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package org.junit.internal;
/**
* Miscellaneous functions dealing with {@code Throwable}.
*
* @author kcooney@google.com (Kevin Cooney)
* @since 4.12
*/
public final class Throwables {
private Throwables() {
}
/**
* Rethrows the given {@code Throwable}, allowing the caller to
* declare that it throws {@code Exception}. This is useful when
* your callers have nothing reasonable they can do when a
* {@code Throwable} is thrown. This is declared to return {@code Exception}
* so it can be used in a {@code throw} clause:
* <pre>
* try {
* doSomething();
* } catch (Throwable e} {
* throw Throwables.rethrowAsException(e);
* }
* doSomethingLater();
* </pre>
*
* @param e exception to rethrow
* @return does not return anything
* @since 4.12
*/
public static Exception rethrowAsException(Throwable e) throws Exception {
Throwables.<Exception>rethrow(e);
return null; // we never get here
}
@SuppressWarnings("unchecked")
private static <T extends Throwable> void rethrow(Throwable e) throws T {
throw (T) e;
}
}
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