mongodb.findPagging.java Source code

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Here is the source code for mongodb.findPagging.java

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/*
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//
//Paging Through Documents in a Collection Using Java.

package mongodb;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;

/**
 *
 * @author soham
 */
public class findPagging {
    public static void main(String[] args) {
        try {
            MongoClient mongoClient = new MongoClient("localhost", 27017);
            DB db = mongoClient.getDB("words");
            DBCollection collection = db.getCollection("word_stats");
            findPagging.pageResults(collection, 0);
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public static void displayCursor(DBCursor cursor) {
        String words = "";
        while (cursor.hasNext()) {
            DBObject doc = cursor.next();
            words = words.concat(doc.get("word").toString()).concat(",");
        }
        if (words.length() > 65) {
            words = words.substring(0, 65) + "...";
        }
        System.out.println(words);
    }

    public static void pageResults(DBCollection collection, Integer skip) {
        BasicDBObject query = new BasicDBObject("first", "w");
        DBCursor cursor = collection.find(query);
        cursor.sort(new BasicDBObject("word", 1));
        cursor.limit(10);
        cursor.skip(skip);
        System.out.println("Page " + new Integer(skip + 1).toString() + " to "
                + new Integer(skip + cursor.size()).toString() + ":");
        findPagging.displayCursor(cursor);
        if (cursor.size() == 10) {
            findPagging.pageResults(collection, skip + 10);
        }
    }

}