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Fix two ErrorProne warnings in TypeUtils

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1) Prefer .getConstructor().newInstance() over .newInstance()
   because otherwise checked exceptions can be propagated from
   the constructor even though they aren't declared.
2) Use the type T in the parameters to instantiate().

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138874730
This commit is contained in:
cgoldfeder 2016-11-11 07:35:06 -08:00 • committed by Ben McIlwain
parent f742ac8056
commit d5104df453
2 changed files with 7 additions and 5 deletions
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7
java/google/registry/util/TypeUtils.java
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@ -46,13 +46,12 @@ public class TypeUtils {
}
}
@SuppressWarnings("unchecked")
public static <T> T instantiate(Class<?> clazz) {
public static <T> T instantiate(Class<? extends T> clazz) {
checkArgument(Modifier.isPublic(clazz.getModifiers()),
"AppEngine's custom security manager won't let us reflectively access non-public types");
try {
return (T) clazz.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
return clazz.getConstructor().newInstance();
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}