapper.
+ * For best performance, consider using a custom {@link org.springframework.jdbc.core.RowMapper}
+ * implementation.
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller
  * @since 2.5
  * @see ParameterizedRowMapper
+ * @deprecated along with {@link SimpleJdbcTemplate}, in favor of the regular
+ * {@link org.springframework.jdbc.core.BeanPropertyRowMapper}
  */
+@Deprecated
 public class ParameterizedBeanPropertyRowMapper<T> extends BeanPropertyRowMapper<T>
 		implements ParameterizedRowMapper<T> {
 

spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/ParameterizedRowMapper.java

@@ -27,7 +27,10 @@ import org.springframework.jdbc.core.RowMapper;
  * @author Juergen Hoeller
  * @since 2.0
  * @see org.springframework.jdbc.core.simple.SimpleJdbcOperations
+ * @deprecated along with {@link SimpleJdbcTemplate}, in favor of the regular
+ * {@link org.springframework.jdbc.core.SingleColumnRowMapper}
  */
+@Deprecated
 public interface ParameterizedRowMapper<T> extends RowMapper<T> {
 
 }

spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/ParameterizedSingleColumnRowMapper.java

@@ -32,7 +32,10 @@ import org.springframework.jdbc.core.SingleColumnRowMapper;
  *
  * @author Juergen Hoeller
  * @since 2.5.2
+ * @deprecated along with {@link SimpleJdbcTemplate}, in favor of the regular
+ * {@link org.springframework.jdbc.core.SingleColumnRowMapper}
  */
+@Deprecated
 public class ParameterizedSingleColumnRowMapper<T> extends SingleColumnRowMapper<T>
 		implements ParameterizedRowMapper<T> {
 
@@ -42,9 +45,9 @@ public class ParameterizedSingleColumnRowMapper<T> extends SingleColumnRowMapper
 	 * @param requiredType the type that each result object is expected to match
 	 */
 	public static <T> ParameterizedSingleColumnRowMapper<T> newInstance(Class<T> requiredType) {
-		ParameterizedSingleColumnRowMapper<T> rm = new ParameterizedSingleColumnRowMapper<T>();
-		rm.setRequiredType(requiredType);
-		return rm;
+		ParameterizedSingleColumnRowMapper<T> newInstance = new ParameterizedSingleColumnRowMapper<T>();
+		newInstance.setRequiredType(requiredType);
+		return newInstance;
 	}
 
 }