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Proper resolution of Optional.empty() for header arguments 

Issue: SPR-15151
This commit is contained in:
Juergen Hoeller 2017-01-17 10:46:37 +01:00
parent 46fc7fba8f
commit e9db4d6f96
2 changed files with 36 additions and 4 deletions
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5
spring-messaging/src/main/java/org/springframework/messaging/handler/annotation/support/AbstractNamedValueMethodArgumentResolver.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2016 the original author or authors.
* Copyright 2002-2017 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.
@ -53,6 +53,7 @@ import org.springframework.util.ClassUtils;
* argument value if it doesn't match the method parameter type.
*
* @author Rossen Stoyanchev
* @author Juergen Hoeller
* @since 4.0
*/
public abstract class AbstractNamedValueMethodArgumentResolver implements HandlerMethodArgumentResolver {
@ -106,7 +107,7 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
arg = resolveStringValue(namedValueInfo.defaultValue);
}
if (!ClassUtils.isAssignableValue(parameter.getParameterType(), arg)) {
if (parameter != nestedParameter || !ClassUtils.isAssignableValue(parameter.getParameterType(), arg)) {
arg = this.conversionService.convert(arg, TypeDescriptor.forObject(arg), new TypeDescriptor(parameter));
}

35
spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/HeaderMethodArgumentResolverTests.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2016 the original author or authors.
* Copyright 2002-2017 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 @@ package org.springframework.messaging.handler.annotation.support;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import org.junit.Before;
import org.junit.Test;
@ -42,6 +43,7 @@ import static org.junit.Assert.*;
* Test fixture for {@link HeaderMethodArgumentResolver} tests.
*
* @author Rossen Stoyanchev
* @author Juergen Hoeller
* @since 4.0
*/
public class HeaderMethodArgumentResolverTests {
@ -53,6 +55,7 @@ public class HeaderMethodArgumentResolverTests {
private MethodParameter paramSystemPropertyDefaultValue;
private MethodParameter paramSystemPropertyName;
private MethodParameter paramNotAnnotated;
private MethodParameter paramOptional;
private MethodParameter paramNativeHeader;
@ -69,7 +72,8 @@ public class HeaderMethodArgumentResolverTests {
this.paramSystemPropertyDefaultValue = new SynthesizingMethodParameter(method, 2);
this.paramSystemPropertyName = new SynthesizingMethodParameter(method, 3);
this.paramNotAnnotated = new SynthesizingMethodParameter(method, 4);
this.paramNativeHeader = new SynthesizingMethodParameter(method, 5);
this.paramOptional = new SynthesizingMethodParameter(method, 5);
this.paramNativeHeader = new SynthesizingMethodParameter(method, 6);
this.paramRequired.initParameterNameDiscovery(new DefaultParameterNameDiscoverer());
GenericTypeResolver.resolveParameterType(this.paramRequired, HeaderMethodArgumentResolver.class);
@ -147,6 +151,32 @@ public class HeaderMethodArgumentResolverTests {
}
}
@Test
public void resolveOptionalHeaderWithValue() throws Exception {
GenericApplicationContext cxt = new GenericApplicationContext();
cxt.refresh();
HeaderMethodArgumentResolver resolver =
new HeaderMethodArgumentResolver(new DefaultConversionService(), cxt.getBeanFactory());
Message<String> message = MessageBuilder.withPayload("foo").setHeader("foo", "bar").build();
Object result = resolver.resolveArgument(paramOptional, message);
assertEquals(Optional.of("bar"), result);
}
@Test
public void resolveOptionalHeaderAsEmpty() throws Exception {
GenericApplicationContext cxt = new GenericApplicationContext();
cxt.refresh();
HeaderMethodArgumentResolver resolver =
new HeaderMethodArgumentResolver(new DefaultConversionService(), cxt.getBeanFactory());
Message<String> message = MessageBuilder.withPayload("foo").build();
Object result = resolver.resolveArgument(paramOptional, message);
assertEquals(Optional.empty(), result);
}
public void handleMessage(
@Header String param1,
@ -154,6 +184,7 @@ public class HeaderMethodArgumentResolverTests {
@Header(name = "name", defaultValue = "#{systemProperties.systemProperty}") String param3,
@Header(name = "#{systemProperties.systemProperty}") String param4,
String param5,
@Header("foo") Optional<String> param6,
@Header("nativeHeaders.param1") String nativeHeaderParam1) {
}