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/*
* Copyright (c) 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 8302202
* @summary Testing record patterns with null components
* @enablePreview
* @compile NullsInDeconstructionPatterns2.java
* @run main NullsInDeconstructionPatterns2
*/
import java.util.Objects;
import java.util.function.Function;
public class NullsInDeconstructionPatterns2 {
public static void main(String[] args) {
new NullsInDeconstructionPatterns2().run();
}
private void run() {
run1(this::test1a);
run1(this::test1b);
run2(this::test2a);
run2(this::test2b);
run3(this::test3a);
run3(this::test3b);
run4();
}
private void run1(Function<Object, String> method) {
assertEquals("R1(null)", method.apply(new R1(null)));
assertEquals("R1(!null)", method.apply(new R1("")));
}
private void run2(Function<Object, String> method) {
assertEquals("R2(null, null)", method.apply(new R2(null, null)));
assertEquals("R2(!null, null)", method.apply(new R2("", null)));
assertEquals("R2(null, !null)", method.apply(new R2(null, "")));
assertEquals("R2(!null, !null)", method.apply(new R2("", "")));
}
private void run3(Function<Object, String> method) {
assertEquals("R3(null, null, null)", method.apply(new R3(null, null, null)));
assertEquals("R3(!null, null, null)", method.apply(new R3("", null, null)));
assertEquals("R3(null, !null, null)", method.apply(new R3(null, "", null)));
assertEquals("R3(!null, !null, null)", method.apply(new R3("", "", null)));
assertEquals("R3(null, null, !null)", method.apply(new R3(null, null, "")));
assertEquals("R3(!null, null, !null)", method.apply(new R3("", null, "")));
assertEquals("R3(null, !null, !null)", method.apply(new R3(null, "", "")));
assertEquals("R3(!null, !null, !null)", method.apply(new R3("", "", "")));
}
private void run4() {
assertEquals("integer", test4(new R1(0)));
assertEquals("empty", test4(new R1("")));
assertEquals("default", test4(new R1("a")));
}
private String test1a(Object i) {
return switch (i) {
case R1(Object o) when o == null -> "R1(null)";
case R1(Object o) when o != null -> "R1(!null)";
default -> "default";
};
}
private String test1b(Object i) {
return switch (i) {
case R1(Object o) when o == null -> "R1(null)";
case R1(Object o) -> "R1(!null)";
default -> "default";
};
}
private String test2a(Object i) {
return switch (i) {
case R2(Object o1, Object o2) when o1 == null && o2 == null -> "R2(null, null)";
case R2(Object o1, Object o2) when o1 != null && o2 == null -> "R2(!null, null)";
case R2(Object o1, Object o2) when o1 == null && o2 != null -> "R2(null, !null)";
case R2(Object o1, Object o2) when o1 != null && o2 != null -> "R2(!null, !null)";
default -> "default";
};
}
private String test2b(Object i) {
return switch (i) {
case R2(Object o1, Object o2) when o1 == null && o2 == null -> "R2(null, null)";
case R2(Object o1, Object o2) when o1 != null && o2 == null -> "R2(!null, null)";
case R2(Object o1, Object o2) when o1 == null && o2 != null -> "R2(null, !null)";
case R2(Object o1, Object o2) -> "R2(!null, !null)";
default -> "default";
};
}
private String test3a(Object i) {
return switch (i) {
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 == null -> "R3(null, null, null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 == null -> "R3(!null, null, null)";
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 == null -> "R3(null, !null, null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 != null && o3 == null -> "R3(!null, !null, null)";
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 != null -> "R3(null, null, !null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 != null -> "R3(!null, null, !null)";
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 != null -> "R3(null, !null, !null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 != null && o3 != null -> "R3(!null, !null, !null)";
default -> "default";
};
}
private String test3b(Object i) {
return switch (i) {
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 == null -> "R3(null, null, null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 == null -> "R3(!null, null, null)";
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 == null -> "R3(null, !null, null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 != null && o3 == null -> "R3(!null, !null, null)";
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 != null -> "R3(null, null, !null)";
case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 != null -> "R3(!null, null, !null)";
case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 != null -> "R3(null, !null, !null)";
case R3(Object o1, Object o2, Object o3) -> "R3(!null, !null, !null)";
default -> "default";
};
}
private String test4(Object i) {
return switch (i) {
case R1(Integer o) -> "integer";
case R1(Object o) when o.toString().isEmpty() -> "empty";
default -> "default";
};
}
private static void assertEquals(String expected, String actual) {
if (!Objects.equals(expected, actual)) {
throw new AssertionError("Unexpected result, expected: " + expected + "," +
" actual: " + actual);
}
}
record R1(Object o) {}
record R2(Object o1, Object o2) {}
record R3(Object o1, Object o2, Object o3) {}
}
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