jackson skip conditionally
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DOHA
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package org.baeldung.jackson.dynamicIgnore;
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public class Address implements Hidable {
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private String city;
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private String country;
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private boolean hidden;
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public Address(final String city, final String country, final boolean hidden) {
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super();
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this.city = city;
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this.country = country;
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this.hidden = hidden;
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}
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public String getCity() {
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return city;
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}
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public void setCity(final String city) {
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this.city = city;
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}
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public String getCountry() {
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return country;
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}
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public void setCountry(final String country) {
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this.country = country;
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}
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@Override
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public boolean isHidden() {
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return hidden;
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}
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public void setHidden(final boolean hidden) {
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this.hidden = hidden;
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}
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}
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package org.baeldung.jackson.dynamicIgnore;
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import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
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@JsonIgnoreProperties("hidden")
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public interface Hidable {
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boolean isHidden();
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}
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package org.baeldung.jackson.dynamicIgnore;
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import java.io.IOException;
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import com.fasterxml.jackson.core.JsonGenerator;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.JsonSerializer;
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import com.fasterxml.jackson.databind.SerializerProvider;
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public class HidableSerializer extends JsonSerializer<Hidable> {
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private JsonSerializer<Object> defaultSerializer;
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public HidableSerializer(final JsonSerializer<Object> serializer) {
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defaultSerializer = serializer;
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}
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@Override
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public void serialize(final Hidable value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
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if (value.isHidden())
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return;
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defaultSerializer.serialize(value, jgen, provider);
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}
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@Override
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public boolean isEmpty(final SerializerProvider provider, final Hidable value) {
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return (value == null || value.isHidden());
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}
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}
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package org.baeldung.jackson.dynamicIgnore;
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public class Person implements Hidable {
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private String name;
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private Address address;
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private boolean hidden;
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public Person(final String name, final Address address, final boolean hidden) {
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super();
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this.name = name;
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this.address = address;
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this.hidden = hidden;
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}
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public String getName() {
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return name;
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}
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public void setName(final String name) {
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this.name = name;
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}
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public Address getAddress() {
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return address;
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}
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public void setAddress(final Address address) {
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this.address = address;
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}
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@Override
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public boolean isHidden() {
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return hidden;
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}
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public void setHidden(final boolean hidden) {
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this.hidden = hidden;
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}
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}
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package org.baeldung.jackson.test;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertTrue;
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import java.util.Arrays;
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import org.baeldung.jackson.dynamicIgnore.Address;
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import org.baeldung.jackson.dynamicIgnore.Hidable;
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import org.baeldung.jackson.dynamicIgnore.HidableSerializer;
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import org.baeldung.jackson.dynamicIgnore.Person;
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import org.junit.Before;
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import org.junit.Test;
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import com.fasterxml.jackson.annotation.JsonInclude.Include;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.BeanDescription;
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import com.fasterxml.jackson.databind.JsonSerializer;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.SerializationConfig;
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import com.fasterxml.jackson.databind.module.SimpleModule;
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import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
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public class JacksonDynamicIgnoreTest {
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private ObjectMapper mapper = new ObjectMapper();
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@Before
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public void setUp() {
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mapper.setSerializationInclusion(Include.NON_EMPTY);
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mapper.registerModule(new SimpleModule() {
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@Override
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public void setupModule(final SetupContext context) {
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super.setupModule(context);
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context.addBeanSerializerModifier(new BeanSerializerModifier() {
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@Override
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public JsonSerializer<?> modifySerializer(final SerializationConfig config, final BeanDescription beanDesc, final JsonSerializer<?> serializer) {
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if (Hidable.class.isAssignableFrom(beanDesc.getBeanClass())) {
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return new HidableSerializer((JsonSerializer<Object>) serializer);
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}
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return serializer;
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}
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});
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}
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});
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}
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@Test
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public void whenNotHidden_thenCorrect() throws JsonProcessingException {
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final Address ad = new Address("ny", "usa", false);
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final Person person = new Person("john", ad, false);
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final String result = mapper.writeValueAsString(person);
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assertTrue(result.contains("name"));
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assertTrue(result.contains("john"));
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assertTrue(result.contains("address"));
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assertTrue(result.contains("usa"));
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System.out.println("Not Hidden = " + result);
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}
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@Test
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public void whenAddressHidden_thenCorrect() throws JsonProcessingException {
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final Address ad = new Address("ny", "usa", true);
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final Person person = new Person("john", ad, false);
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final String result = mapper.writeValueAsString(person);
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assertTrue(result.contains("name"));
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assertTrue(result.contains("john"));
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assertFalse(result.contains("address"));
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assertFalse(result.contains("usa"));
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System.out.println("Address Hidden = " + result);
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}
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@Test
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public void whenAllHidden_thenCorrect() throws JsonProcessingException {
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final Address ad = new Address("ny", "usa", false);
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final Person person = new Person("john", ad, true);
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final String result = mapper.writeValueAsString(person);
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assertTrue(result.length() == 0);
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System.out.println("All Hidden = " + result);
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}
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@Test
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public void whenSerializeList_thenCorrect() throws JsonProcessingException {
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final Address ad1 = new Address("tokyo", "jp", true);
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final Address ad2 = new Address("london", "uk", false);
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final Address ad3 = new Address("ny", "usa", false);
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final Person p1 = new Person("john", ad1, false);
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final Person p2 = new Person("tom", ad2, true);
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final Person p3 = new Person("adam", ad3, false);
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final String result = mapper.writeValueAsString(Arrays.asList(p1, p2, p3));
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System.out.println(result);
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}
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}
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