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Polish contribution

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See gh-25200
This commit is contained in:
Sam Brannen
2021-05-08 19:37:21 +02:00
parent 53b8d73078
commit bcd8896689
2 changed files with 15 additions and 12 deletions
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16
spring-web/src/main/java/org/springframework/web/method/annotation/ModelAttributeMethodProcessor.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 the original author or authors.
* Copyright 2002-2021 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.
@@ -40,6 +40,7 @@ import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Errors;
@@ -277,6 +278,14 @@ public class ModelAttributeMethodProcessor implements HandlerMethodArgumentResol
String paramName = paramNames[i];
Class<?> paramType = paramTypes[i];
Object value = webRequest.getParameterValues(paramName);
// Since WebRequest#getParameter exposes a single-value parameter as an array
// with a single element, we unwrap the single value in such cases, analogous
// to WebExchangeDataBinder.addBindValue(Map<String, Object>, String, List<?>).
if (ObjectUtils.isArray(value) && Array.getLength(value) == 1) {
value = Array.get(value, 0);
}
if (value == null) {
if (fieldDefaultPrefix != null) {
value = webRequest.getParameter(fieldDefaultPrefix + paramName);
@@ -288,11 +297,6 @@ public class ModelAttributeMethodProcessor implements HandlerMethodArgumentResol
}
}
// Singular web parameters are wrapped with array, extract it so it can be picked up by conversion service later on
if (value != null && value.getClass().isArray() && Array.getLength(value) == 1) {
value = Array.get(value, 0);
}
try {
MethodParameter methodParam = new FieldAwareConstructorParameter(ctor, i, paramName);
if (value == null && methodParam.isOptional()) {

11
spring-web/src/test/java/org/springframework/web/method/annotation/ModelAttributeMethodProcessorTests.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2020 the original author or authors.
* Copyright 2002-2021 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.
@@ -19,7 +19,6 @@ package org.springframework.web.method.annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import org.junit.jupiter.api.BeforeEach;
@@ -271,7 +270,7 @@ public class ModelAttributeMethodProcessorTests {
}
@Test // gh-25182
public void testResolveConstructorListParameter() throws Exception {
public void resolveConstructorListArgumentFromCommaSeparatedRequestParameter() throws Exception {
MockHttpServletRequest mockRequest = new MockHttpServletRequest();
mockRequest.addParameter("listOfStrings", "1,2");
ServletWebRequest requestWithParam = new ServletWebRequest(mockRequest);
@@ -281,14 +280,14 @@ public class ModelAttributeMethodProcessorTests {
.willAnswer(invocation -> {
WebRequestDataBinder binder = new WebRequestDataBinder(invocation.getArgument(1));
// Add conversion service which will convert "1,2" to List of size 2
// Add conversion service which will convert "1,2" to a list
binder.setConversionService(new DefaultFormattingConversionService());
return binder;
});
Object resolved = this.processor.resolveArgument(this.beanWithConstructorArgs, this.container, requestWithParam, factory);
assertThat(resolved).isNotNull();
assertThat(((TestBeanWithConstructorArgs) resolved).listOfStrings).isEqualTo(Arrays.asList("1", "2"));
assertThat(resolved).isInstanceOf(TestBeanWithConstructorArgs.class);
assertThat(((TestBeanWithConstructorArgs) resolved).listOfStrings).containsExactly("1", "2");
}
private void testGetAttributeFromModel(String expectedAttrName, MethodParameter param) throws Exception {