Java tutorial
/** * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more * details. */ package com.liferay.asset.publisher.web.util; import com.liferay.asset.kernel.AssetRendererFactoryRegistryUtil; import com.liferay.asset.kernel.model.AssetEntry; import com.liferay.asset.kernel.model.AssetRendererFactory; import com.liferay.asset.publisher.web.constants.AssetPublisherWebKeys; import com.liferay.asset.publisher.web.display.context.AssetEntryResult; import com.liferay.asset.publisher.web.display.context.AssetPublisherDisplayContext; import com.liferay.petra.string.StringPool; import com.liferay.portal.kernel.dao.search.SearchContainer; import com.liferay.portal.kernel.language.LanguageUtil; import com.liferay.portal.kernel.model.Layout; import com.liferay.portal.kernel.theme.PortletDisplay; import com.liferay.portal.kernel.theme.ThemeDisplay; import com.liferay.portal.kernel.util.GetterUtil; import com.liferay.portal.kernel.util.Http; import com.liferay.portal.kernel.util.Portal; import com.liferay.portal.kernel.util.PortalUtil; import com.liferay.portal.kernel.util.StringBundler; import com.liferay.portal.kernel.util.Validator; import com.liferay.portal.kernel.util.WebKeys; import com.liferay.rss.util.RSSUtil; import com.sun.syndication.feed.synd.SyndContent; import com.sun.syndication.feed.synd.SyndContentImpl; import com.sun.syndication.feed.synd.SyndEntry; import com.sun.syndication.feed.synd.SyndEntryImpl; import com.sun.syndication.feed.synd.SyndFeed; import com.sun.syndication.feed.synd.SyndFeedImpl; import com.sun.syndication.feed.synd.SyndLink; import com.sun.syndication.feed.synd.SyndLinkImpl; import java.util.ArrayList; import java.util.Date; import java.util.List; import javax.portlet.PortletPreferences; import javax.portlet.PortletRequest; import javax.portlet.PortletResponse; import javax.portlet.ResourceRequest; import javax.portlet.ResourceResponse; /** * @author Brian Wing Shun Chan * @author Julio Camarero */ public class AssetRSSUtil { public static byte[] getRSS(ResourceRequest portletRequest, ResourceResponse portletResponse) throws Exception { PortletPreferences portletPreferences = portletRequest.getPreferences(); String selectionStyle = portletPreferences.getValue("selectionStyle", "dynamic"); if (!selectionStyle.equals("dynamic")) { return new byte[0]; } String assetLinkBehavior = portletPreferences.getValue("assetLinkBehavior", "showFullContent"); String rssDisplayStyle = portletPreferences.getValue("rssDisplayStyle", RSSUtil.DISPLAY_STYLE_ABSTRACT); String rssFeedType = portletPreferences.getValue("rssFeedType", RSSUtil.FEED_TYPE_DEFAULT); String rssName = portletPreferences.getValue("rssName", null); String format = RSSUtil.getFeedTypeFormat(rssFeedType); double version = RSSUtil.getFeedTypeVersion(rssFeedType); String rss = exportToRSS(portletRequest, portletResponse, rssName, null, format, version, rssDisplayStyle, assetLinkBehavior, getAssetEntries(portletRequest, portletResponse, portletPreferences)); return rss.getBytes(StringPool.UTF8); } protected static String exportToRSS(PortletRequest portletRequest, PortletResponse portletResponse, String name, String description, String format, double version, String displayStyle, String linkBehavior, List<AssetEntry> assetEntries) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) portletRequest.getAttribute(WebKeys.THEME_DISPLAY); SyndFeed syndFeed = new SyndFeedImpl(); syndFeed.setDescription(GetterUtil.getString(description, name)); List<SyndEntry> syndEntries = new ArrayList<>(); syndFeed.setEntries(syndEntries); for (AssetEntry assetEntry : assetEntries) { SyndEntry syndEntry = new SyndEntryImpl(); String author = PortalUtil.getUserName(assetEntry); syndEntry.setAuthor(author); SyndContent syndContent = new SyndContentImpl(); syndContent.setType(RSSUtil.ENTRY_TYPE_DEFAULT); String value = null; String languageId = LanguageUtil.getLanguageId(portletRequest); if (displayStyle.equals(RSSUtil.DISPLAY_STYLE_TITLE)) { value = StringPool.BLANK; } else { value = assetEntry.getSummary(languageId, true); } syndContent.setValue(value); syndEntry.setDescription(syndContent); String link = getEntryURL(portletRequest, portletResponse, linkBehavior, assetEntry); syndEntry.setLink(link); syndEntry.setPublishedDate(assetEntry.getPublishDate()); syndEntry.setTitle(assetEntry.getTitle(languageId, true)); syndEntry.setUpdatedDate(assetEntry.getModifiedDate()); syndEntry.setUri(syndEntry.getLink()); syndEntries.add(syndEntry); } syndFeed.setFeedType(RSSUtil.getFeedType(format, version)); List<SyndLink> syndLinks = new ArrayList<>(); syndFeed.setLinks(syndLinks); SyndLink selfSyndLink = new SyndLinkImpl(); syndLinks.add(selfSyndLink); String feedURL = getFeedURL(portletRequest); selfSyndLink.setHref(feedURL); selfSyndLink.setRel("self"); SyndLink alternateSyndLink = new SyndLinkImpl(); syndLinks.add(alternateSyndLink); alternateSyndLink.setHref(PortalUtil.getLayoutFullURL(themeDisplay)); alternateSyndLink.setRel("alternate"); syndFeed.setPublishedDate(new Date()); syndFeed.setTitle(name); syndFeed.setUri(feedURL); return RSSUtil.export(syndFeed); } /** * @deprecated As of 2.0.0, replaced by {@link * #getAssetEntries(PortletRequest, PortletResponse, * PortletPreferences)} */ @Deprecated protected static List<AssetEntry> getAssetEntries(PortletRequest portletRequest, PortletPreferences portletPreferences) throws Exception { throw new UnsupportedOperationException("This method is deprecated and replaced by #getAssetEntries(" + "PortletRequest, PortletResponse, PortletPreferences)"); } protected static List<AssetEntry> getAssetEntries(PortletRequest portletRequest, PortletResponse portletResponse, PortletPreferences portletPreferences) throws Exception { List<AssetEntry> assetEntries = new ArrayList<>(); SearchContainer searchContainer = new SearchContainer(); AssetPublisherCustomizer assetPublisherCustomizer = (AssetPublisherCustomizer) portletRequest .getAttribute(AssetPublisherWebKeys.ASSET_PUBLISHER_CUSTOMIZER); AssetPublisherDisplayContext assetPublisherDisplayContext = new AssetPublisherDisplayContext( assetPublisherCustomizer, portletRequest, portletResponse, portletPreferences); searchContainer.setDelta(assetPublisherDisplayContext.getRSSDelta()); List<AssetEntryResult> assetEntryResults = AssetPublisherUtil .getAssetEntryResults(assetPublisherDisplayContext, searchContainer, portletPreferences); for (AssetEntryResult assetEntryResult : assetEntryResults) { assetEntries.addAll(assetEntryResult.getAssetEntries()); } return assetEntries; } protected static String getAssetPublisherURL(PortletRequest portletRequest) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) portletRequest.getAttribute(WebKeys.THEME_DISPLAY); Layout layout = themeDisplay.getLayout(); PortletDisplay portletDisplay = themeDisplay.getPortletDisplay(); StringBundler sb = new StringBundler(6); String layoutFriendlyURL = GetterUtil.getString(PortalUtil.getLayoutFriendlyURL(layout, themeDisplay)); if (!layoutFriendlyURL.startsWith(Http.HTTP_WITH_SLASH) && !layoutFriendlyURL.startsWith(Http.HTTPS_WITH_SLASH)) { sb.append(themeDisplay.getPortalURL()); } sb.append(layoutFriendlyURL); sb.append(Portal.FRIENDLY_URL_SEPARATOR); sb.append("asset_publisher/"); sb.append(portletDisplay.getInstanceId()); sb.append(StringPool.SLASH); return sb.toString(); } protected static String getEntryURL(PortletRequest portletRequest, PortletResponse portletResponse, String linkBehavior, AssetEntry assetEntry) throws Exception { if (linkBehavior.equals("viewInPortlet")) { return getEntryURLViewInContext(portletRequest, portletResponse, assetEntry); } else { return getEntryURLAssetPublisher(portletRequest, portletResponse, assetEntry); } } protected static String getEntryURLAssetPublisher(PortletRequest portletRequest, PortletResponse portletResponse, AssetEntry assetEntry) throws Exception { AssetRendererFactory<?> assetRendererFactory = AssetRendererFactoryRegistryUtil .getAssetRendererFactoryByClassName(assetEntry.getClassName()); StringBundler sb = new StringBundler(4); sb.append(getAssetPublisherURL(portletRequest)); sb.append(assetRendererFactory.getType()); sb.append("/id/"); sb.append(assetEntry.getEntryId()); return sb.toString(); } protected static String getEntryURLViewInContext(PortletRequest portletRequest, PortletResponse portletResponse, AssetEntry assetEntry) throws Exception { String assetViewURL = AssetPublisherHelper.getAssetViewURL( PortalUtil.getLiferayPortletRequest(portletRequest), PortalUtil.getLiferayPortletResponse(portletResponse), assetEntry, true); if (Validator.isNotNull(assetViewURL) && !assetViewURL.startsWith(Http.HTTP_WITH_SLASH) && !assetViewURL.startsWith(Http.HTTPS_WITH_SLASH)) { ThemeDisplay themeDisplay = (ThemeDisplay) portletRequest.getAttribute(WebKeys.THEME_DISPLAY); assetViewURL = themeDisplay.getPortalURL() + assetViewURL; } return assetViewURL; } protected static String getFeedURL(PortletRequest portletRequest) throws Exception { String feedURL = getAssetPublisherURL(portletRequest); return feedURL.concat("rss"); } }