BAEL-3943 Bson to json (#9079)
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Benjamin Caure
GitHub
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commit
bc872d3742
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@ -10,3 +10,4 @@ This module contains articles about MongoDB in Java.
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- [Geospatial Support in MongoDB](https://www.baeldung.com/mongodb-geospatial-support)
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- [Introduction to Morphia – Java ODM for MongoDB](https://www.baeldung.com/mongodb-morphia)
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- [MongoDB Aggregations Using Java](https://www.baeldung.com/java-mongodb-aggregations)
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- [MongoDB BSON to JSON](https://www.baeldung.com/bson-to-json)
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@ -1,5 +1,7 @@
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package com.baeldung.morphia.domain;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.util.HashSet;
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import java.util.Set;
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@ -29,28 +31,13 @@ public class Book {
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private double cost;
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@Reference
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private Set<Book> companionBooks;
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@Property
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private LocalDateTime publishDate;
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public Book() {
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}
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public String getTitle() {
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return title;
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}
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public String getAuthor() {
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return author;
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}
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public double getCost() {
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return cost;
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}
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public void addCompanionBooks(Book book) {
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if (companionBooks != null)
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this.companionBooks.add(book);
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}
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public Book(String isbn, String title, String author, double cost, Publisher publisher) {
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this.isbn = isbn;
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this.title = title;
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@ -60,6 +47,71 @@ public class Book {
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this.companionBooks = new HashSet<>();
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}
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// Getters and setters ...
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public String getIsbn() {
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return isbn;
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}
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public Book setIsbn(String isbn) {
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this.isbn = isbn;
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return this;
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}
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public String getTitle() {
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return title;
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}
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public Book setTitle(String title) {
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this.title = title;
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return this;
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}
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public String getAuthor() {
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return author;
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}
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public Book setAuthor(String author) {
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this.author = author;
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return this;
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}
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public Publisher getPublisher() {
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return publisher;
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}
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public Book setPublisher(Publisher publisher) {
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this.publisher = publisher;
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return this;
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}
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public double getCost() {
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return cost;
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}
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public Book setCost(double cost) {
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this.cost = cost;
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return this;
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}
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public LocalDateTime getPublishDate() {
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return publishDate;
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}
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public Book setPublishDate(LocalDateTime publishDate) {
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this.publishDate = publishDate;
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return this;
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}
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public Set<Book> getCompanionBooks() {
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return companionBooks;
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}
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public Book addCompanionBooks(Book book) {
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if (companionBooks != null)
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this.companionBooks.add(book);
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return this;
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}
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@Override
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public String toString() {
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return "Book [isbn=" + isbn + ", title=" + title + ", author=" + author + ", publisher=" + publisher + ", cost=" + cost + "]";
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@ -113,4 +165,4 @@ public class Book {
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return true;
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}
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}
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}
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@ -0,0 +1,142 @@
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package com.baeldung.bsontojson;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotNull;
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import static org.junit.Assert.assertTrue;
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import java.sql.Timestamp;
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import java.time.Instant;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.Date;
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import java.util.TimeZone;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import org.bson.Document;
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import org.bson.json.Converter;
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import org.bson.json.JsonMode;
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import org.bson.json.JsonWriterSettings;
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import org.bson.json.StrictJsonWriter;
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import org.bson.types.ObjectId;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import org.junit.jupiter.api.AfterEach;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.baeldung.morphia.domain.Book;
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import com.baeldung.morphia.domain.Publisher;
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import com.mongodb.MongoClient;
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import com.mongodb.client.MongoDatabase;
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import dev.morphia.Datastore;
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import dev.morphia.Morphia;
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public class BsonToJsonIntegrationTest {
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private static final String DB_NAME = "library";
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private static Datastore datastore;
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@BeforeClass
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public static void setUp() {
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Morphia morphia = new Morphia();
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morphia.mapPackage("com.baeldung.morphia");
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datastore = morphia.createDatastore(new MongoClient(), DB_NAME);
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datastore.ensureIndexes();
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datastore.save(new Book()
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.setIsbn("isbn")
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.setTitle("title")
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.setAuthor("author")
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.setCost(3.95)
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.setPublisher(new Publisher(new ObjectId("fffffffffffffffffffffffa"),"publisher"))
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.setPublishDate(LocalDateTime.parse("2020-01-01T18:13:32Z", DateTimeFormatter.ISO_DATE_TIME))
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.addCompanionBooks(new Book().setIsbn("isbn2")));
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}
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@AfterClass
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public static void tearDown() {
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datastore.delete(datastore.createQuery(Book.class));
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}
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@Test
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public void givenBsonDocument_whenUsingStandardJsonTransformation_thenJsonDateIsObjectEpochTime() {
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String json = null;
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try (MongoClient mongoClient = new MongoClient()) {
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MongoDatabase mongoDatabase = mongoClient.getDatabase(DB_NAME);
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Document bson = mongoDatabase.getCollection("Books").find().first();
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json = bson.toJson();
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}
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String expectedJson = "{\"_id\": \"isbn\", " +
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"\"className\": \"com.baeldung.morphia.domain.Book\", " +
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"\"title\": \"title\", " +
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"\"author\": \"author\", " +
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"\"publisher\": {\"_id\": {\"$oid\": \"fffffffffffffffffffffffa\"}, " +
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"\"name\": \"publisher\"}, " +
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"\"price\": 3.95, " +
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"\"publishDate\": {\"$date\": 1577898812000}}";
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assertNotNull(json);
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assertEquals(expectedJson, json);
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}
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@Test
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public void givenBsonDocument_whenUsingRelaxedJsonTransformation_thenJsonDateIsObjectIsoDate() {
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String json = null;
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try (MongoClient mongoClient = new MongoClient()) {
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MongoDatabase mongoDatabase = mongoClient.getDatabase(DB_NAME);
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Document bson = mongoDatabase.getCollection("Books").find().first();
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json = bson.toJson(JsonWriterSettings
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.builder()
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.outputMode(JsonMode.RELAXED)
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.build());
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}
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String expectedJson = "{\"_id\": \"isbn\", " +
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"\"className\": \"com.baeldung.morphia.domain.Book\", " +
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"\"title\": \"title\", " +
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"\"author\": \"author\", " +
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"\"publisher\": {\"_id\": {\"$oid\": \"fffffffffffffffffffffffa\"}, " +
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"\"name\": \"publisher\"}, " +
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"\"price\": 3.95, " +
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"\"publishDate\": {\"$date\": \"2020-01-01T17:13:32Z\"}}";
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assertNotNull(json);
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assertEquals(expectedJson, json);
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}
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@Test
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public void givenBsonDocument_whenUsingCustomJsonTransformation_thenJsonDateIsStringField() {
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String json = null;
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try (MongoClient mongoClient = new MongoClient()) {
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MongoDatabase mongoDatabase = mongoClient.getDatabase(DB_NAME);
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Document bson = mongoDatabase.getCollection("Books").find().first();
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json = bson.toJson(JsonWriterSettings
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.builder()
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.dateTimeConverter(new JsonDateTimeConverter())
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.build());
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}
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String expectedJson = "{\"_id\": \"isbn\", " +
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"\"className\": \"com.baeldung.morphia.domain.Book\", " +
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"\"title\": \"title\", " +
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"\"author\": \"author\", " +
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"\"publisher\": {\"_id\": {\"$oid\": \"fffffffffffffffffffffffa\"}, " +
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"\"name\": \"publisher\"}, " +
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"\"price\": 3.95, " +
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"\"publishDate\": \"2020-01-01T17:13:32Z\"}";
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assertEquals(expectedJson, json);
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}
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}
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@ -0,0 +1,30 @@
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package com.baeldung.bsontojson;
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import java.time.Instant;
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import java.time.ZoneId;
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import java.time.format.DateTimeFormatter;
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import java.util.Date;
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import java.util.TimeZone;
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import org.bson.json.Converter;
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import org.bson.json.StrictJsonWriter;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class JsonDateTimeConverter implements Converter<Long> {
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private static final Logger LOGGER = LoggerFactory.getLogger(JsonDateTimeConverter.class);
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static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ISO_INSTANT
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.withZone(ZoneId.of("UTC"));
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@Override
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public void convert(Long value, StrictJsonWriter writer) {
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try {
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Instant instant = new Date(value).toInstant();
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String s = DATE_TIME_FORMATTER.format(instant);
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writer.writeString(s);
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} catch (Exception e) {
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LOGGER.error(String.format("Fail to convert offset %d to JSON date", value), e);
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}
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}
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}
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