Example usage for org.json JSONWriter JSONWriter

Introduction

In this page you can find the example usage for org.json JSONWriter JSONWriter.

Prototype

public JSONWriter(Writer w) 

Source Link

Document

Make a fresh JSONWriter.

Usage

From source file:uk.ac.horizon.ug.mrcreator.http.CRUDServlet.java

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    try {//  w  w w  .  java2 s.  com
        // TODO move to static method and reuse
        logger.log(Level.INFO, "doGet(" + req.getPathInfo() + ")");
        String pathParts[] = getPathParts(req);
        if (pathParts.length < discardPathParts) {
            throw new RequestException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Not enough part in path ("
                    + pathParts.length + " vs " + discardPathParts + ") for " + req.getPathInfo());
        }
        if (pathParts.length == discardPathParts) {
            // get all
            doList(req, resp);
            return;
        }
        // possible filtered query...
        String id = pathParts[discardPathParts];
        Key key = idToKey(id);
        if (key == null) {
            throw new RequestException(HttpServletResponse.SC_NOT_FOUND,
                    getObjectClass().getSimpleName() + " " + id + " could not map to key");
        }
        if (pathParts.length > discardPathParts + 1) {
            String childScope = pathParts[discardPathParts + 1];
            CRUDServlet childScopeServlet = getChildScopeServlet(id, childScope);
            childScopeServlet.doGet(req, resp);
            return;
        }
        EntityManager em = EMF.get().createEntityManager();
        try {
            Class clazz = getObjectClass();
            Object obj = em.find(clazz, key);
            if (obj == null) {
                throw new RequestException(HttpServletResponse.SC_NOT_FOUND,
                        getObjectClass().getSimpleName() + " " + id + " not found");
            }
            if (filterByCreator) {
                String creator = getCreator(obj);
                String requestCreator = getRequestCreator(req);
                if (!requestCreator.equals(creator))
                    throw new RequestException(HttpServletResponse.SC_UNAUTHORIZED,
                            "Requestor is not creator of " + getObjectClass().getSimpleName() + " " + id);
            }
            resp.setCharacterEncoding(ENCODING);
            resp.setContentType(JSON_MIME_TYPE);
            Writer w = new OutputStreamWriter(resp.getOutputStream(), ENCODING);
            JSONWriter jw = new JSONWriter(w);
            writeObject(jw, obj);
            w.close();
        } catch (RequestException re) {
            throw re;
        } catch (Exception e) {
            logger.log(Level.WARNING, "Getting object " + id + " of type " + getObjectClass(), e);
            throw new RequestException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
        } finally {
            em.close();
        }
    } catch (RequestException re) {
        resp.sendError(re.getErrorCode(), re.getMessage());
        return;
    }
}

---

From source file:uk.ac.horizon.ug.mrcreator.http.CRUDServlet.java

private void doList(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    List results = null;//ww w .j a v a  2s  .  com
    EntityManager em = EMF.get().createEntityManager();
    try {
        Class clazz = getObjectClass();
        Query q = null;
        if (!filterByCreator) {
            if (listFilterPropertyName == null) {
                q = em.createQuery("SELECT x FROM " + clazz.getSimpleName() + " x");
            } else {
                q = em.createQuery("SELECT x FROM " + clazz.getSimpleName() + " x WHERE x."
                        + listFilterPropertyName + " = :" + listFilterPropertyName);
                q.setParameter(listFilterPropertyName, listFilterPropertyValue);
            }
        } else {
            // filter
            String creator = getRequestCreator(req);
            String prop = getCreatorPropertyName();
            if (listFilterPropertyName == null) {
                q = em.createQuery(
                        "SELECT x FROM " + clazz.getSimpleName() + " x WHERE x." + prop + " = :creator");
                q.setParameter("creator", creator);
            } else {
                q = em.createQuery(
                        "SELECT x FROM " + clazz.getSimpleName() + " x WHERE x." + listFilterPropertyName
                                + " = :" + listFilterPropertyName + " AND x." + prop + " = :creator");
                q.setParameter(listFilterPropertyName, listFilterPropertyValue);
                q.setParameter("creator", creator);
            }
        }
        // TODO order?
        results = q.getResultList();
        // warning: lazy
        resp.setCharacterEncoding(ENCODING);
        resp.setContentType(JSON_MIME_TYPE);
        Writer w = new OutputStreamWriter(resp.getOutputStream(), ENCODING);
        JSONWriter jw = new JSONWriter(w);
        jw.array();
        for (Object o : results) {
            listObject(jw, o);
        }
        jw.endArray();
        w.close();
    } catch (Exception e) {
        logger.log(Level.WARNING, "Getting object of type " + getObjectClass(), e);
        resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
        return;
    } finally {
        em.close();
    }
}

---

From source file:uk.ac.horizon.ug.mrcreator.http.CRUDServlet.java

/** Create on POST.
 * E.g. curl -d '{...}' http://localhost:8888/author/configuration/
 * @param req/*from  w  w  w .  j a  v a  2 s.c  o  m*/
 * @param resp
 * @throws ServletException
 * @throws IOException
 */
private void doCreate(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    // TODO Auto-generated method stub
    try {
        Object o = parseObject(req);
        if (filterByCreator) {
            String creator = getRequestCreator(req);
            setCreator(o, creator);
        }
        Key key = validateCreate(o);
        // try adding
        EntityManager em = EMF.get().createEntityManager();
        EntityTransaction et = em.getTransaction();
        try {
            et.begin();
            if (em.find(getObjectClass(), key) != null)
                throw new RequestException(HttpServletResponse.SC_CONFLICT,
                        "object already exists (" + key + ")");
            em.persist(o);
            et.commit();
            logger.info("Added " + o);
        } finally {
            if (et.isActive())
                et.rollback();
            em.close();
        }
        resp.setCharacterEncoding(ENCODING);
        resp.setContentType(JSON_MIME_TYPE);
        Writer w = new OutputStreamWriter(resp.getOutputStream(), ENCODING);
        JSONWriter jw = new JSONWriter(w);
        listObject(jw, o);
        w.close();
    } catch (RequestException e) {
        resp.sendError(e.getErrorCode(), e.getMessage());
    } catch (Exception e) {
        logger.log(Level.WARNING, "Getting object of type " + getObjectClass(), e);
        resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
        return;
    }
}

---

From source file:uk.ac.horizon.ug.mrcreator.http.CRUDServlet.java

@Override
protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    // TODO Auto-generated method stub
    //logger.log(Level.INFO, "doPost("+req.getContextPath()+")");
    try {/*  w w  w .  ja  v  a  2s  .c  o m*/
        // get ID
        logger.log(Level.INFO, "doPut(" + req.getPathInfo() + ")");
        String pathParts[] = getPathParts(req);
        if (pathParts.length < discardPathParts) {
            throw new RequestException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Not enough part in path ("
                    + pathParts.length + " vs " + discardPathParts + ") for " + req.getPathInfo());
        }
        if (pathParts.length == discardPathParts) {
            throw new RequestException(HttpServletResponse.SC_BAD_REQUEST,
                    "Cannot PUT to collection " + req.getPathInfo());
        }
        // possible filtered query...
        String id = pathParts[discardPathParts];
        Key key = idToKey(id);
        if (key == null) {
            throw new RequestException(HttpServletResponse.SC_NOT_FOUND,
                    getObjectClass().getSimpleName() + " " + id + " could not map to key");
        }
        if (pathParts.length > discardPathParts + 1) {
            String childScope = pathParts[discardPathParts + 1];
            CRUDServlet childScopeServlet = getChildScopeServlet(id, childScope);
            childScopeServlet.doPut(req, resp);
            return;
        }
        // parse new value
        Object newobj = parseObject(req);

        EntityManager em = EMF.get().createEntityManager();
        try {
            // check that object exists
            Class clazz = getObjectClass();
            Object obj = em.find(clazz, key);
            if (obj == null) {
                throw new RequestException(HttpServletResponse.SC_NOT_FOUND,
                        getObjectClass().getSimpleName() + " " + id + " not found");
            }
            // check (if required) that object is owned by requestor
            if (filterByCreator) {
                String creator = getCreator(obj);
                String requestCreator = getRequestCreator(req);
                if (!requestCreator.equals(creator))
                    throw new RequestException(HttpServletResponse.SC_UNAUTHORIZED,
                            "Requestor is not creator of " + getObjectClass().getSimpleName() + " " + id);
                // set creator
                setCreator(newobj, creator);
            }
            // validate update
            validateUpdate(newobj, obj);
            // perform update
            em.merge(newobj);

            resp.setCharacterEncoding(ENCODING);
            resp.setContentType(JSON_MIME_TYPE);
            Writer w = new OutputStreamWriter(resp.getOutputStream(), ENCODING);
            JSONWriter jw = new JSONWriter(w);
            writeObject(jw, newobj);
            w.close();
        } catch (RequestException re) {
            throw re;
        } catch (Exception e) {
            logger.log(Level.WARNING, "Updating object " + id + " of type " + getObjectClass(), e);
            throw new RequestException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
        } finally {
            em.close();
        }
    } catch (RequestException re) {
        resp.sendError(re.getErrorCode(), re.getMessage());
        return;
    }
}

---

From source file:uk.ac.horizon.ug.mrcreator.http.CRUDServlet.java

@Override
protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    try {/*  w  w w  .  ja  va2 s .  c o  m*/
        // get ID
        logger.log(Level.INFO, "doDelete(" + req.getPathInfo() + ")");
        String pathParts[] = getPathParts(req);
        if (pathParts.length < discardPathParts) {
            throw new RequestException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Not enough part in path ("
                    + pathParts.length + " vs " + discardPathParts + ") for " + req.getPathInfo());
        }
        if (pathParts.length == discardPathParts) {
            throw new RequestException(HttpServletResponse.SC_BAD_REQUEST,
                    "Cannot PUT to collection " + req.getPathInfo());
        }
        // possible filtered query...
        String id = pathParts[discardPathParts];
        Key key = idToKey(id);
        if (key == null) {
            throw new RequestException(HttpServletResponse.SC_NOT_FOUND,
                    getObjectClass().getSimpleName() + " " + id + " could not map to key");
        }
        if (pathParts.length > discardPathParts + 1) {
            String childScope = pathParts[discardPathParts + 1];
            CRUDServlet childScopeServlet = getChildScopeServlet(id, childScope);
            childScopeServlet.doDelete(req, resp);
            return;
        }

        EntityManager em = EMF.get().createEntityManager();
        try {
            // check that object exists
            Class clazz = getObjectClass();
            Object obj = em.find(clazz, key);
            if (obj == null) {
                throw new RequestException(HttpServletResponse.SC_NOT_FOUND,
                        getObjectClass().getSimpleName() + " " + id + " not found");
            }
            // check (if required) that object is owned by requestor
            if (filterByCreator) {
                String creator = getCreator(obj);
                String requestCreator = getRequestCreator(req);
                if (!requestCreator.equals(creator))
                    throw new RequestException(HttpServletResponse.SC_UNAUTHORIZED,
                            "Requestor is not creator of " + getObjectClass().getSimpleName() + " " + id);
            }
            // validate delete
            validateDelete(obj);
            // perform update
            em.remove(obj);

            // write back old value?
            resp.setCharacterEncoding(ENCODING);
            resp.setContentType(JSON_MIME_TYPE);
            Writer w = new OutputStreamWriter(resp.getOutputStream(), ENCODING);
            JSONWriter jw = new JSONWriter(w);
            writeObject(jw, obj);
            w.close();
        } catch (RequestException re) {
            throw re;
        } catch (Exception e) {
            logger.log(Level.WARNING, "Deleting object " + id + " of type " + getObjectClass(), e);
            throw new RequestException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.toString());
        } finally {
            em.close();
        }
    } catch (RequestException re) {
        resp.sendError(re.getErrorCode(), re.getMessage());
        return;
    }
}

---

From source file:com.kise.kairosdb.core.groupby.FiscalCalendarGroubBy.java

@Override
public GroupByResult getGroupByResult(int id) {
    return new GroupByResult() {
        @Override/* w  ww .  j a  va  2  s.c  o  m*/
        public String toJson() throws FormatterException {
            StringWriter stringWriter = new StringWriter();
            try {
                JSONWriter writer = new JSONWriter(stringWriter);
                FiscalPeriod p = periods.get(id);
                writer.object();
                writer.key("name").value("fiscal_period");
                writer.key("group").object();
                writer.key("name").value("FY" + p.getFiscalYear() + "-P" + p.getFiscalPeriod());
                writer.key("fiscal_year").value(p.getFiscalYear());
                writer.key("quarter").value("Q" + p.getQuarter());
                writer.key("fiscal_period").value(p.getFiscalPeriod());
                writer.endObject();
                writer.endObject();
            } catch (JSONException e) {
                throw new FormatterException(e);
            }

            return stringWriter.toString();
        }
    };
}

---

From source file:com.vaynberg.wicket.select2.AbstractSelect2Choice.java

@Override
public void onResourceRequested() {

    // this is the callback that retrieves matching choices used to populate the dropdown

    Request request = getRequestCycle().getRequest();
    IRequestParameters params = request.getRequestParameters();

    // retrieve choices matching the search term

    String term = params.getParameterValue("term").toOptionalString();

    int page = params.getParameterValue("page").toInt(1);
    // select2 uses 1-based paging, but in wicket world we are used to
    // 0-based//from www .j a v  a 2s. c o m
    page -= 1;

    Response<T> response = new Response<T>();
    provider.query(term, page, response);

    // jsonize and write out the choices to the response

    WebResponse webResponse = (WebResponse) getRequestCycle().getResponse();
    webResponse.setContentType("application/json");

    OutputStreamWriter out = new OutputStreamWriter(webResponse.getOutputStream(), getRequest().getCharset());
    JSONWriter json = new JSONWriter(out);

    try {
        json.object();
        json.key("results").array();
        for (T item : response) {
            json.object();
            provider.toJson(item, json);
            json.endObject();
        }
        json.endArray();
        json.key("more").value(response.getHasMore()).endObject();
    } catch (JSONException e) {
        throw new RuntimeException("Could not write Json response", e);
    }

    try {
        out.flush();
    } catch (IOException e) {
        throw new RuntimeException("Could not write Json to servlet response", e);
    }
}

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