-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();