How to convert a BasicDBObject to a Mongo Document with the Java Mongo DB driver version 3?

Question

In the Java Mongo DB driver version 3 the API has changed as compared to the version 2. So a code like this does not compile anymore:

BasicDBObject personObj = new BasicDBObject();
collection.insert(personObj) 

A Collection insert works only with a Mongo Document.

Dealing with the old code I need to ask the question:

What is the best way to convert a BasicDBObject to a Document?

Answer 1

We Can Convert BasicDBObject to Document by the following way

public static Document getDocument(DBObject doc)
{
   if(doc == null) return null;
   return new Document(doc.toMap());
}

as Document itself is an implementation of Map<String,Object>.

and BasicDBObject can be too be catch in DBObject as BasicDBObject is an implementation of DBObject.

@Black_Rider for you too

Answer 2

The Document is very similar to the BasicDBObject. I am not quite sure what you are referring to as a way to convert BasicDBObjects to Documents, but the Document object provides some very useful methods.

Document.parse(string) will return a Document if you feed it in a JSON string.

Document.append("key", Value) will add to the fields of a Document.

As for the code in your post, this should compile with version 3:

Document personObj = new Document();
collection.insertOne(personObj) 

See

Java Driver 3.0 Guide

and

MongoDB Java Driver 3.0 Documentation