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Fix code generation for null indexed argument value

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This commit fixes code generation when an indexed constructor argument
value is null as the method is overloaded and need the value to be
cast to `Object`.

Closes gh-31508
This commit is contained in:
Stéphane Nicoll
2023-10-28 10:52:15 +02:00
parent d3fba6d49b
commit 1762bf4a60
2 changed files with 32 additions and 2 deletions
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18
spring-beans/src/main/java/org/springframework/beans/factory/aot/BeanDefinitionPropertiesCodeGenerator.java
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@@ -174,7 +174,9 @@ class BeanDefinitionPropertiesCodeGenerator {
Map<Integer, ValueHolder> indexedValues = constructorValues.getIndexedArgumentValues();
if (!indexedValues.isEmpty()) {
indexedValues.forEach((index, valueHolder) -> {
CodeBlock valueCode = generateValue(valueHolder.getName(), valueHolder.getValue());
Object value = valueHolder.getValue();
CodeBlock valueCode = castIfNecessary(value == null, Object.class,
generateValue(valueHolder.getName(), value));
code.addStatement(
"$L.getConstructorArgumentValues().addIndexedArgumentValue($L, $L)",
BEAN_DEFINITION_VARIABLE, index, valueCode);
@@ -346,6 +348,20 @@ class BeanDefinitionPropertiesCodeGenerator {
}
}
/**
* Cast the specified {@code valueCode} to the specified {@code castType} if
* the {@code castNecessary} is {@code true}. Otherwise return the valueCode
* as is.
* @param castNecessary whether a cast is necessary
* @param castType the type to cast to
* @param valueCode the code for the value
* @return the existing value or a form of {@code (CastType) valueCode} if a
* cast is necessary
*/
private CodeBlock castIfNecessary(boolean castNecessary, Class<?> castType, CodeBlock valueCode) {
return (castNecessary ? CodeBlock.of("($T) $L", castType, valueCode) : valueCode);
}
static class PropertyNamesStack {
private static final ThreadLocal<ArrayDeque<String>> threadLocal = ThreadLocal.withInitial(ArrayDeque::new);