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JAVA-6303: Update "Jackson Inheritance" article

This commit is contained in:
sampadawagde 2021-09-02 23:21:16 +05:30
parent 56a9917613
commit 0595a35062
2 changed files with 36 additions and 13 deletions
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41
jackson-modules/jackson/src/test/java/com/baeldung/jackson/inheritance/SubTypeHandlingUnitTest.java
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@ -1,14 +1,22 @@
package com.baeldung.jackson.inheritance; package com.baeldung.jackson.inheritance;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test; import org.junit.Test;
import java.util.List; import com.baeldung.jackson.inheritance.SubTypeConstructorStructure.Car;
import java.util.ArrayList; import com.baeldung.jackson.inheritance.SubTypeConstructorStructure.Fleet;
import java.io.IOException; import com.baeldung.jackson.inheritance.SubTypeConstructorStructure.Truck;
import com.baeldung.jackson.inheritance.SubTypeConstructorStructure.Vehicle;
import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.BasicPolymorphicTypeValidator;
import com.fasterxml.jackson.databind.jsontype.PolymorphicTypeValidator;
public class SubTypeHandlingUnitTest { public class SubTypeHandlingUnitTest {
@Test @Test
@ -23,21 +31,30 @@ public class SubTypeHandlingUnitTest {
} }
@Test @Test
public void givenSubType_whenNotUsingNoArgsConstructors_thenSucceed() throws IOException { public void givenSubType_whenNotUsingNoArgsConstructors_thenSucceed() throws IOException {
ObjectMapper mapper = new ObjectMapper(); ObjectMapper mapper = new ObjectMapper();
mapper.enableDefaultTyping(); PolymorphicTypeValidator ptv = BasicPolymorphicTypeValidator.builder()
.allowIfSubType("com.baeldung.jackson.inheritance")
.allowIfSubType("java.util.ArrayList")
.build();
mapper.activateDefaultTyping(ptv, ObjectMapper.DefaultTyping.NON_FINAL);
Car car = new Car("Mercedes-Benz", "S500", 5, 250.0);
Truck truck = new Truck("Isuzu", "NQR", 7500.0);
SubTypeConstructorStructure.Car car = new SubTypeConstructorStructure.Car("Mercedes-Benz", "S500", 5, 250.0); List<Vehicle> vehicles = new ArrayList<>();
SubTypeConstructorStructure.Truck truck = new SubTypeConstructorStructure.Truck("Isuzu", "NQR", 7500.0);
List<SubTypeConstructorStructure.Vehicle> vehicles = new ArrayList<>();
vehicles.add(car); vehicles.add(car);
vehicles.add(truck); vehicles.add(truck);
SubTypeConstructorStructure.Fleet serializedFleet = new SubTypeConstructorStructure.Fleet(); Fleet serializedFleet = new Fleet();
serializedFleet.setVehicles(vehicles); serializedFleet.setVehicles(vehicles);
String jsonDataString = mapper.writeValueAsString(serializedFleet); String jsonDataString = mapper.writeValueAsString(serializedFleet);
mapper.readValue(jsonDataString, SubTypeConstructorStructure.Fleet.class); mapper.readValue(jsonDataString, Fleet.class);
Fleet deserializedFleet = mapper.readValue(jsonDataString, Fleet.class);
assertThat(deserializedFleet.getVehicles().get(0), instanceOf(Car.class));
assertThat(deserializedFleet.getVehicles().get(1), instanceOf(Truck.class));
} }
} }

8
jackson-modules/jackson/src/test/java/com/baeldung/jackson/inheritance/TypeInfoInclusionUnitTest.java
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@ -10,12 +10,18 @@ import java.util.ArrayList;
import java.io.IOException; import java.io.IOException;
import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.BasicPolymorphicTypeValidator;
import com.fasterxml.jackson.databind.jsontype.PolymorphicTypeValidator;
public class TypeInfoInclusionUnitTest { public class TypeInfoInclusionUnitTest {
@Test @Test
public void givenTypeInfo_whenAnnotatingGlobally_thenTypesAreCorrectlyRecovered() throws IOException { public void givenTypeInfo_whenAnnotatingGlobally_thenTypesAreCorrectlyRecovered() throws IOException {
ObjectMapper mapper = new ObjectMapper(); ObjectMapper mapper = new ObjectMapper();
mapper.enableDefaultTyping(); PolymorphicTypeValidator ptv = BasicPolymorphicTypeValidator.builder()
.allowIfSubType("com.baeldung.jackson.inheritance")
.allowIfSubType("java.util.ArrayList")
.build();
mapper.activateDefaultTyping(ptv, ObjectMapper.DefaultTyping.NON_FINAL);
TypeInfoStructure.Car car = new TypeInfoStructure.Car("Mercedes-Benz", "S500", 5, 250.0); TypeInfoStructure.Car car = new TypeInfoStructure.Car("Mercedes-Benz", "S500", 5, 250.0);
TypeInfoStructure.Truck truck = new TypeInfoStructure.Truck("Isuzu", "NQR", 7500.0); TypeInfoStructure.Truck truck = new TypeInfoStructure.Truck("Isuzu", "NQR", 7500.0);