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/*
* Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8291769 8301858 8304694 8304883
* @summary Verify more complex switches work properly
* @compile DeconstructionDesugaring.java
* @run main DeconstructionDesugaring
*/
import java.util.Objects;
import java.util.function.ToIntFunction;
public class DeconstructionDesugaring {
public static void main(String... args) throws Throwable {
new DeconstructionDesugaring().test();
}
private void test() {
test(this::runCheckStatement);
test(this::runCheckExpression);
assertEquals(runCheckExpressionWithUnconditional(new R5(new R4(new Sub3()))), 3);
assertEquals(runCheckExpressionWithUnconditional(new R5(new R4(null))), 3);
assertEquals(runCheckExpressionWithUnconditional1(new R5(new R4(null))), 2);
assertEquals(runCheckExpressionWithUnconditional1(new R5(null)), 3);
assertEquals(runCheckExpressionWithUnconditionalAndParams(new R1(42)), 1);
assertEquals(runCheckExpressionWithUnconditionalAndParams(new R1(new Object())), 2);
assertEquals(switchNullable1(new R6(0, 0)), "int: 0, int: 0");
assertEquals(switchNullable1(new R6(0L, 0)), "obj: 0, obj: 0");
assertEquals(switchNullable2(new R6(0, 0)), "int: 0, int: 0");
assertEquals(switchNullable2(new R6(0L, 0)), "obj: 0, int: 0");
assertEquals(switchNullable2(new R6(0, 0L)), "int: 0, obj: 0");
assertEquals(switchNullable2(new R6(0L, 0L)), "obj: 0, obj: 0");
assertEquals(switchNullableNPE(new R6(1, 1)), "obj: 1, obj: 1");
try {
switchNullableNPE(new R6(null, 1));
throw new AssertionError("Expected NPE, but got none.");
} catch (NullPointerException ex) {
//expected.
}
assertEquals(runFallThrough(new R7(1, 1)), 0);
assertEquals(runFallThrough(new R7(0, 0)), 1);
}
private void test(ToIntFunction<Object> task) {
assertEquals(1, task.applyAsInt(new R1(new R2(""))));
assertEquals(2, task.applyAsInt(new R1(new R2(1))));
assertEquals(3, task.applyAsInt(new R1(new R2(1.0))));
assertEquals(-1, task.applyAsInt(new R1(new R2(null))));
assertEquals(4, task.applyAsInt(new R1(new R2(new StringBuilder()))));
assertEquals(5, task.applyAsInt(new R1(new R3(""))));
assertEquals(6, task.applyAsInt(new R1(new R3(1))));
assertEquals(7, task.applyAsInt(new R1(new R3(1.0))));
assertEquals(8, task.applyAsInt(new R1(new R3(new StringBuilder()))));
assertEquals(-1, task.applyAsInt(new R1(1.0f)));
assertEquals(-1, task.applyAsInt("foo"));
}
private int runCheckStatement(Object o) {
switch (o) {
case R1(R2(String s)) -> { return 1; }
case R1(R2(Integer i)) -> { return 2; }
case R1(R2(Double d)) -> { return 3; }
case R1(R2(CharSequence cs)) -> { return 4; }
case R1(R3(String s)) -> { return 5; }
case R1(R3(Integer i)) -> { return 6; }
case R1(R3(Double f)) -> { return 7; }
case R1(R3(CharSequence cs)) -> { return 8; }
default -> { return -1; }
}
}
private int runCheckExpression(Object o) {
return switch (o) {
case R1(R2(String s)) -> 1;
case R1(R2(Integer i)) -> 2;
case R1(R2(Double d)) -> 3;
case R1(R2(CharSequence cs)) -> 4;
case R1(R3(String s)) -> 5;
case R1(R3(Integer i)) -> 6;
case R1(R3(Double f)) -> 7;
case R1(R3(CharSequence cs)) -> 8;
default -> -1;
};
}
private int runCheckExpressionWithUnconditional(R5 o) {
return switch (o) {
case R5(R4(Sub1 s)) -> 1;
case R5(R4(Sub2 s)) -> 2;
case R5(R4(Super s)) -> 3;
};
}
private int runCheckExpressionWithUnconditional1(R5 o) {
return switch (o) {
case R5(R4(Sub1 s)) -> 1;
case R5(R4(Super s)) -> 2;
case R5(Object obj) -> 3;
};
}
public static int runCheckExpressionWithUnconditionalAndParams(R1 r) {
switch (r) {
case R1(Integer i):
return meth_I(i);
case R1(Object o):
return meth_O(o);
}
}
private String switchNullable1(R6 r) {
return switch (r) {
case R6(Integer i1, Integer i2) -> "int: " + i1 + ", int: " + i2;
case R6(Object o1, Object o2) -> "obj: " + o1 + ", obj: " + o2;
};
}
private String switchNullable2(R6 r) {
return switch (r) {
case R6(Integer i1, Integer i2) -> "int: " + i1 + ", int: " + i2;
case R6(Integer i1, Object o2) -> "int: " + i1 + ", obj: " + o2;
case R6(Object o1, Integer i2) -> "obj: " + o1 + ", int: " + i2;
case R6(Object o1, Object o2) -> "obj: " + o1 + ", obj: " + o2;
};
}
private String switchNullableNPE(R6 r) {
return switch (r) {
case R6(Object o1, Object o2) when ((int) o1) == 0 && ((int) o2) == 0 -> "int: " + o1 + ", int: " + o2;
case R6(Object o1, Object o2) -> "obj: " + o1 + ", obj: " + o2;
};
}
public static int runFallThrough(R7 r) {
switch (r) {
case R7(var v1, var v2) when v1 != 0: return 0;
case R7(var v1, var v2):
}
return 1;
}
public static int meth_I(Integer i) { return 1; }
public static int meth_O(Object o) { return 2;}
private void assertEquals(int expected, int actual) {
if (expected != actual) {
throw new AssertionError("expected: " + expected + ", " +
"actual: " + actual);
}
}
private void assertEquals(String expected, String actual) {
if (!Objects.equals(expected, actual)) {
throw new AssertionError("expected: " + expected + ", " +
"actual: " + actual);
}
}
record R1(Object o) {}
record R2(Object o) {}
record R3(Object o) {}
sealed class Super permits Sub1, Sub2, Sub3 {}
final class Sub1 extends Super {}
final class Sub2 extends Super {}
final class Sub3 extends Super {}
record R4(Super o) {}
record R5(R4 o) {}
record R6(Object o1, Object o2) {}
record R7(int i1, int i2) {}
}
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