Java tutorial
/** * OpenKM, Open Document Management System (http://www.openkm.com) * Copyright (c) 2006-2017 Paco Avila & Josep Llort * <p> * No bytes were intentionally harmed during the development of this application. * <p> * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * <p> * This program 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 General Public License for more details. * <p> * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ package com.openkm.extension.dao; import com.openkm.core.DatabaseException; import com.openkm.dao.HibernateUtil; import com.openkm.extension.dao.bean.WikiPage; import org.hibernate.HibernateException; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.Transaction; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Calendar; import java.util.List; /** * ExtensionDAO * * @author pavila */ public class WikiPageDAO { private static Logger log = LoggerFactory.getLogger(WikiPageDAO.class); private WikiPageDAO() { } /** * Create */ public static long create(WikiPage wkp) throws DatabaseException { log.debug("create({})", wkp); Session session = null; Transaction tx = null; try { session = HibernateUtil.getSessionFactory().openSession(); tx = session.beginTransaction(); Long id = (Long) session.save(wkp); HibernateUtil.commit(tx); log.debug("create: {}" + id); return id; } catch (HibernateException e) { HibernateUtil.rollback(tx); throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Update */ public static void update(WikiPage wkp) throws DatabaseException { log.debug("update({})", wkp); Session session = null; Transaction tx = null; try { session = HibernateUtil.getSessionFactory().openSession(); tx = session.beginTransaction(); session.update(wkp); HibernateUtil.commit(tx); } catch (HibernateException e) { HibernateUtil.rollback(tx); throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } log.debug("update: void"); } /** * Find all wiki pages */ @SuppressWarnings("unchecked") public static List<WikiPage> findAll() throws DatabaseException { log.debug("findAll({})"); String qs = "select wkp from WikiPage wkp where wkp.deleted=false order by wkp.date desc"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); List<WikiPage> ret = q.list(); log.debug("findAll: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Find all wiki pages by title */ @SuppressWarnings("unchecked") public static List<WikiPage> findAllByTitle(String title) throws DatabaseException { log.debug("findAllByTitle({})"); String qs = "select wkp from WikiPage wkp where wkp.title=:title and wkp.deleted=false order by wkp.date desc"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); q.setString("title", title); List<WikiPage> ret = q.list(); log.debug("findAllByTitle: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Find all wiki pages by title */ @SuppressWarnings("unchecked") public static List<WikiPage> findAllHistoricByTitle(String title) throws DatabaseException { log.debug("findAllHistoricByTitle({})"); String qs = "select wkp from WikiPage wkp where wkp.title=:title order by wkp.date desc"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); q.setString("title", title); List<WikiPage> ret = q.list(); log.debug("findAllHistoricByTitle: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Find all latest by title filtered */ @SuppressWarnings("unchecked") public static List<String> findAllLatestByTitleFiltered(String filter) throws DatabaseException { log.debug("findAllLatestByTitleFiltered({})", filter); String qs = "select distinct(wp.title) from WikiPage wp where wp.title like '%' || :filter || '%' and wp.deleted=false"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); q.setString("filter", filter); List<String> ret = q.list(); log.debug("findLatestByTitle: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Find latest by title */ public static WikiPage findLatestByTitle(String title) throws DatabaseException { log.debug("findLatestByTitle({})", title); String qs = "from WikiPage wp where wp.title=:title and wp.deleted=false order by wp.date desc"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); q.setString("title", title); WikiPage ret = (WikiPage) q.setMaxResults(1).uniqueResult(); log.debug("findLatestByTitle: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Find latest by node */ public static WikiPage findLatestByNode(String uuid) throws DatabaseException { log.debug("findLatestByNode({})", uuid); String qs = "from WikiPage wp where wp.node=:uuid and wp.deleted=false order by wp.date desc"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); q.setString("uuid", uuid); WikiPage ret = (WikiPage) q.setMaxResults(1).uniqueResult(); log.debug("findLatestByNode: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * Find by pk */ public static WikiPage findByPk(long id) throws DatabaseException { log.debug("findByPk({})", id); String qs = "from WikiPage wp where wp.id=:id"; Session session = null; try { session = HibernateUtil.getSessionFactory().openSession(); Query q = session.createQuery(qs); q.setLong("id", id); WikiPage ret = (WikiPage) q.setMaxResults(1).uniqueResult(); log.debug("findByPk: {}", ret); return ret; } catch (HibernateException e) { throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } /** * lock */ public static synchronized boolean lock(WikiPage wikiPage, String user) throws DatabaseException { // Only can locked last page WikiPage actualWikiPage = findLatestByTitle(wikiPage.getTitle()); if (actualWikiPage != null && actualWikiPage.getId() == wikiPage.getId() && (actualWikiPage.getLockUser() == null || actualWikiPage.getLockUser().equals(""))) { wikiPage.setLockUser(user); update(wikiPage); return true; } else { return false; } } /** * unlock */ public static synchronized boolean unlock(WikiPage wikiPage, String user) throws DatabaseException { // Only can locked last page WikiPage actualWikiPage = findLatestByTitle(wikiPage.getTitle()); if (actualWikiPage != null && actualWikiPage.getId() == wikiPage.getId() && (actualWikiPage.getLockUser() != null && actualWikiPage.getLockUser().equals(user))) { wikiPage.setLockUser(null); update(wikiPage); return true; } else { return false; } } /** * createNewWikiPage */ public static synchronized WikiPage createNewWikiPage(WikiPage wikiPage) throws DatabaseException { WikiPage latestWikiPage = findLatestByTitle(wikiPage.getTitle()); if (latestWikiPage == null) { wikiPage.setDate(Calendar.getInstance()); long id = create(wikiPage); return findByPk(id); } else { return latestWikiPage; } } /** * updateWikiPage */ public static synchronized WikiPage updateWikiPage(WikiPage wikiPage) throws DatabaseException { // To call update wiki page before we've executed on UI the lock WikiPage actualWikiPage = findLatestByTitle(wikiPage.getTitle()); if (actualWikiPage != null && actualWikiPage.getId() == wikiPage.getId() && isLockedByUser(actualWikiPage, wikiPage.getUser())) { wikiPage.setLockUser(null); // Unlock new register wikiPage.setDate(Calendar.getInstance()); long id = create(wikiPage); actualWikiPage.setLockUser(null); // Unlock older register we've updated update(actualWikiPage); return findByPk(id); } else { return null; } } /** * restoreWikiPage */ public static synchronized WikiPage restoreWikiPage(WikiPage wikiPage) throws DatabaseException { // To call update wiki page before we've executed on UI the lock WikiPage actualWikiPage = findLatestByTitle(wikiPage.getTitle()); if (actualWikiPage != null && isLockedByUser(actualWikiPage, wikiPage.getUser())) { wikiPage.setLockUser(null); // Unlock new register wikiPage.setDate(Calendar.getInstance()); wikiPage.setDeleted(false); // Change to false because could be restored from deleted wiki long id = create(wikiPage); actualWikiPage.setLockUser(null); // Unlock older register we've updated update(actualWikiPage); return findByPk(id); } else { return null; } } /** * deleteWikiPage */ public static synchronized boolean deleteWikiPage(WikiPage wikiPage) throws DatabaseException { // To call update wiki page before we've executed on UI the lock WikiPage actualWikiPage = findLatestByTitle(wikiPage.getTitle()); if (actualWikiPage != null && actualWikiPage.getId() == wikiPage.getId() && (actualWikiPage.getLockUser() == null || actualWikiPage.getLockUser().equals(""))) { for (WikiPage wikiPageToDelete : findAllByTitle(actualWikiPage.getTitle())) { wikiPageToDelete.setDeleted(true); update(wikiPageToDelete); } return true; } else { return false; } } /** * isLocked */ private static boolean isLockedByUser(WikiPage wikiPage, String user) { if (wikiPage.getLockUser() != null && wikiPage.getLockUser().equals(user)) { return true; } else { return false; } } /** * Remove wiki pages by parent node */ public static void purgeWikiPagesByNode(String nodeUuid) throws DatabaseException { log.debug("purgeWikiPagesByNode({})", nodeUuid); String qs = "delete from WikiPage wp where wp.node=:uuid"; Session session = null; Transaction tx = null; try { session = HibernateUtil.getSessionFactory().openSession(); tx = session.beginTransaction(); Query q = session.createQuery(qs); q.setString("uuid", nodeUuid); q.executeUpdate(); HibernateUtil.commit(tx); log.debug("purgeWikiPagesByNode: void"); } catch (HibernateException e) { HibernateUtil.rollback(tx); throw new DatabaseException(e.getMessage(), e); } finally { HibernateUtil.close(session); } } }