001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.documentlibrary.context;
016    
017    import com.liferay.portal.kernel.exception.PortalException;
018    import com.liferay.portal.kernel.exception.SystemException;
019    import com.liferay.portal.kernel.repository.model.FileVersion;
020    import com.liferay.registry.Registry;
021    import com.liferay.registry.RegistryUtil;
022    
023    import java.util.Collection;
024    
025    import javax.servlet.http.HttpServletRequest;
026    import javax.servlet.http.HttpServletResponse;
027    
028    /**
029     * @author Iv??n Zaera
030     */
031    public class DLViewFileVersionDisplayContextUtil {
032    
033            public static DLViewFileVersionDisplayContext
034                    getDLFileVersionActionsDisplayContext(
035                            HttpServletRequest request, HttpServletResponse response,
036                            FileVersion fileVersion)
037                    throws PortalException {
038    
039                    DLViewFileVersionDisplayContext dlViewFileVersionDisplayContext =
040                            new DefaultDLViewFileVersionDisplayContext(
041                                    request, response, fileVersion);
042    
043                    if (fileVersion != null) {
044                            dlViewFileVersionDisplayContext =
045                                    _chainDLFileVersionActionsDisplayContexts(
046                                            request, response, fileVersion,
047                                            dlViewFileVersionDisplayContext);
048                    }
049    
050                    return dlViewFileVersionDisplayContext;
051            }
052    
053            private static DLViewFileVersionDisplayContext
054                    _chainDLFileVersionActionsDisplayContexts(
055                            HttpServletRequest request, HttpServletResponse response,
056                            FileVersion fileVersion,
057                            DLViewFileVersionDisplayContext dlViewFileVersionDisplayContext) {
058    
059                    Collection<DLViewFileVersionDisplayContextFactory>
060                            dlFileVersionActionsDisplayContextFactories =
061                                    _getDLFileVersionActionsDisplayContextFactories();
062    
063                    for (DLViewFileVersionDisplayContextFactory
064                            dlViewFileVersionDisplayContextFactory :
065                                            dlFileVersionActionsDisplayContextFactories) {
066    
067                            dlViewFileVersionDisplayContext =
068                                    dlViewFileVersionDisplayContextFactory.
069                                            getDLFileVersionActionsDisplayContext(
070                                                    dlViewFileVersionDisplayContext, request, response,
071                                                    fileVersion);
072                    }
073    
074                    return dlViewFileVersionDisplayContext;
075            }
076    
077            private static Collection<DLViewFileVersionDisplayContextFactory>
078                    _getDLFileVersionActionsDisplayContextFactories() {
079    
080                    try {
081                            Registry registry = RegistryUtil.getRegistry();
082    
083                            return registry.getServices(
084                                    DLViewFileVersionDisplayContextFactory.class, null);
085                    }
086                    catch (Exception e) {
087                            throw new SystemException(e);
088                    }
089            }
090    
091    }