com.DA.assignment1.Query.Question2.java Source code

Introduction

Here is the source code for com.DA.assignment1.Query.Question2.java

Source

package com.DA.assignment1.Query;

import com.mongodb.Block;
import com.mongodb.MongoClient;
import com.mongodb.client.AggregateIterable;
import com.mongodb.client.MongoDatabase;
import java.util.Arrays;
import static java.util.Arrays.asList;
import java.util.List;
import org.bson.Document;

/*
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/**
 *
 * @author Dan
 */
public class Question2 {

    public void Answer() {

        MongoClient mongoClient = new MongoClient();
        MongoDatabase db = mongoClient.getDatabase("test");

        AggregateIterable<Document> iterable = db.getCollection("movies")
                .aggregate(asList(new Document("$unwind", "$generes"),
                        new Document("$group",
                                new Document("_id", "$generes").append("count", new Document("$sum", 1))),
                        new Document("$sort", new Document("count", -1))));

        iterable.forEach(new Block<Document>() {
            @Override
            public void apply(final Document document) {
                System.out.println(document.toJson());
            }
        });

    }

}