/
NestedPolymorphismTest.java
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/
NestedPolymorphismTest.java
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/*
* Copyright (c) 2021, 2023 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
package org.eclipse.yasson.customization.polymorphism;
import jakarta.json.bind.annotation.JsonbSubtype;
import jakarta.json.bind.annotation.JsonbTypeInfo;
import org.eclipse.yasson.Jsonbs;
import org.junit.jupiter.api.Test;
import static org.eclipse.yasson.Jsonbs.defaultJsonb;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
/**
* Tests for verification of proper polymorphism handling based on annotation.
*/
public class NestedPolymorphismTest {
/**
* 1st test for: https://github.com/eclipse-ee4j/yasson/issues/589
* <p>(deserialization of nested polymorphic and unmapped properties)
*/
@Test
public void testNestedUnmappedProperty() {
String json = "{\"inner\":{\"id\":123,\"@type\":\"derivationA\","
+ "\"unmapped\":{\"x\":9,\"y\":[9,8,7]},\"name\":\"abc\"}}";
Outer obj = assertDoesNotThrow(() -> defaultJsonb.fromJson(json, Outer.class));
assertEquals(123L, obj.inner.id);
assertEquals("abc", obj.inner.name);
}
// a base class
@JsonbTypeInfo(key = "@type", value =
@JsonbSubtype(type = InnerBase.class, alias = "derivationA"))
public static class InnerBase {
public Long id;
public String name;
}
// derivation of the base class
public class Derivation extends InnerBase {}
// an arbitrary 'outer' root element
public static class Outer {
public InnerBase inner;
}
/**
* 2nd test for: https://github.com/eclipse-ee4j/yasson/issues/589
* <p>(deserialization of multiple nested polymorphic properties)
*/
@Test
public void testNestedDeserialization() {
String json = "{\"@type\":\"Pets\",\"pet1\":{\"@type\":\"Cat\",\"name\":\"kitty\"}"
+ ",\"pet2\":{\"@type\":\"Dog\",\"name\":\"puppy\"}}";
final Animals animals = Jsonbs.defaultJsonb.fromJson(json, Animals.class);
assertThat(animals, instanceOf(Pets.class));
assertNotNull(((Pets) animals).pet1, "Empty 'pet1' property");
assertEquals("kitty", ((Cat) ((Pets) animals).pet1).name, "First pet has invalid name");
assertNotNull(((Pets) animals).pet2, "Empty 'pet2' property");
assertThat("Invalid pet nr 2", ((Pets) animals).pet2, instanceOf(Dog.class));
}
@JsonbTypeInfo(key = "@type", value = {
@JsonbSubtype(alias = "Dog", type = Dog.class),
@JsonbSubtype(alias = "Cat", type = Cat.class)
})
public interface Pet {
public String getType();
}
public static class Dog implements Pet {
public String name;
@Override
public String getType() {
return "Dog";
}
}
public static class Cat implements Pet {
public String name;
@Override
public String getType() {
return "Cat";
}
}
@JsonbTypeInfo(key = "@type", value = {
@JsonbSubtype(alias = "Pets", type = Pets.class),
@JsonbSubtype(alias = "Fishes", type = Fishes.class)
})
public interface Animals {
}
public static class Pets implements Animals {
public Pet pet1;
public Pet pet2;
}
public static class Fishes implements Animals {
}
}