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testdata for IDEA-136856

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Anna Kozlova
2015-02-23 14:05:36 +01:00
parent 64ce89956b
commit 8b7325aae5
2 changed files with 97 additions and 0 deletions
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43
java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/regression/IDEA136856.java Normal file
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import java.util.Optional;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Collector;
class Test {
public static final <T> Collector<T, AtomicReference<T>, Optional<T>> toSingleton() {
return Collector.of(
AtomicReference::new,
(ref, v) -> {
if (!ref.compareAndSet(null, v) && v != null) {
throw new IllegalStateException("There is only one elvis.");
}
},
(left, right) -> setOrFail(left, right.get()),
ref -> Optional.of(ref.get())
);
}
public static final <T> Collector<T, AtomicReference<T>, Optional<T>> toSingleton1() {
return Collector.of(
AtomicReference::new,
(ref, v) -> setOrFail(ref, v),
(left, right) -> setOrFail(left, right.get()),
ref -> Optional.of(ref.get())
);
}
public static final <T> Collector<T, AtomicReference<T>, Optional<T>> toSingleton2() {
return Collector.of(
AtomicReference::new,
Test::setOrFail,
(left, right) -> setOrFail(left, right.get()),
ref -> Optional.of(ref.get())
);
}
private static final <T> AtomicReference<T> setOrFail(AtomicReference<T> ref, T v) {
if (!ref.compareAndSet(null, v) && v != null) {
throw new IllegalStateException("There is only one elvis.");
}
return ref;
}
}