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Consider Void.class a primitive wrapper in ClassUtils

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Prior to this commit, ClassUtils.isPrimitiveOrWrapper() and
ClassUtils.isPrimitiveWrapper() did not return true for Void.class.
However, ClassUtils.isPrimitiveOrWrapper() did return true for
void.class. This lacking symmetry is inconsistent and can lead to bugs
in reflective code.

See: https://github.com/spring-projects/spring-data-r2dbc/issues/159

This commit addresses this by adding an entry for Void.class -> void.class
in the internal primitiveWrapperTypeMap in ClassUtils.

Closes gh-23572
This commit is contained in:
Sam Brannen
2019-09-03 13:55:56 +02:00
parent f748b1e68d
commit f37ec90f2f
4 changed files with 56 additions and 8 deletions
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43
spring-core/src/test/java/org/springframework/util/ClassUtilsTests.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 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.
@@ -40,14 +40,17 @@ import org.springframework.tests.sample.objects.TestObject;
import static org.junit.Assert.*;
/**
* Unit tests for {@link ClassUtils}.
*
* @author Colin Sampaleanu
* @author Juergen Hoeller
* @author Rob Harrop
* @author Rick Evans
* @author Sam Brannen
*/
public class ClassUtilsTests {
private ClassLoader classLoader = getClass().getClassLoader();
private final ClassLoader classLoader = getClass().getClassLoader();
@Before
@@ -384,6 +387,42 @@ public class ClassUtilsTests {
assertNull(ClassUtils.determineCommonAncestor(String.class, List.class));
}
@Test
public void isPrimitiveWrapper() {
assertTrue(ClassUtils.isPrimitiveWrapper(Boolean.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Character.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Byte.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Short.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Integer.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Long.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Float.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Double.class));
assertTrue(ClassUtils.isPrimitiveWrapper(Void.class));
}
@Test
public void isPrimitiveOrWrapper() {
assertTrue(ClassUtils.isPrimitiveOrWrapper(boolean.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(char.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(byte.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(short.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(int.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(long.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(float.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(double.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(void.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Boolean.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Character.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Byte.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Short.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Integer.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Long.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Float.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Double.class));
assertTrue(ClassUtils.isPrimitiveOrWrapper(Void.class));
}
public static class InnerClass {