+/*
+ * 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 the com.oreilly.servlet library, 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.
+ */
+
package mircoders.storage;
import java.lang.*;
import freemarker.template.*;
-import webdb.storage.*;
-import webdb.entity.*;
-import webdb.misc.*;
-
+import mir.storage.*;
import mir.entity.*;
+import mir.misc.*;
+
+import mircoders.entity.*;
/**
- * <b>Diese Klasse implementiert die Datenbankverbindung zur MetaObjekt-Tabelle
- *
+ * <b>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);
- }
+ private static DatabaseContentToTopics instance;
+
+ // the following *has* to be sychronized cause this static method
+ // could get preemted and we could end up with 2 instances of DatabaseFoo.
+ // see the "Singletons with needles and thread" article at JavaWorld -mh
+ public synchronized 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.GenericEntity"); }
+ catch (Exception e) { throw new StorageObjectException(e.toString()); }
+
+ }
+
+ /**
+ * This class return an EntityList of Topics
+ * @param EntityContent content
+ * @returns EntityList
+ */
+ 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;
+ }
+
+ /**
+ * Returns a ArrayList of Integer-Objects from a content-id.
+ * @returns ArrayList
+ */
+ public ArrayList getTopicsOfContent(String contentId)
+ throws StorageObjectException {
+ ArrayList returnList = new ArrayList();
+ if (contentId != null) {
+ String sql = "select topic_id 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);
+ if(rs!=null){
+ while(rs.next()){
+ returnList.add(new Integer(rs.getInt("topic_id")));
+ }
+ }
+ } catch (Exception e) {
+ theLog.printError(e.toString());
+ theLog.printError("-- get topicsofcontent failed");
+ } finally {
+ freeConnection(con,stmt);
+ }
+ }
+ return returnList;
+ }
+
+ /**
+ * Set new topics
+ */
+ public void setTopics(String contentId, String[] topicId)
+ throws StorageObjectException {
+ if (contentId == null){
+ return;
+ }
+ if (topicId==null || topicId[0]==null) {
+ return;
+ }
+ //first check which topics this article has
+ Collection hasTopics = getTopicsOfContent(contentId);
+ Collection toSet = new ArrayList();
+ Collection toDelete = new ArrayList();
+
+ if(hasTopics!=null && hasTopics.size()>0){
+ //now we check if there are new topics and copy them to an array.
+ for(int i = 0; i< topicId.length;i++){
+ boolean set=false;
+ int whichTopic = 0;
+ for(Iterator it=hasTopics.iterator();it.hasNext();){
+ Integer topic = (Integer)it.next();
+ if(topicId[i].equals(topic.toString())){
+ set=true;
+ } else {
+ whichTopic = i;
+ }
+ }
+ if(set==false){
+ toSet.add(topicId[i]);
+ theLog.printDebugInfo("to set: "+ topicId[i]);
+ }
+ }
+ //now we check if we have to delete topics
+ for(Iterator it=hasTopics.iterator();it.hasNext();){
+ boolean delete=true;
+ int whichTopic = 0;
+ Integer topic = (Integer)it.next();
+ for(int i = 0; i< topicId.length;i++){
+ if(topicId[i].equals(topic.toString())){
+ delete=false;
+ } else {
+ whichTopic = i;
+ }
+ }
+ if(delete==true){
+ toDelete.add(topic.toString());
+ theLog.printDebugInfo("to delete: "+ topic.toString());
+ }
+ }
+ } else {
+ //all the topics has to be set, so we copy all to the array
+ for (int i = 0; i < topicId.length; i++){
+ toSet.add(topicId[i]);
}
- catch (Exception e) {theLog.printDebugInfo("-- get contetn failed");}
- finally { freeConnection(con,stmt);}
- }
- return returnList;
- }
+ }
+
+ //first delete all row with content_id=contentId
+ String sql = "delete from "+ theTable +" where content_id=" + contentId
+ + " and topic_id in (";
+ boolean first=false;
+ for(Iterator it = toDelete.iterator(); it.hasNext();){
+ if(first==false){
+ first=true;
+ } else {
+ sql+=",";
+ }
+ sql+= (String)it.next();
+ }
+ sql+=")";
+ 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("-- deleting topics failed");
+ } finally {
+ freeConnection(con,stmt);
+ }
+
+ //now insert
+ //first delete all row with content_id=contentId
+ for (Iterator it = toSet.iterator(); it.hasNext();) {
+ sql = "insert into "+ theTable +" (content_id,topic_id) values ("
+ + contentId + "," + (String)it.next() + ")";
+ 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 laenge topicId" + topicId.length);
+ } finally {
+ freeConnection(con,stmt);
+ }
+ }
+ }
+
+ public void deleteByContentId(String contentId)
+ throws StorageObjectException {
+ 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)
+ throws StorageObjectException {
+ 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)
+ throws StorageObjectException {
+ 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;
+ }
}
projects / mir.git / blobdiff