toString for AbstractSqlParameterSource

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

@@ -18,7 +18,9 @@
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.StringJoiner;
 
+import org.springframework.jdbc.core.SqlParameterValue;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
@@ -27,6 +29,7 @@
  * Provides registration of SQL types per parameter.
  *
  * @author Juergen Hoeller
+ * @author Jens Schauder
  * @since 2.0
  */
 public abstract class AbstractSqlParameterSource implements SqlParameterSource {
@@ -81,4 +84,21 @@ public String getTypeName(String paramName) {
 		return this.typeNames.get(paramName);
 	}
 
+	@Override
+	public String toString() {
+		String prefix = this.getClass().getSimpleName() + "[";
+		StringJoiner stringJoiner = new StringJoiner(", ", prefix, "]");
+		String[] parameterNames = this.getParameterNames();
+		if (parameterNames != null) {
+			for (String name : parameterNames) {
+				String typeName = this.getTypeName(name);
+				Object value = this.getValue(name);
+				if (value instanceof SqlParameterValue) {
+					value = ((SqlParameterValue) value).getValue();
+				}
+				stringJoiner.add(name + "=" + value + " (sqlType: " + (typeName == null ? this.getSqlType(name) : typeName) + ")");
+			}
+		}
+		return stringJoiner.toString();
+	}
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -19,6 +19,7 @@
 import java.sql.Types;
 import java.util.Arrays;
 
+import org.hamcrest.Matchers;
 import org.junit.Test;
 
 import org.springframework.tests.sample.beans.TestBean;
@@ -29,6 +30,7 @@
  * @author Rick Evans
  * @author Juergen Hoeller
  * @author Arjen Poutsma
+ * @author Jens Schauder
  */
 public class BeanPropertySqlParameterSourceTests {
 
@@ -82,6 +84,15 @@ public void hasValueWhereTheUnderlyingBeanPropertyIsNotReadable() throws Excepti
 		assertFalse(source.hasValue("noOp"));
 	}
 
+	@Test
+	public void toStringShowsParameterDetails() {
+		BeanPropertySqlParameterSource source = new BeanPropertySqlParameterSource(new TestBean("tb", 99));
+		assertThat(source.toString(), Matchers.allOf(
+				Matchers.containsString("BeanPropertySqlParameterSource"),
+				Matchers.containsString("name=tb (sqlType: 12)"),
+				Matchers.containsString("age=99 (sqlType: 4)"))
+		);
+	}
 
 	@SuppressWarnings("unused")
 	private static final class NoReadableProperties {

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

@@ -16,15 +16,18 @@
 
 package org.springframework.jdbc.core.namedparam;
 
+import org.hamcrest.Matchers;
 import org.junit.Test;
 
 import org.springframework.jdbc.core.SqlParameterValue;
+import org.springframework.tests.sample.beans.TestBean;
 
 import static org.junit.Assert.*;
 
 /**
  * @author Rick Evans
  * @author Arjen Poutsma
+ * @author Jens Schauder
  */
 public class MapSqlParameterSourceTests {
 
@@ -48,4 +51,12 @@ public void sqlParameterValueRegistersSqlType() throws Exception {
 		assertEquals("Correct SQL Type not registered", 2, msps2.getSqlType("FOO"));
 	}
 
+	@Test
+	public void toStringShowsParameterDetails() {
+		MapSqlParameterSource source = new MapSqlParameterSource("FOO", new SqlParameterValue(2, "Foo"));
+		assertThat(source.toString(), Matchers.allOf(
+				Matchers.containsString("MapSqlParameterSource"),
+				Matchers.containsString("FOO=Foo (sqlType: 2)"))
+		);
+	}
 }