Liferay:如何在AssetPublisher Portlet中查找具有特定JournalArticle的所有布局? [英] Liferay: How to find all Layouts with the specific JournalArticle in AssetPublisher portlets?

问题描述

要求很容易.有人发布带有某些标签(TagA，TagB)的JournalArticle.在其他页面(布局)上，我们有AssetPublisher门户，这些门户显示具有这些标签(例如TagA或TagB)的所有JournalArticles.问题是，如何以编程方式获取此布局?

The requirements is easy. Someone publish a JournalArticle with some Tags (TagA, TagB). On the other pages (Layouts) we have AssetPublisher portles that show all JournalArticles with those Tags (e.g. TagA or TagB). The question is, how to get this layouts programmaticaly?

推荐答案

我用递归DynamicQuery来解决它，请尽情享受:

I solve it with recursive DynamicQuery, enjoy:

public static Set<Layout> getLayoutsWithThisTags(SortedSet<String> tags) throws SystemException, PortalException {
    Set<Layout> layouts = new HashSet<Layout>();

    //build DynamicQuery that contains "assetTags" as "queryName0", see configuration of AssetPublisher
    DynamicQuery query = DynamicQueryFactoryUtil.forClass(com.liferay.portal.model.PortletPreferences.class, PortalClassLoaderUtil.getClassLoader())
            .add(PropertyFactoryUtil.forName("preferences").like("%<preference><name>queryName0</name><value>assetTags</value></preference>%"))
            .add(getTagConditions(tags));

    Set<PortletPreferences> preferences = new HashSet<PortletPreferences>(PortletPreferencesLocalServiceUtil.dynamicQuery(query));
    for (PortletPreferences portletPreferences : preferences) {
        long plid = portletPreferences.getPlid();
        layouts.add(LayoutLocalServiceUtil.getLayout(plid));
    }

    return layouts;
}

private static Criterion getTagConditions(SortedSet<String> tags) {
    //create recursive OR-Criterion that contains any of the tags
    Criterion criterion = RestrictionsFactoryUtil.or(
            PropertyFactoryUtil.forName("preferences").like("%<preference><name>queryValues0</name>%<value>" + tags.first() +"</value>%"),
            (tags.size() > 2) ? getTagConditions(tail(tags)) :
                PropertyFactoryUtil.forName("preferences").like("%<preference><name>queryValues0</name>%<value>" + tags.last() +"</value>%"));
    return criterion;
}

private static SortedSet<String> tail(SortedSet<String> tags) {
    tags.remove(tags.first());
    return tags; 
}

对于具有250页(布局)的门户网站，此代码需要12ms.

for Portal with 250 Pages (Layouts) this code need 12ms.

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