[BAEL-2732] Adding in BSON examples from article

persistence-modules/java-mongodb/pom.xml

@@ -35,7 +35,7 @@
     <properties>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <mongo.version>3.4.1</mongo.version>
+        <mongo.version>3.10.1</mongo.version>
         <flapdoodle.version>1.11</flapdoodle.version>
     </properties>
 

persistence-modules/java-mongodb/src/main/java/com/baeldung/MongoBsonExample.java

@@ -0,0 +1,79 @@
+package com.baeldung;
+
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoClients;
+import com.mongodb.client.MongoCollection;
+import com.mongodb.client.MongoDatabase;
+import org.bson.Document;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class MongoBsonExample
+{
+   public static void main(String[] args)
+   {
+      //
+      // 4.1 Connect to cluster (default is localhost:27017)
+      //
+
+      MongoClient mongoClient = MongoClients.create();
+      MongoDatabase database = mongoClient.getDatabase("myDB");
+      MongoCollection<Document> collection = database.getCollection("employees");
+
+      //
+      // 4.2 Insert new document
+      //
+
+      Document employee = new Document()
+                             .append("first_name", "Joe")
+                             .append("last_name", "Smith")
+                             .append("title", "Java Developer")
+                             .append("years_of_service", 3)
+                             .append("skills", Arrays.asList("java", "spring", "mongodb"))
+                             .append("manager", new Document()
+                                                   .append("first_name", "Sally")
+                                                   .append("last_name", "Johanson"));
+      collection.insertOne(employee);
+
+      //
+      // 4.3 Find documents
+      //
+
+
+      Document query = new Document("last_name", "Smith");
+      List results = new ArrayList<>();
+      collection.find(query).into(results);
+
+      query =
+         new Document("$or", Arrays.asList(
+            new Document("last_name", "Smith"),
+            new Document("first_name", "Joe")));
+      results = new ArrayList<>();
+      collection.find(query).into(results);
+
+      //
+      // 4.4 Update document
+      //
+
+      query = new Document(
+         "skills",
+         new Document(
+            "$elemMatch",
+            new Document("$eq", "spring")));
+      Document update = new Document(
+         "$push",
+         new Document("skills", "security"));
+      collection.updateMany(query, update);
+
+      //
+      // 4.5 Delete documents
+      //
+
+      query = new Document(
+         "years_of_service",
+         new Document("$lt", 0));
+      collection.deleteMany(query);
+   }
+}