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/* @test /nodynamiccopyright/
* @bug 7196163
* @summary Verify that variables can be used as operands to try-with-resources
* @compile/fail/ref=TwrForVariable1.out -source 8 -XDrawDiagnostics -Xlint:-options TwrForVariable1.java
* @compile TwrForVariable1.java
* @run main TwrForVariable1
*/
public class TwrForVariable1 implements AutoCloseable {
private static int closeCount = 0;
public static void main(String... args) {
TwrForVariable1 v = new TwrForVariable1();
try (v) {
assertCloseCount(0);
}
try (/**@deprecated*/v) {
assertCloseCount(1);
}
try (v.finalWrapper.finalField) {
assertCloseCount(2);
} catch (Exception ex) {
}
try (new TwrForVariable1() { }.finalWrapper.finalField) {
assertCloseCount(3);
} catch (Exception ex) {
}
try ((args.length > 0 ? v : new TwrForVariable1()).finalWrapper.finalField) {
assertCloseCount(4);
} catch (Exception ex) {
}
try {
throw new CloseableException();
} catch (CloseableException ex) {
try (ex) {
assertCloseCount(5);
}
}
assertCloseCount(6);
// null test cases
TwrForVariable1 n = null;
try (n) {
}
try (n) {
throw new Exception();
} catch (Exception e) {
}
assertCloseCount(6);
// initialization exception
TwrForVariable1 i1 = new TwrForVariable1();
try (i1; TwrForVariable1 i2 = new TwrForVariable1(true)) {
} catch (Exception e) {
}
assertCloseCount(7);
// multiple closures
TwrForVariable1 m1 = new TwrForVariable1();
try (m1; TwrForVariable1 m2 = m1; TwrForVariable1 m3 = m2;) {
}
assertCloseCount(10);
// aliasing of variables keeps equality (bugs 6911256 6964740)
TwrForVariable1 a1 = new TwrForVariable1();
try (a1; TwrForVariable1 a2 = a1;) {
if (a2 != a2)
throw new RuntimeException("Unexpected inequality.");
}
assertCloseCount(12);
// anonymous class implementing AutoCloseable as variable in twr
AutoCloseable a = new AutoCloseable() {
public void close() { };
};
try (a) {
} catch (Exception e) {}
}
static void assertCloseCount(int expectedCloseCount) {
if (closeCount != expectedCloseCount)
throw new RuntimeException("bad closeCount: " + closeCount +
"; expected: " + expectedCloseCount);
}
public void close() {
closeCount++;
}
final FinalWrapper finalWrapper = new FinalWrapper();
static class FinalWrapper {
public final AutoCloseable finalField = new AutoCloseable() {
@Override
public void close() throws Exception {
closeCount++;
}
};
}
static class CloseableException extends Exception implements AutoCloseable {
@Override
public void close() {
closeCount++;
}
}
public TwrForVariable1(boolean throwException) {
if (throwException)
throw new RuntimeException("Initialization exception");
}
public TwrForVariable1() {
this(false);
}
}
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