-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 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;
-import mircoders.entity.*;
+import mir.entity.EntityList;
+import mir.log.LoggerWrapper;
+import mir.storage.Database;
+import mir.storage.StorageObjectFailure;
+import mircoders.entity.EntityContent;
+import mircoders.entity.EntityTopics;
/**
* <b>This class implements the 1-n-relation between
*
*/
-public class DatabaseContentToTopics extends Database implements StorageObject{
+public class DatabaseContentToTopics extends Database {
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 {
+ public synchronized static DatabaseContentToTopics getInstance() {
if (instance == null) {
instance = new DatabaseContentToTopics();
- instance.myselfDatabase = instance;
}
return instance;
}
- private DatabaseContentToTopics()
- throws StorageObjectException {
-
+ private DatabaseContentToTopics() {
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()); }
+ logger = new LoggerWrapper("Database.ContentToTopics");
+ mainTable="content_x_topic";
+ entityClass = mir.entity.GenericEntity.class;
}
/**
* 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+")";
+ String id = content.getId();
try {
- returnList = DatabaseTopics.getInstance().selectByWhereClause(subselect,-1);
- } catch (Exception e) {
- theLog.printDebugInfo("-- get topics failed " + e.toString());
+ 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 ArrayList of Integer-Objects from a content-id.
- * @returns ArrayList
+ * Returns a List of String-Objects from a content-id.
*/
- public ArrayList getTopicsOfContent(String contentId)
- throws StorageObjectException {
+ public List getTopicsOfContent(String contentId)
+ throws StorageObjectFailure {
ArrayList returnList = new ArrayList();
+
if (contentId != null) {
- String sql = "select topic_id from " + theTable + " where content_id=" + contentId;
+ String sql = "select topic_id from " + mainTable + " where content_id=" + contentId;
Connection con=null;Statement stmt=null;
try {
- con = getPooledCon();
+ 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(new Integer(rs.getInt("topic_id")));
+ returnList.add(Integer.toString(rs.getInt("topic_id")));
}
}
- } catch (Exception e) {
- theLog.printError(e.toString());
- theLog.printError("-- get topicsofcontent failed");
- } finally {
+ }
+ catch (Exception e) {
+ logger.error("DatabaseContentToTopics.getTopicsOfContent: " + e.getMessage());
+ }
+ finally {
freeConnection(con,stmt);
}
}
return returnList;
}
- /**
- * Set new topics
- */
- public void setTopics(String contentId, String[] topicId)
- throws StorageObjectException {
- if (contentId == null){
- return;
+ private String getIdListExpression(List aList) {
+ String result = "";
+
+ Iterator i = aList.iterator();
+
+ while (i.hasNext()) {
+ result = result + i.next().toString();
+ if (i.hasNext())
+ result = result + ", ";
}
- if (topicId==null || topicId[0]==null) {
- return;
+ return result;
+ }
+
+ public void setTopics(String anArticleId, String [] aTopics) throws StorageObjectFailure {
+ if (aTopics==null)
+ setTopics(anArticleId, (List) null);
+ else
+ setTopics(anArticleId, Arrays.asList(aTopics));
+ }
+
+ public void setTopics(String anArticleId, List aTopics) throws StorageObjectFailure {
+ List newTopics = new ArrayList();
+ if (aTopics!=null) {
+ Iterator i = aTopics.iterator();
+
+ while (i.hasNext()) {
+ newTopics.add(new Integer(Integer.parseInt((String) i.next())));
+ }
}
- //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]);
- }
+ 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);
}
- //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;
- }
+ catch (Exception e) {
+ logger.error("-- deleting topics failed");
+ }
+ finally {
+ try {
+ freeConnection(connection, statement);
}
- if(delete==true){
- toDelete.add(topic.toString());
- theLog.printDebugInfo("to delete: "+ topic.toString());
+ catch (Throwable t) {
}
}
- } 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]);
- }
}
- //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() + ")";
+ 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 {
- con = getPooledCon();
+ connection = obtainConnection();
// 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);
+ 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 StorageObjectException {
+ throws StorageObjectFailure {
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;
+ String sql = "delete from "+ mainTable +" where content_id=" + contentId;
Connection con=null;Statement stmt=null;
try {
- con = getPooledCon();
+ con = obtainConnection();
// should be a preparedStatement because is faster
stmt = con.createStatement();
- ResultSet rs = executeSql(stmt,sql);
+ executeSql(stmt,sql);
} catch (Exception e) {
//theLog.printDebugInfo("-- delete topics failed ");
} finally {
}
public void deleteByTopicId(String topicId)
- throws StorageObjectException {
+ throws StorageObjectFailure {
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;
+ String sql = "delete from "+ mainTable +" where topic_id=" + topicId;
Connection con=null;Statement stmt=null;
try {
- con = getPooledCon();
+ con = obtainConnection();
// should be a preparedStatement because is faster
stmt = con.createStatement();
- ResultSet rs = executeSql(stmt,sql);
- } catch (Exception e) {
- theLog.printDebugInfo("-- delete topics failed ");
- } finally {
+ 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 StorageObjectFailure
+ */
public EntityList getContent(EntityTopics topic)
- throws StorageObjectException {
+ throws StorageObjectFailure {
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);
- }
+ 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");
}
- catch (Exception e) {theLog.printDebugInfo("-- get contetn failed");}
- finally { freeConnection(con,stmt);}
}
return returnList;
}
projects / mir.git / blobdiff