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/*
* @test /nodynamiccopyright/
* @bug 8262891 8272776
* @summary Check null handling for non-pattern switches.
*/
public class NullSwitch {
public static void main(String[] args) {
new NullSwitch().switchTest();
}
void switchTest() {
assertEquals(0, matchingSwitch1(""));
assertEquals(1, matchingSwitch1("a"));
assertEquals(100, matchingSwitch1(0));
assertEquals(-1, matchingSwitch1(null));
assertEquals(-2, matchingSwitch1(0.0));
assertEquals(0, matchingSwitch2(""));
assertEquals(1, matchingSwitch2(null));
assertEquals(1, matchingSwitch2(0.0));
assertEquals(0, matchingSwitch3(""));
assertEquals(1, matchingSwitch3("a"));
assertEquals(100, matchingSwitch3(0));
assertEquals(-1, matchingSwitch3(null));
assertEquals(-2, matchingSwitch3(0.0));
assertEquals(0, matchingSwitch5(""));
assertEquals(1, matchingSwitch5("a"));
assertEquals(100, matchingSwitch5(0));
assertEquals(-1, matchingSwitch5(null));
assertEquals(-2, matchingSwitch5(0.0));
assertEquals(0, matchingSwitch6(""));
assertEquals(1, matchingSwitch6(null));
assertEquals(1, matchingSwitch6(0.0));
assertEquals(0, matchingSwitch7(""));
assertEquals(1, matchingSwitch7("a"));
assertEquals(100, matchingSwitch7(0));
assertEquals(-1, matchingSwitch7(null));
assertEquals(-2, matchingSwitch7(0.0));
assertEquals(0, matchingSwitch8(""));
assertEquals(1, matchingSwitch8(null));
assertEquals(1, matchingSwitch8(0.0));
assertEquals(0, matchingSwitch9a(""));
assertEquals(1, matchingSwitch9a(null));
assertEquals(1, matchingSwitch9a(0.0));
assertEquals(0, matchingSwitch10a(""));
assertEquals(1, matchingSwitch10a(null));
assertEquals(1, matchingSwitch10a(0.0));
assertEquals(0, matchingSwitch9b(""));
assertEquals(2, matchingSwitch9b(null));
assertEquals(1, matchingSwitch9b(0.0));
assertEquals(0, matchingSwitch10b(""));
assertEquals(2, matchingSwitch10b(null));
assertEquals(1, matchingSwitch10b(0.0));
assertEquals(0, matchingSwitch11(""));
assertEquals(2, matchingSwitch11(null));
assertEquals(1, matchingSwitch11(0.0));
assertEquals(0, matchingSwitch12(""));
assertEquals(2, matchingSwitch12(null));
assertEquals(1, matchingSwitch12(0.0));
assertEquals(0, matchingSwitch13(""));
assertEquals(1, matchingSwitch13(0.0));
assertEquals(2, matchingSwitch13(null));
// record classes and null
assertEquals(1, matchingSwitch14(new R(null)));
assertEquals(2, matchingSwitch15(new R(null)));
}
class Super {}
class Sub extends Super {}
record R(Super s) {}
private int matchingSwitch14(R r) {
return switch(r) {
case R(Super s) -> 1;
default -> 2;
};
}
private int matchingSwitch15(R r) {
return switch(r) {
case R(Sub s) -> 1;
default -> 2;
};
}
private int matchingSwitch1(Object obj) {
return switch (obj) {
case String s -> s.length();
case Integer i -> 100 + i;
case null -> -1;
default -> -2;
};
}
private int matchingSwitch2(Object obj) {
return switch (obj) {
case String s -> 0;
case null, default -> 1;
};
}
private int matchingSwitch3(Object obj) {
return switch (obj) {
case String s -> s.length();
case Integer i -> 100 + i;
case null -> -1;
default -> -2;
};
}
private int matchingSwitch5(Object obj) {
return switch (obj) {
case String s: yield s.length();
case null: yield -1;
case Integer i: yield 100 + i;
default: yield -2;
};
}
private int matchingSwitch6(Object obj) {
return switch (obj) {
case String s: yield 0;
case null: yield 1;
default: yield 1;
};
}
private int matchingSwitch7(Object obj) {
return switch (obj) {
case String s: yield s.length();
case Integer i: yield 100 + i;
case null: yield -1;
default: yield -2;
};
}
private int matchingSwitch8(Object obj) {
return switch (obj) {
case String s: yield 0;
case null:
default: yield 1;
};
}
private int matchingSwitch9a(Object obj) {
return switch (obj) {
case String s: yield 0;
case null: yield 1;
case Object o: yield 1;
};
}
private int matchingSwitch10a(Object obj) {
switch (obj) {
case String s: return 0;
case null: return 1;
case Object o: return 1;
}
}
private int matchingSwitch9b(Object obj) {
try {
return switch (obj) {
case String s: yield 0;
case Object o: yield 1;
};
} catch (NullPointerException ex) {
return 2;
}
}
private int matchingSwitch10b(Object obj) {
try {
switch (obj) {
case String s: return 0;
case Object o: return 1;
}
} catch (NullPointerException ex) {
return 2;
}
}
private int matchingSwitch11(Object obj) {
try {
return switch (obj) {
case String s: yield 0;
default: yield 1;
};
} catch (NullPointerException ex) {
return 2;
}
}
private int matchingSwitch12(Object obj) {
try {
switch (obj) {
case String s: return 0;
default: return 1;
}
} catch (NullPointerException ex) {
return 2;
}
}
private int matchingSwitch13(Object obj) {
try {
switch (obj) {
case String s: return 0;
default: return 1;
}
} catch (NullPointerException ex) {
return 2;
}
}
static void assertEquals(int expected, int actual) {
if (expected != actual) {
throw new AssertionError("Expected: " + expected + ", actual: " + actual);
}
}
}
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