X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=source%2Fmircoders%2Fstorage%2FDatabaseContentToTopics.java;h=f1d4633ba035b91a154825c8937e1a12a0511065;hb=95c2e3a74f492f6f61d4dbe8bb47996f43af0627;hp=073ecd283635ac7cc23be67caee7c42d8e8babb3;hpb=3a661e8f0f659ab5ed2ac0e4d982ac0b398d11f1;p=mir.git diff --git a/source/mircoders/storage/DatabaseContentToTopics.java b/source/mircoders/storage/DatabaseContentToTopics.java index 073ecd28..f1d4633b 100755 --- a/source/mircoders/storage/DatabaseContentToTopics.java +++ b/source/mircoders/storage/DatabaseContentToTopics.java @@ -1,217 +1,290 @@ -package mircoders.storage; - -import java.lang.*; -import java.sql.*; -import java.io.*; -import java.util.*; +/* + * Copyright (C) 2001, 2002 The Mir-coders group + * + * This file is part of Mir. + * + * Mir 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. + * + * Mir 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. + * + * You should have received a copy of the GNU General Public License + * along with Mir; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * In addition, as a special exception, The Mir-coders gives permission to link + * the code of this program with any library licensed under the Apache Software License, + * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library + * (or with modified versions of the above that use the same license as the above), + * and distribute linked combinations including the two. You must obey the + * GNU General Public License in all respects for all of the code used other than + * the above mentioned libraries. If you modify this file, you may extend this + * exception to your version of the file, but you are not obligated to do so. + * If you do not wish to do so, delete this exception statement from your version. + */ -import freemarker.template.*; +package mircoders.storage; -import mir.storage.*; -import mir.entity.*; -import mir.misc.*; +import mir.entity.EntityList; +import mir.log.LoggerWrapper; +import mir.storage.Database; +import mir.storage.DatabaseFailure; +import mircoders.entity.EntityContent; +import mircoders.entity.EntityTopics; -import mircoders.entity.*; +import java.sql.Connection; +import java.sql.ResultSet; +import java.sql.Statement; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Iterator; +import java.util.List; /** - * Diese Klasse implementiert die Datenbankverbindung zur MetaObjekt-Tabelle - * + * This class implements the 1-n-relation between + * content and topic * */ -public class DatabaseContentToTopics extends Database implements StorageObject{ - - private static DatabaseContentToTopics instance; - - public static DatabaseContentToTopics getInstance() - throws StorageObjectException { - if (instance == null) { - instance = new DatabaseContentToTopics(); - instance.myselfDatabase = instance; - } - return instance; - } - - private DatabaseContentToTopics() - throws StorageObjectException { - - super(); - this.hasTimestamp = false; - this.theTable="content_x_topic"; - try { - // this.theEntityClass = Class.forName("mir.entity.EntityGruppen"); - } catch (Exception e) { - throw new StorageObjectException(e.toString()); - } - } - - - public EntityList getTopics(EntityContent content) { - EntityList returnList=null; - if (content != null) { - // get all to_topic from content_x_topic - String id = content.getId(); - String subselect = "id in (select topic_id from " + theTable + " where content_id=" + id+")"; - - try { - returnList = DatabaseTopics.getInstance().selectByWhereClause(subselect,-1); - } catch (Exception e) { - theLog.printDebugInfo("-- get topics failed " + e.toString()); - } - } - return returnList; - } - - - public void setTopics(EntityContent content, ArrayList topicId) { - if (content == null && topicId == null) { - return; - } - String contentId = content.getId(); - //first delete all row with content_id=contentId - String sql = "delete from "+ theTable +" where content_id=" + contentId; - - Connection con=null;Statement stmt=null; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - ResultSet rs = executeSql(stmt,sql); - } catch (Exception e) { - theLog.printDebugInfo("-- set topics failed -- delete"); - } finally { - freeConnection(con,stmt); - } - - //now insert - //first delete all row with content_id=contentId - - for (Iterator i = topicId.listIterator(); i.hasNext();) { - sql = "insert into "+ theTable +" (content_id,topic_id) values (" - + contentId + "," + i.next().toString() + ")"; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - ResultSet rs = executeSql(stmt,sql); - } catch (Exception e) { - theLog.printDebugInfo("-- set topics failed -- insert"); - } finally { - freeConnection(con,stmt); - } - } - } - - - public void setTopics(String contentId, String topicId) { - if (contentId == null && topicId == null) { - return; - } - //first delete all row with content_id=contentId - String sql = "delete from "+ theTable +" where content_id=" + contentId; - - Connection con=null;Statement stmt=null; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - int rs = executeUpdate(stmt,sql); - } catch (Exception e) { - theLog.printDebugInfo("-- set topics failed -- delete"); - } finally { - freeConnection(con,stmt); - } - - //now insert - //first delete all row with content_id=contentId - - sql = "insert into "+ theTable +" (content_id,topic_id) values (" - + contentId + "," + topicId + ")"; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - int rs = executeUpdate(stmt,sql); - } catch (Exception e) { - theLog.printDebugInfo("-- set topics failed -- insert"); - } finally { - freeConnection(con,stmt); - } - } - - public void deleteByContentId(String contentId) { - if (contentId == null) { - //theLog.printDebugInfo("-- delete topics failed -- no content id"); - return; - } - //delete all row with content_id=contentId - String sql = "delete from "+ theTable +" where content_id=" + contentId; - - Connection con=null;Statement stmt=null; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - ResultSet rs = executeSql(stmt,sql); - } catch (Exception e) { - //theLog.printDebugInfo("-- delete topics failed "); - } finally { - freeConnection(con,stmt); - } - } - - public void deleteByTopicId(String topicId) { - if (topicId == null) { - //theLog.printDebugInfo("-- delete topics failed -- no topic id"); - return; - } - //delete all row with content_id=contentId - String sql = "delete from "+ theTable +" where topic_id=" + topicId; - - Connection con=null;Statement stmt=null; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - ResultSet rs = executeSql(stmt,sql); - } catch (Exception e) { - theLog.printDebugInfo("-- delete topics failed "); - } finally { - freeConnection(con,stmt); - } - } - - - public EntityList getContent(EntityTopics topic) { - EntityList returnList=null; - if (topic != null) { - String id = topic.getId(); - String select = "select content_id from " + theTable + " where topic_id=" + id; - - // execute select statement - Connection con=null;Statement stmt=null; - try { - con = getPooledCon(); - // should be a preparedStatement because is faster - stmt = con.createStatement(); - ResultSet rs = executeSql(stmt,select); - if (rs!=null) { - String topicSelect= "id IN ("; - boolean first=true; - while (rs.next()) { - if (first==false) topicSelect+=","; - topicSelect += rs.getString(1); - first=false; - } - topicSelect+=")"; - if (first==false) - returnList = DatabaseContent.getInstance().selectByWhereClause(topicSelect,-1); - } - } - catch (Exception e) {theLog.printDebugInfo("-- get contetn failed");} - finally { freeConnection(con,stmt);} - } - return returnList; - } +public class DatabaseContentToTopics extends Database { + + private static DatabaseContentToTopics instance; + + public synchronized static DatabaseContentToTopics getInstance() { + if (instance == null) { + instance = new DatabaseContentToTopics(); + } + return instance; + } + + private DatabaseContentToTopics() { + super(); + + logger = new LoggerWrapper("Database.ContentToTopics"); + mainTable="content_x_topic"; + entityClass = mir.entity.GenericEntity.class; + } + + /** + * This class return an EntityList of Topics + */ + public EntityList getTopics(EntityContent content) { + EntityList returnList=null; + if (content != null) { + + String id = content.getId(); + try { + ArrayList extraTables = new ArrayList(); + extraTables.add(mainTable+" cxt"); + returnList = DatabaseTopics.getInstance() + .selectByWhereClauseWithExtraTables("t",extraTables, + "t.id=cxt.topic_id and cxt.content_id="+id ); + } + catch (Exception e) { + logger.error("-- get topics failed " + e.toString()); + } + } + return returnList; + } + + /** + * Returns a List of String-Objects from a content-id. + */ + public List getTopicsOfContent(String contentId) + throws DatabaseFailure { + ArrayList returnList = new ArrayList(); + + if (contentId != null) { + String sql = "select topic_id from " + mainTable + " where content_id=" + contentId; + Connection con=null;Statement stmt=null; + try { + con = obtainConnection(); + // should be a preparedStatement because is faster + stmt = con.createStatement(); + ResultSet rs = executeSql(stmt,sql); + if(rs!=null){ + while(rs.next()){ + returnList.add(Integer.toString(rs.getInt("topic_id"))); + } + } + } + catch (Exception e) { + logger.error("DatabaseContentToTopics.getTopicsOfContent: " + e.getMessage()); + } + finally { + freeConnection(con,stmt); + } + } + return returnList; + } + + private String getIdListExpression(List aList) { + String result = ""; + + Iterator i = aList.iterator(); + + while (i.hasNext()) { + result = result + i.next().toString(); + if (i.hasNext()) + result = result + ", "; + } + return result; + } + + public void setTopics(String anArticleId, String [] aTopics) throws DatabaseFailure { + if (aTopics==null) + setTopics(anArticleId, (List) null); + else + setTopics(anArticleId, Arrays.asList(aTopics)); + } + + public void setTopics(String anArticleId, List aTopics) throws DatabaseFailure { + List newTopics = new ArrayList(); + if (aTopics!=null) { + Iterator i = aTopics.iterator(); + + while (i.hasNext()) { + newTopics.add(new Integer(Integer.parseInt((String) i.next()))); + } + } + + List currentTopics = getTopicsOfContent(anArticleId); + logger.debug("New topics = " + newTopics.toString()); + logger.debug("Current topics = " + currentTopics.toString()); + List topicsToDelete = new ArrayList(currentTopics); + topicsToDelete.removeAll(newTopics); + List topicsToAdd = new ArrayList(newTopics); + topicsToAdd.removeAll(currentTopics); + logger.debug("to delete = " + topicsToDelete.toString()); + logger.debug("to add = " + topicsToAdd.toString()); + + + if (!topicsToDelete.isEmpty()) { + String sql = + "delete from " + mainTable + " " + + "where content_id=" + anArticleId + + " and topic_id in (" + getIdListExpression(topicsToDelete) + ")"; + + Connection connection=null; + Statement statement=null; + try { + connection = obtainConnection(); + statement = connection.createStatement(); + executeUpdate(statement, sql); + } + catch (Exception e) { + logger.error("-- deleting topics failed"); + } + finally { + try { + freeConnection(connection, statement); + } + catch (Throwable t) { + } + } + } + + Iterator i = topicsToAdd.iterator(); + while (i.hasNext()) { + Integer topicId = (Integer) i.next(); + String sql = + "insert into " + mainTable + " (content_id, topic_id) "+ + "values (" + anArticleId + "," + topicId + ")"; + Connection connection=null; + Statement statement=null; + try { + connection = obtainConnection(); + // should be a preparedStatement because is faster + statement = connection.createStatement(); + executeUpdate(statement, sql); + } + catch (Exception e) { + logger.error("-- adding topics failed"); + } + finally { + try { + freeConnection(connection, statement); + } + catch (Throwable t) { + } + } + } + } + + public void deleteByContentId(String contentId) + throws DatabaseFailure { + if (contentId == null) { + //theLog.printDebugInfo("-- delete topics failed -- no content id"); + return; + } + //delete all row with content_id=contentId + String sql = "delete from "+ mainTable +" where content_id=" + contentId; + + Connection con=null;Statement stmt=null; + try { + con = obtainConnection(); + // should be a preparedStatement because is faster + stmt = con.createStatement(); + executeSql(stmt,sql); + } catch (Exception e) { + //theLog.printDebugInfo("-- delete topics failed "); + } finally { + freeConnection(con,stmt); + } + } + + public void deleteByTopicId(String topicId) + throws DatabaseFailure { + if (topicId == null) { + //theLog.printDebugInfo("-- delete topics failed -- no topic id"); + return; + } + //delete all row with content_id=contentId + String sql = "delete from "+ mainTable +" where topic_id=" + topicId; + + Connection con=null;Statement stmt=null; + try { + con = obtainConnection(); + // should be a preparedStatement because is faster + stmt = con.createStatement(); + executeSql(stmt,sql); + } + catch (Exception e) { + logger.error("-- delete topics failed "); + } + finally { + freeConnection(con,stmt); + } + } + +/** + * Returns list of Content for a specific topic + * @param topic + * @return EntityList + * @throws DatabaseFailure + */ + public EntityList getContent(EntityTopics topic) + throws DatabaseFailure { + EntityList returnList=null; + if (topic != null) { + String id = topic.getId(); + try { + ArrayList extraTables = new ArrayList(); + extraTables.add(mainTable+" cxt"); + returnList = DatabaseContent.getInstance() + .selectByWhereClauseWithExtraTables("c",extraTables, + "c.id=cxt.content_id and cxt.topic_id="+id ); + } + catch (Exception e) { + logger.error("-- get content failed"); + } + } + return returnList; + } }