Guava's Throwables utility can frequently simplify dealing with exceptions.
Sometimes, when you catch an exception, you want to throw it back up to the next try/catch block. This is frequently the case for RuntimeException or Error instances, which do not require try/catch blocks, but can be caught by try/catch blocks when you don't mean them to.
Guava provides several utilities to simplify propagating exceptions. For example:
for (Foo foo : foos) {
try {
foo.bar();
} catch (BarException | RuntimeException | Error t) {
failure = t;
}
}
if (failure != null) {
throwIfInstanceOf(failure, BarException.class);
throwIfUnchecked(failure);
throw new AssertionError(failure);
}
Here are quick summaries of the propagation methods provided by Guava:
NOTE: We deprecated Throwables.propagate(Throwable) in v20.0. Read about why.
Guava makes it somewhat simpler to study the causal chain of an exception, providing three useful methods whose signatures are self-explanatory:
Throwable getRootCause(Throwable)List<Throwable> getCausalChain(Throwable)String getStackTraceAsString(Throwable)RetroSearch is an open source project built by @garambo | Open a GitHub Issue
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