Example usage for com.mongodb DBCursor hasNext

Introduction

In this page you can find the example usage for com.mongodb DBCursor hasNext.

Prototype

@Override
public boolean hasNext() 

Source Link

Document

Checks if there is another object available.

Usage

From source file:com.cyslab.craftvm.rest.mongo.QueryServlet.java

License:GNU General Public License

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

    log.trace("doPost()");

    // server auth
    if (!can_read(req)) {
        res.sendError(SC_UNAUTHORIZED);//  www .  j  a v a2  s  .c o m
        return;
    }

    String ret = null;

    InputStream is = req.getInputStream();
    String db_name = req.getParameter("dbname");
    String col_name = req.getParameter("colname");
    if (db_name == null || col_name == null) {
        String names[] = req2mongonames(req);
        if (names != null) {
            db_name = names[0];
            col_name = names[1];
        }
        if (db_name == null || col_name == null) {
            error(res, SC_BAD_REQUEST, Status.get("param name missing"));
            return;
        }
    }
    String skip = req.getParameter("skip");
    String limit = req.getParameter("limit");

    String _fields = req.getParameter("fields");
    String fields[] = null;
    if (_fields != null)
        fields = _fields.split("[,]");

    DB db = mongo.getDB(db_name);

    // mongo auth
    String user = req.getParameter("user");
    String passwd = req.getParameter("passwd");
    if (user != null && passwd != null && (!db.isAuthenticated())) {
        boolean auth = db.authenticate(user, passwd.toCharArray());
        if (!auth) {
            res.sendError(SC_UNAUTHORIZED);
            return;
        }
    }

    DBCollection col = db.getCollection(col_name);

    StringBuilder buf = tl.get();
    // reset buf
    buf.setLength(0);

    BufferedReader r = null;
    DBObject q = null, sort = null;

    try {

        r = new BufferedReader(new InputStreamReader(is));
        String data = r.readLine();
        if (data == null) {
            error(res, SC_BAD_REQUEST, Status.get("no data"));
            return;
        }
        try {
            q = (DBObject) JSON.parse(data);
            if (cache != null) {
                buf.append(db_name);
                buf.append(col_name);
                buf.append(data);
            }
        } catch (JSONParseException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse data"));
            return;
        }
        // sort param
        data = r.readLine();
        if (data != null) {
            try {
                sort = (DBObject) JSON.parse(data);
            } catch (JSONParseException e) {
                error(res, SC_BAD_REQUEST, Status.get("can not parse sort arg"));
                return;
            }
            if (cache != null)
                buf.append(data);
        }

    } finally {
        if (r != null)
            r.close();
    }

    // limit
    int lim;
    if (limit != null) {
        try {
            lim = Math.min(Integer.parseInt(limit), MAX_FIELDS_TO_RETURN);
        } catch (NumberFormatException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse limit"));
            return;
        }
    } else {
        lim = MAX_FIELDS_TO_RETURN;
    }
    if (cache != null) {
        buf.append(";limit=");
        buf.append(lim);
    }

    // skip
    int sk = -1;
    if (skip != null) {
        try {
            sk = Integer.parseInt(skip);
            if (cache != null) {
                buf.append(";skip=");
                buf.append(sk);
            }
        } catch (NumberFormatException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse skip"));
            return;
        }
    }

    // fields
    if (cache != null && _fields != null) {
        buf.append(";fields=");
        buf.append(_fields);
    }

    // from cache
    String cache_key = null;
    if (cache != null) {
        cache_key = buf.toString();
        try {
            ret = (String) cache.get(cache_key);
        }
        // some wrong char in key
        catch (IllegalArgumentException e) {
            int l = buf.length();
            for (int i = 0; i < l; i++) {
                if (buf.charAt(i) == ' ')
                    buf.setCharAt(i, '*');
            }
            cache_key = buf.toString();
            ret = (String) cache.get(cache_key);
        }
        if (ret != null) {
            out_str(req, ret, "application/json");
            return;
        }
    }

    // cursor
    DBCursor c;
    if (fields != null) {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        int len = fields.length;
        for (int i = 0; i < len; i++) {
            String s = fields[i];
            sb.append('"');
            sb.append(s);
            sb.append('"');
            sb.append(":1");
            if (i != (len - 1))
                sb.append(",");
        }
        sb.append("}");
        c = col.find(q, (DBObject) JSON.parse(sb.toString()));
    } else
        c = col.find(q);

    if (c == null || c.count() == 0) {
        error(res, SC_NOT_FOUND, Status.get("no documents found"));
        return;
    }

    if (sort != null)
        c.sort(sort);

    res.setIntHeader("X-Documents-Count", c.count());

    c.limit(lim);
    if (sk != -1)
        c.skip(sk);

    // reset buf
    buf.setLength(0);

    int no = 0;
    buf.append("[");
    while (c.hasNext()) {

        DBObject o = c.next();
        if (rm_id)
            o.removeField("_id");
        JSON.serialize(o, buf);
        buf.append(",");
        no++;

    }
    c.close();

    if (no > 0)
        buf.setCharAt(buf.length() - 1, ']');
    else
        buf.append(']');

    res.setIntHeader("X-Documents-Returned", no);

    ret = buf.toString();
    if (cache != null)
        cache.set(cache_key, ret);

    out_str(req, ret, "application/json");

}

---

From source file:com.cyslab.craftvm.rest.mongo.QueryServlet.java

License:GNU General Public License

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

    log.trace("doGet()");

    if (!can_read(req)) {
        res.sendError(SC_UNAUTHORIZED);//from w w w . j av  a2s.com
        return;
    }

    String db_name = req.getParameter("dbname");
    String col_name = req.getParameter("colname");
    if (db_name == null || col_name == null) {
        String names[] = req2mongonames(req);
        if (names != null) {
            db_name = names[0];
            col_name = names[1];
        }
        if (db_name == null || col_name == null) {
            error(res, SC_BAD_REQUEST, Status.get("param name missing"));
            return;
        }
    }
    String skip = req.getParameter("skip");
    String limit = req.getParameter("limit");

    DB db = mongo.getDB(db_name);

    // mongo auth
    String user = req.getParameter("user");
    String passwd = req.getParameter("passwd");
    if (user != null && passwd != null && (!db.isAuthenticated())) {
        boolean auth = db.authenticate(user, passwd.toCharArray());
        if (!auth) {
            res.sendError(SC_UNAUTHORIZED);
            return;
        }
    }

    DBCollection col = db.getCollection(col_name);

    DBCursor c = col.find();
    if (c == null || c.count() == 0) {
        error(res, SC_NOT_FOUND, Status.get("no documents found"));
        return;
    }

    res.setIntHeader("X-Documents-Count", c.count());

    if (limit != null) {
        try {
            c.limit(Math.min(Integer.parseInt(limit), MAX_FIELDS_TO_RETURN));
        } catch (NumberFormatException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse limit"));
            c.close();
            return;
        }
    } else
        c.limit(MAX_FIELDS_TO_RETURN);

    if (skip != null) {
        try {
            c.skip(Integer.parseInt(skip));
        } catch (NumberFormatException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse skip"));
            c.close();
            return;
        }
    }

    StringBuilder buf = tl.get();
    buf.setLength(0);

    int no = 0;
    buf.append("[");
    while (c.hasNext()) {

        DBObject o = c.next();
        if (rm_id)
            o.removeField("_id");
        JSON.serialize(o, buf);
        buf.append(",");
        no++;

    }
    c.close();

    if (no > 0)
        buf.setCharAt(buf.length() - 1, ']');
    else
        buf.append(']');

    res.setIntHeader("X-Documents-Returned", no);

    out_str(req, buf.toString(), "application/json");

}

---

From source file:com.cyslab.craftvm.rest.mongo.WriteServlet.java

License:GNU General Public License

@Override
protected void doDelete(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

    log.trace("doDelete()");

    if (!can_write(req)) {
        res.sendError(SC_UNAUTHORIZED);//from  w ww  .j a v a  2s  .co  m
        return;
    }

    InputStream is = req.getInputStream();
    String db_name = req.getParameter("dbname");
    String col_name = req.getParameter("colname");
    if (db_name == null || col_name == null) {
        String names[] = req2mongonames(req);
        if (names != null) {
            db_name = names[0];
            col_name = names[1];
        }
        if (db_name == null || col_name == null) {
            error(res, SC_BAD_REQUEST, Status.get("param name missing"));
            return;
        }
    }

    DB db = mongo.getDB(db_name);

    // mongo auth
    String user = req.getParameter("user");
    String passwd = req.getParameter("passwd");
    if (user != null && passwd != null && (!db.isAuthenticated())) {
        boolean auth = db.authenticate(user, passwd.toCharArray());
        if (!auth) {
            res.sendError(SC_UNAUTHORIZED);
            return;
        }
    }

    DBCollection col = db.getCollection(col_name);

    BufferedReader r = null;
    DBObject q = null;
    try {

        r = new BufferedReader(new InputStreamReader(is));
        String data = r.readLine();
        if (data == null) {
            error(res, SC_BAD_REQUEST, Status.get("no data"));
            return;
        }
        try {
            q = (DBObject) JSON.parse(data);
        } catch (JSONParseException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse data"));
            return;
        }

    } finally {
        if (r != null)
            r.close();
    }

    // search
    if (do_search) {

        DBCursor c = col.find(q);
        long l = c.count();
        String todelete[] = new String[(int) l];
        int n = 0;

        while (c.hasNext()) {

            DBObject o = c.next();
            ObjectId oid = (ObjectId) o.get("_id");
            String id = oid.toStringMongod();
            todelete[n++] = id;

        }
        c.close();
        search.get_writer().delete(todelete);

    }

    WriteResult wr = col.remove(q, write_concern);

    // return operation status
    if (do_return) {
        out_str(req, wr.toString());
        if (wr.getError() == null) {
            res.setStatus(SC_BAD_REQUEST);
            return;
        }
    }

    res.setStatus(SC_OK);

}

---

From source file:com.cyslab.craftvm.rest.mongo.WriteServlet.java

License:GNU General Public License

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

    log.trace("doPost()");

    if (!can_write(req)) {
        res.sendError(SC_UNAUTHORIZED);//from   w  ww.  ja  va2  s. c  o  m
        return;
    }

    InputStream is = req.getInputStream();
    String db_name = req.getParameter("dbname");
    String col_name = req.getParameter("colname");
    if (db_name == null || col_name == null) {
        String names[] = req2mongonames(req);
        if (names != null) {
            db_name = names[0];
            col_name = names[1];
        }
        if (db_name == null || col_name == null) {
            error(res, SC_BAD_REQUEST, Status.get("param name missing"));
            return;
        }
    }

    boolean upsert = Boolean.parseBoolean(req.getParameter("upsert"));
    boolean multi = Boolean.parseBoolean(req.getParameter("multi"));

    DB db = mongo.getDB(db_name);

    // mongo auth
    String user = req.getParameter("user");
    String passwd = req.getParameter("passwd");
    if (user != null && passwd != null && (!db.isAuthenticated())) {
        boolean auth = db.authenticate(user, passwd.toCharArray());
        if (!auth) {
            res.sendError(SC_UNAUTHORIZED);
            return;
        }
    }

    DBCollection col = db.getCollection(col_name);

    BufferedReader r = null;
    DBObject q = null, o = null;
    try {

        r = new BufferedReader(new InputStreamReader(is));
        String q_s = r.readLine();
        if (q_s == null) {
            error(res, SC_BAD_REQUEST, Status.get("no data"));
            return;
        }
        String o_s = r.readLine();
        if (o_s == null) {
            error(res, SC_BAD_REQUEST, Status.get("obj to update missing"));
            return;
        }
        try {
            q = (DBObject) JSON.parse(q_s);
            o = (DBObject) JSON.parse(o_s);
        } catch (JSONParseException e) {
            error(res, SC_BAD_REQUEST, Status.get("can not parse data"));
            return;
        }

    } finally {
        if (r != null)
            r.close();
    }
    //
    // search
    if (do_search) {

        String fn = col.getFullName();
        DBCursor c = col.find(q);
        int cnt = c.count();
        if (!multi)
            c.limit(1);
        long l = multi ? cnt : 1;
        String toupdate[] = new String[(int) l];
        int n = 0;
        boolean insert = false;

        if (upsert && !multi && cnt == 0)
            insert = true;

        while (c.hasNext()) {

            DBObject _o = c.next();
            ObjectId oid = (ObjectId) _o.get("_id");
            String id = oid.toStringMongod();
            toupdate[n++] = id;

        }
        c.close();

        List<String> flds = Config.search_index_fields.get(fn);
        boolean commit = false;
        Document doc = null;
        Search _writer = search.get_writer();
        if (flds != null && flds.size() > 0) {
            doc = new Document();
            try {
                for (String fld : flds) {
                    String val = (String) o.get(fld);
                    if (val == null)
                        continue;
                    _writer.add_searchable_s(doc, fld, val);
                    commit = true;
                }
                if (commit)
                    _writer.commit(doc);
            } catch (ClassCastException e) {
                error(res, SC_BAD_REQUEST, Status.get("searchable fields must be type String"));
                return;
            } catch (CorruptIndexException e) {
                error(res, SC_BAD_REQUEST, Status.get("Search corrupt index" + e));
                return;
            }
        }
        if (commit && insert)
            log.warn("upsert with search not implemented yet");
        else
            _writer.update(toupdate, doc);

    }

    WriteResult wr = col.update(q, o, upsert, multi, write_concern);

    // return operation status
    if (do_return) {
        out_str(req, wr.toString());
        if (wr.getError() == null) {
            res.setStatus(SC_BAD_REQUEST);
            return;
        }
    }

    res.setStatus(SC_CREATED);

}

---

From source file:com.damanzano.mongohw2_2.MongoHW2_2.java

public static void main(String[] args) throws UnknownHostException {
    MongoClient client = new MongoClient();
    DB db = client.getDB("students");
    DBCollection collection = db.getCollection("grades");

    DBCursor allGrades = collection.find(new BasicDBObject("type", "homework"))
            .sort(new BasicDBObject("student_id", 1).append("score", 1));
    try {// ww w.  ja  va  2s. com
        String studentId = "";
        while (allGrades.hasNext()) {
            DBObject grade = allGrades.next();
            System.out.println(grade);
            if (!studentId.equalsIgnoreCase(((Integer) grade.get("student_id")).toString())) {
                System.out.println("Deleting grade " + grade.get("_id").toString() + " for student "
                        + grade.get("student_id").toString());
                collection.remove(grade);
            }
            studentId = ((Integer) grade.get("student_id")).toString();
        }
    } finally {
        allGrades.close();
    }
}

---

From source file:com.daprota.m2.manager.MongoManager.java

License:Apache License

/**
 * Retrieves user via spceified userName.
 *
 * @param userName A user's userName.//from w  ww. j a  v  a2 s . c  o m
* @return user if exists. Otherwise returns null.
 */
public User findUserByUserName(String userName) throws MongoException {
    DBCursor dbCur = null;

    try {
        // get a user collection
        DBCollection coll = _db.getCollection("user");
        DBObject query = new BasicDBObject("userName", userName);
        dbCur = coll.find(query);
        boolean hasNext;
        try {
            logger.debug("Call dbCur.hasNext().");
            hasNext = dbCur.hasNext();
        } catch (MongoException ex) {
            logger.error("Search for user {} failed.\n" + ex.toString(), userName);
            throw new MongoException("Search for user " + userName + " failed.");
        }
        if (hasNext) {
            DBObject user = dbCur.next();
            ArrayList<BasicDBObject> roles = (ArrayList<BasicDBObject>) user.get("roles");
            ArrayList<Role> roles2 = new ArrayList<Role>();
            if (roles != null) {
                for (BasicDBObject role : roles) {
                    Role role3 = new Role(role.get("_id").toString(), (String) role.get("name"),
                            (String) role.get("description"));
                    roles2.add(role3);
                }
                logger.debug("User {} roles added.", userName);
            }
            return (new User(user.get("_id").toString(), (String) user.get("userName"),
                    (String) user.get("password"), roles2));
        } else {
            logger.warn("User {} could not be found", userName);
            return null;
        }
    } catch (MongoException ex) {
        logger.error("Search for user {} failed.\n" + ex.toString(), userName);
        throw new MongoException("Search for user " + userName + " failed.");
    } finally {
        dbCur.close();
    }
}

---

From source file:com.data.DAO.MetodoPagoDAO.java

public static ArrayList consultarRecibo(Integer idMetodoPago) {
    ArrayList reciboConsulta = new ArrayList();
    try {/*  w w w  . j  a  v  a2s.c o m*/
        // To connect to mongo dbserver
        MongoClient mongoClient = new MongoClient("localhost", 27017);

        // Now connect to your databases
        DB db = mongoClient.getDB("hoex");
        System.out.println("Connect to database successfully");

        // Use an especific collection
        DBCollection coll = db.getCollection("Metodo_pago");
        System.out.println("Collection Metodo_pago selected successfully");

        BasicDBObject whereQuery = new BasicDBObject();
        // Sentence to search one account number
        whereQuery.put("idMetodoPago", idMetodoPago);

        DBCursor cursor = coll.find(whereQuery);

        while (cursor.hasNext()) {
            DBObject consultDocument = cursor.next();
            reciboConsulta.add(consultDocument.get("descripcion"));
            reciboConsulta.add(consultDocument.get("cuotas"));
            reciboConsulta.add(consultDocument.get("precio"));
            reciboConsulta.add(consultDocument.get("idReserva"));
        }
        System.out.println("Document consulted successfully");
    } catch (Exception e) {
        System.err.println(e.getClass().getName() + ": " + e.getMessage());
    }
    if (!reciboConsulta.isEmpty()) {
        return reciboConsulta;
    } else {
        return null;
    }
}

---

From source file:com.data.DAO.MetodoPagoDAO.java

public static String actualizarRecibo(Integer idMetodoPago, String descripcion, Integer cuotas, float precio,
        Integer idReserva) {/*from ww w . j  a  v a 2  s .  c  o  m*/
    String reciboActualizar = null;
    try {
        // To connect to mongo dbserver
        MongoClient mongoClient = new MongoClient("localhost", 27017);

        // Now connect to your databases
        DB db = mongoClient.getDB("hoex");
        System.out.println("Connect to database successfully");

        DBCollection coll = db.getCollection("Metodo_pago");
        System.out.println("Collection Metodo_pago selected successfully");

        BasicDBObject whereQuery = new BasicDBObject();
        whereQuery.put("idMetodoPago", idMetodoPago);

        DBCursor cursor = coll.find(whereQuery);

        while (cursor.hasNext()) {
            DBObject updateDocument = cursor.next();
            updateDocument.put("descripcion", descripcion);
            updateDocument.put("cuotas", cuotas);
            updateDocument.put("precio", precio);
            updateDocument.put("idReserva", idReserva);
            coll.update(whereQuery, updateDocument);
        }
        System.out.println("Document updated successfully");
        reciboActualizar = "Success";
    } catch (Exception e) {
        System.err.println(e.getClass().getName() + ": " + e.getMessage());
    }
    if (reciboActualizar != null) {
        return "El recibo se ha actualizado correctamente!";
    } else {
        return "El recibo no se ha actualizado!";
    }
}

---

From source file:com.datatorrent.contrib.mongodb.MongoDBOutputOperator.java

License:Open Source License

/**
 * init last completed windowId information with operatorId, read from maxWindowTable.
 * If the table is empty, insert a default value document
 */// w w  w  .  ja v  a  2 s .  co m
public void initLastWindowInfo() {
    maxWindowCollection = db.getCollection(maxWindowTable);
    BasicDBObject query = new BasicDBObject();
    query.put(operatorIdColumnName, operatorId);
    //    query.put(applicationIdName, "0");
    DBCursor cursor = maxWindowCollection.find(query);
    if (cursor.hasNext()) {
        Object obj = cursor.next().get(windowIdColumnName);
        lastWindowId = (Long) obj;
    } else {
        BasicDBObject doc = new BasicDBObject();
        doc.put(windowIdColumnName, (long) 0);
        //      doc.put(applicationIdName, 0);
        doc.put(operatorIdColumnName, operatorId);
        maxWindowCollection.save(doc);
    }

    System.out.println("last windowid:" + lastWindowId);
}

---

From source file:com.dawsonsystems.session.MongoSessionManager.java

License:Apache License

public String[] keys() throws IOException {

    BasicDBObject restrict = new BasicDBObject();
    restrict.put("_id", 1);

    DBCursor cursor = getCollection().find(new BasicDBObject(), restrict);

    List<String> ret = new ArrayList<String>();

    while (cursor.hasNext()) {
        ret.add(cursor.next().get("").toString());
    }/*from  w  ww .j a  v a2 s .  c  o m*/

    return ret.toArray(new String[ret.size()]);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »