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.file.CmsResource;
031import org.opencms.file.CmsVfsResourceNotFoundException;
032import org.opencms.main.CmsLog;
033import org.opencms.util.CmsStringUtil;
034import org.opencms.xml.xml2json.CmsJsonRequest;
035import org.opencms.xml.xml2json.CmsJsonResult;
036import org.opencms.xml.xml2json.document.CmsJsonDocumentFolder;
037
038import javax.servlet.http.HttpServletResponse;
039
040import org.apache.commons.logging.Log;
041
042/**
043 * Produces directory listings in JSON format.
044 */
045public class CmsJsonHandlerFolder implements I_CmsJsonHandler {
046
047    /** Logger instance for this class. */
048    private static final Log LOG = CmsLog.getLog(CmsJsonHandlerFolder.class);
049
050    /**
051     * @see org.opencms.xml.xml2json.handler.I_CmsJsonHandler#getOrder()
052     */
053    public double getOrder() {
054
055        return 200;
056    }
057
058    /**
059     * @see org.opencms.xml.xml2json.handler.I_CmsJsonHandler#matches(org.opencms.xml.xml2json.handler.CmsJsonHandlerContext)
060     */
061    public boolean matches(CmsJsonHandlerContext context) {
062
063        return (context.getResource() != null) && context.getResource().isFolder();
064    }
065
066    /**
067     * @see org.opencms.xml.xml2json.handler.I_CmsJsonHandler#renderJson(org.opencms.xml.xml2json.handler.CmsJsonHandlerContext)
068     */
069    public CmsJsonResult renderJson(CmsJsonHandlerContext context) {
070
071        try {
072            try {
073                CmsResource indexJson = context.getRootCms().readResource(
074                    CmsStringUtil.joinPaths(context.getPath(), "index.json"));
075
076                return new CmsJsonResult(indexJson);
077
078            } catch (CmsVfsResourceNotFoundException e) {
079                CmsJsonRequest jsonRequest = new CmsJsonRequest(context, this);
080                jsonRequest.validate();
081                if (jsonRequest.hasErrors()) {
082                    return new CmsJsonResult(jsonRequest.getErrorsAsJson(), HttpServletResponse.SC_BAD_REQUEST);
083                }
084                CmsJsonDocumentFolder jsonDocument = new CmsJsonDocumentFolder(jsonRequest);
085                return new CmsJsonResult(jsonDocument.getJson(), HttpServletResponse.SC_OK);
086            }
087        } catch (Exception e) {
088            LOG.error(e.getLocalizedMessage(), e);
089            return new CmsJsonResult(e.getLocalizedMessage(), HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
090        }
091    }
092}