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Add jackson bidirectional relationship test

This commit is contained in:
DOHA 2014-12-30 21:44:39 +02:00
parent 983823dbfa
commit 4cee202068
13 changed files with 394 additions and 0 deletions
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19
jackson/src/test/java/org/baeldung/jackson/bidirection/CustomListDeserializer.java Normal file
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package org.baeldung.jackson.bidirection;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
public class CustomListDeserializer extends JsonDeserializer<List<ItemWithSerializer>> {
@Override
public List<ItemWithSerializer> deserialize(final JsonParser jsonparser, final DeserializationContext context) throws IOException, JsonProcessingException {
return new ArrayList<ItemWithSerializer>();
}
}

22
jackson/src/test/java/org/baeldung/jackson/bidirection/CustomListSerializer.java Normal file
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package org.baeldung.jackson.bidirection;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
public class CustomListSerializer extends JsonSerializer<List<ItemWithSerializer>> {
@Override
public void serialize(final List<ItemWithSerializer> items, final JsonGenerator generator, final SerializerProvider provider) throws IOException, JsonProcessingException {
final List<Integer> ids = new ArrayList<Integer>();
for (final ItemWithSerializer item : items) {
ids.add(item.id);
}
generator.writeObject(ids);
}
}

18
jackson/src/test/java/org/baeldung/jackson/bidirection/Item.java Normal file
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package org.baeldung.jackson.bidirection;
public class Item {
public int id;
public String itemName;
public User owner;
public Item() {
super();
}
public Item(final int id, final String itemName, final User owner) {
this.id = id;
this.itemName = itemName;
this.owner = owner;
}
}

21
jackson/src/test/java/org/baeldung/jackson/bidirection/ItemWithIdentity.java Normal file
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package org.baeldung.jackson.bidirection;
import com.fasterxml.jackson.annotation.JsonIdentityInfo;
import com.fasterxml.jackson.annotation.ObjectIdGenerators;
@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
public class ItemWithIdentity {
public int id;
public String itemName;
public UserWithIdentity owner;
public ItemWithIdentity() {
super();
}
public ItemWithIdentity(final int id, final String itemName, final UserWithIdentity owner) {
this.id = id;
this.itemName = itemName;
this.owner = owner;
}
}

18
jackson/src/test/java/org/baeldung/jackson/bidirection/ItemWithIgnore.java Normal file
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package org.baeldung.jackson.bidirection;
public class ItemWithIgnore {
public int id;
public String itemName;
public UserWithIgnore owner;
public ItemWithIgnore() {
super();
}
public ItemWithIgnore(final int id, final String itemName, final UserWithIgnore owner) {
this.id = id;
this.itemName = itemName;
this.owner = owner;
}
}

21
jackson/src/test/java/org/baeldung/jackson/bidirection/ItemWithRef.java Normal file
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package org.baeldung.jackson.bidirection;
import com.fasterxml.jackson.annotation.JsonManagedReference;
public class ItemWithRef {
public int id;
public String itemName;
@JsonManagedReference
public UserWithRef owner;
public ItemWithRef() {
super();
}
public ItemWithRef(final int id, final String itemName, final UserWithRef owner) {
this.id = id;
this.itemName = itemName;
this.owner = owner;
}
}

18
jackson/src/test/java/org/baeldung/jackson/bidirection/ItemWithSerializer.java Normal file
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package org.baeldung.jackson.bidirection;
public class ItemWithSerializer {
public int id;
public String itemName;
public UserWithSerializer owner;
public ItemWithSerializer() {
super();
}
public ItemWithSerializer(final int id, final String itemName, final UserWithSerializer owner) {
this.id = id;
this.itemName = itemName;
this.owner = owner;
}
}

24
jackson/src/test/java/org/baeldung/jackson/bidirection/User.java Normal file
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package org.baeldung.jackson.bidirection;
import java.util.ArrayList;
import java.util.List;
public class User {
public int id;
public String name;
public List<Item> userItems;
public User() {
super();
}
public User(final int id, final String name) {
this.id = id;
this.name = name;
userItems = new ArrayList<Item>();
}
public void addItem(final Item item) {
userItems.add(item);
}
}

28
jackson/src/test/java/org/baeldung/jackson/bidirection/UserWithIdentity.java Normal file
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package org.baeldung.jackson.bidirection;
import java.util.ArrayList;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonIdentityInfo;
import com.fasterxml.jackson.annotation.ObjectIdGenerators;
@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
public class UserWithIdentity {
public int id;
public String name;
public List<ItemWithIdentity> userItems;
public UserWithIdentity() {
super();
}
public UserWithIdentity(final int id, final String name) {
this.id = id;
this.name = name;
userItems = new ArrayList<ItemWithIdentity>();
}
public void addItem(final ItemWithIdentity item) {
userItems.add(item);
}
}

28
jackson/src/test/java/org/baeldung/jackson/bidirection/UserWithIgnore.java Normal file
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package org.baeldung.jackson.bidirection;
import java.util.ArrayList;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonIgnore;
public class UserWithIgnore {
public int id;
public String name;
@JsonIgnore
public List<ItemWithIgnore> userItems;
public UserWithIgnore() {
super();
}
public UserWithIgnore(final int id, final String name) {
this.id = id;
this.name = name;
userItems = new ArrayList<ItemWithIgnore>();
}
public void addItem(final ItemWithIgnore item) {
userItems.add(item);
}
}

28
jackson/src/test/java/org/baeldung/jackson/bidirection/UserWithRef.java Normal file
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package org.baeldung.jackson.bidirection;
import java.util.ArrayList;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonBackReference;
public class UserWithRef {
public int id;
public String name;
@JsonBackReference
public List<ItemWithRef> userItems;
public UserWithRef() {
super();
}
public UserWithRef(final int id, final String name) {
this.id = id;
this.name = name;
userItems = new ArrayList<ItemWithRef>();
}
public void addItem(final ItemWithRef item) {
userItems.add(item);
}
}

30
jackson/src/test/java/org/baeldung/jackson/bidirection/UserWithSerializer.java Normal file
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package org.baeldung.jackson.bidirection;
import java.util.ArrayList;
import java.util.List;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
public class UserWithSerializer {
public int id;
public String name;
@JsonSerialize(using = CustomListSerializer.class)
@JsonDeserialize(using = CustomListDeserializer.class)
public List<ItemWithSerializer> userItems;
public UserWithSerializer() {
super();
}
public UserWithSerializer(final int id, final String name) {
this.id = id;
this.name = name;
userItems = new ArrayList<ItemWithSerializer>();
}
public void addItem(final ItemWithSerializer item) {
userItems.add(item);
}
}

119
jackson/src/test/java/org/baeldung/jackson/test/JacksonBidirectionRelationTest.java Normal file
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package org.baeldung.jackson.test;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.not;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import java.io.IOException;
import org.baeldung.jackson.bidirection.Item;
import org.baeldung.jackson.bidirection.ItemWithIdentity;
import org.baeldung.jackson.bidirection.ItemWithIgnore;
import org.baeldung.jackson.bidirection.ItemWithRef;
import org.baeldung.jackson.bidirection.ItemWithSerializer;
import org.baeldung.jackson.bidirection.User;
import org.baeldung.jackson.bidirection.UserWithIdentity;
import org.baeldung.jackson.bidirection.UserWithIgnore;
import org.baeldung.jackson.bidirection.UserWithRef;
import org.baeldung.jackson.bidirection.UserWithSerializer;
import org.junit.Test;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonBidirectionRelationTest {
@Test(expected = JsonMappingException.class)
public void givenBidirectionRelation_whenSerialize_thenException() throws JsonProcessingException {
final User user = new User(1, "John");
final Item item = new Item(2, "book", user);
user.addItem(item);
final ObjectMapper mapper = new ObjectMapper();
mapper.writeValueAsString(item);
}
@Test
public void givenBidirectionRelation_whenUseJacksonReferenceAnnotation_thenCorrect() throws JsonProcessingException {
final UserWithRef user = new UserWithRef(1, "John");
final ItemWithRef item = new ItemWithRef(2, "book", user);
user.addItem(item);
final ObjectMapper mapper = new ObjectMapper();
final String result = mapper.writeValueAsString(item);
assertThat(result, containsString("book"));
assertThat(result, containsString("John"));
assertThat(result, not(containsString("userItems")));
}
@Test
public void givenBidirectionRelation_whenUseJsonIdentityInfo_thenCorrect() throws JsonProcessingException {
final UserWithIdentity user = new UserWithIdentity(1, "John");
final ItemWithIdentity item = new ItemWithIdentity(2, "book", user);
user.addItem(item);
final ObjectMapper mapper = new ObjectMapper();
final String result = mapper.writeValueAsString(item);
assertThat(result, containsString("book"));
assertThat(result, containsString("John"));
assertThat(result, containsString("userItems"));
}
@Test
public void givenBidirectionRelation_whenUseJsonIgnore_thenCorrect() throws JsonProcessingException {
final UserWithIgnore user = new UserWithIgnore(1, "John");
final ItemWithIgnore item = new ItemWithIgnore(2, "book", user);
user.addItem(item);
final ObjectMapper mapper = new ObjectMapper();
final String result = mapper.writeValueAsString(item);
assertThat(result, containsString("book"));
assertThat(result, containsString("John"));
assertThat(result, not(containsString("userItems")));
}
@Test
public void givenBidirectionRelation_whenUseCustomSerializer_thenCorrect() throws JsonProcessingException {
final UserWithSerializer user = new UserWithSerializer(1, "John");
final ItemWithSerializer item = new ItemWithSerializer(2, "book", user);
user.addItem(item);
final ObjectMapper mapper = new ObjectMapper();
final String result = mapper.writeValueAsString(item);
assertThat(result, containsString("book"));
assertThat(result, containsString("John"));
assertThat(result, containsString("userItems"));
}
@Test
public void givenBidirectionRelation_whenDeserializeUsingIdentity_thenCorrect() throws JsonProcessingException, IOException {
final String json = "{\"id\":2,\"itemName\":\"book\",\"owner\":{\"id\":1,\"name\":\"John\",\"userItems\":[2]}}";
final ObjectMapper mapper = new ObjectMapper();
final ItemWithIdentity item = mapper.reader(ItemWithIdentity.class).readValue(json);
assertEquals(2, item.id);
assertEquals("book", item.itemName);
assertEquals("John", item.owner.name);
}
@Test
public void givenBidirectionRelation_whenUseCustomDeserializer_thenCorrect() throws JsonProcessingException, IOException {
final String json = "{\"id\":2,\"itemName\":\"book\",\"owner\":{\"id\":1,\"name\":\"John\",\"userItems\":[2]}}";
final ObjectMapper mapper = new ObjectMapper();
final ItemWithSerializer item = mapper.reader(ItemWithSerializer.class).readValue(json);
assertEquals(2, item.id);
assertEquals("book", item.itemName);
assertEquals("John", item.owner.name);
}
}