fr.cnes.sitools.datasource.mongodb.business.MongoDBExplorerRepresentation.java Source code

Introduction

Here is the source code for fr.cnes.sitools.datasource.mongodb.business.MongoDBExplorerRepresentation.java

Source

/*******************************************************************************
 * Copyright 2011 CNES - CENTRE NATIONAL d'ETUDES SPATIALES
 * 
 * This file is part of SITools2.
 * 
 * SITools2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * SITools2 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with SITools2.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package fr.cnes.sitools.datasource.mongodb.business;

import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

import org.restlet.data.MediaType;
import org.restlet.representation.OutputRepresentation;

import com.mongodb.BasicDBObject;
import com.mongodb.DBCursor;

import fr.cnes.sitools.datasource.mongodb.dbexplorer.MongoDBExplorerResource;

/**
 * Representation for simple MongoDB datasource exploring
 * 
 * @author b.fiorito (AKKA Technologies)
 */
public class MongoDBExplorerRepresentation extends OutputRepresentation {

    /** The mongoDB cursor **/
    private DBCursor cursor;

    /** DBExplorerResource for connection **/
    private MongoDBExplorerResource mongoDbResource;

    /**
     * Constructor
     * 
     * @param mediaType
     *          the mediaType
     * @param cursor
     *          the mongo cursor
     * @param res
     *          the resource for pooled conenction
     */
    public MongoDBExplorerRepresentation(MediaType mediaType, DBCursor cursor, MongoDBExplorerResource res) {
        super(MediaType.APPLICATION_JSON);
        this.cursor = cursor;
        this.mongoDbResource = res;

    }

    @Override
    public void write(OutputStream outputStream) throws IOException {
        PrintStream out = new PrintStream(outputStream);
        out.println("{\"success\": true,");
        out.println("\"total\":" + cursor.count() + ",");

        out.println("\"data\":[");
        boolean first = true;
        while (cursor.hasNext()) {
            if (!first) {
                out.println(",");
            } else {
                first = false;
            }
            BasicDBObject record = (BasicDBObject) cursor.next();
            out.print(record.toString());
            out.flush();
        }

        out.println("],");

        out.println("\"count\":" + cursor.size() + ",");
        out.println("\"offset\":" + mongoDbResource.getStart());
        out.println("}");
        out.close();
    }
}