001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.xml.xml2json.handler;
029
030import org.opencms.json.JSONObject;
031import org.opencms.main.CmsLog;
032import org.opencms.xml.xml2json.CmsJsonRequest;
033import org.opencms.xml.xml2json.CmsJsonResult;
034import org.opencms.xml.xml2json.document.CmsJsonDocumentResource;
035
036import javax.servlet.http.HttpServletResponse;
037
038import org.apache.commons.logging.Log;
039
040/**
041 * JSON handler for rendering a resource as JSON.
042 */
043public class CmsJsonHandlerResource implements I_CmsJsonHandler {
044
045    /** Logger instance for this class. */
046    private static final Log LOG = CmsLog.getLog(CmsJsonHandlerResource.class);
047
048    /**
049     * @see org.opencms.xml.xml2json.handler.I_CmsJsonHandler#getOrder()
050     */
051    public double getOrder() {
052
053        return 600;
054    }
055
056    /**
057     * @see org.opencms.xml.xml2json.handler.I_CmsJsonHandler#matches(org.opencms.xml.xml2json.handler.CmsJsonHandlerContext)
058     */
059    public boolean matches(CmsJsonHandlerContext context) {
060
061        return true;
062    }
063
064    /**
065     * @see org.opencms.xml.xml2json.handler.I_CmsJsonHandler#renderJson(org.opencms.xml.xml2json.handler.CmsJsonHandlerContext)
066     */
067    public CmsJsonResult renderJson(CmsJsonHandlerContext context) {
068
069        try {
070            CmsJsonRequest jsonRequest = new CmsJsonRequest(context, this);
071            jsonRequest.validate();
072            if (jsonRequest.hasErrors()) {
073                return new CmsJsonResult(jsonRequest.getErrorsAsJson(), HttpServletResponse.SC_BAD_REQUEST);
074            }
075            CmsJsonDocumentResource jsonDocument = new CmsJsonDocumentResource(jsonRequest, context.getResource());
076            return new CmsJsonResult(jsonDocument.getJson(), HttpServletResponse.SC_OK);
077        } catch (Exception e) {
078            LOG.error(e.getLocalizedMessage(), e);
079            return new CmsJsonResult(
080                JSONObject.quote(e.getLocalizedMessage()),
081                HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
082        }
083    }
084
085}