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Revert to Map entry iteration for less expensive static initialization 

Issue: SPR-17169
This commit is contained in:
Juergen Hoeller 2018-08-12 20:52:55 +02:00
parent cfb1ed1009
commit df51ff0386
1 changed files with 5 additions and 4 deletions
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9
spring-core/src/main/java/org/springframework/util/ClassUtils.java
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@ -121,10 +121,11 @@ public abstract class ClassUtils {
primitiveWrapperTypeMap.put(Long.class, long.class);
primitiveWrapperTypeMap.put(Short.class, short.class);
primitiveWrapperTypeMap.forEach((key, value) -> {
primitiveTypeToWrapperMap.put(value, key);
registerCommonClasses(key);
});
// Map entry iteration is less expensive to initialize than forEach with lambdas
for (Map.Entry<Class<?>, Class<?>> entry : primitiveWrapperTypeMap.entrySet()) {
primitiveTypeToWrapperMap.put(entry.getValue(), entry.getKey());
registerCommonClasses(entry.getKey());
}
Set<Class<?>> primitiveTypes = new HashSet<>(32);
primitiveTypes.addAll(primitiveWrapperTypeMap.values());