-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.Entity;
+import mir.entity.EntityRelation;
+import mir.log.LoggerWrapper;
+import mir.storage.Database;
+import mir.storage.StorageObject;
+import mir.storage.StorageObjectExc;
+import mir.storage.StorageObjectFailure;
/**
* <b>Diese Klasse implementiert die Datenbankverbindung zur MetaObjekt-Tabelle
public class DatabaseMedia extends Database implements StorageObject{
private static DatabaseMedia instance;
+ private static EntityRelation relationMediaType;
- public static DatabaseMedia getInstance() throws StorageObjectException {
+ // 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 DatabaseMedia getInstance() {
if (instance == null) {
instance = new DatabaseMedia();
- instance.myselfDatabase = instance;
}
return instance;
}
- private DatabaseMedia() throws StorageObjectException
- {
+ private DatabaseMedia() {
super();
- this.cache = new HashMap();
- this.hasTimestamp = false;
- this.theTable="media*";
+
+ logger = new LoggerWrapper("Database.Media");
+
+ hasTimestamp = false;
+ theTable="media";
+ relationMediaType =
+ new EntityRelation("to_media_type", "id", DatabaseMediaType.getInstance(), EntityRelation.TO_ONE);
+ theEntityClass = mircoders.entity.EntityMedia.class;
+ }
+
+ // methods
+
+
+ /**
+ * returns the comments that belong to the article (via entityrelation)
+ * where db-flag is_published is true
+ */
+ public Entity getMediaType(Entity ent) throws StorageObjectFailure, StorageObjectExc {
try {
- this.theEntityClass = Class.forName("mircoders.entity.EntityMedia");
+ return relationMediaType.getOne(ent);
}
- catch (Exception e) {
- throw new StorageObjectException(e.toString());
+ catch (Throwable e) {
+ logger.error("failed to get media_type: " + e.getMessage());
+ throw new StorageObjectFailure("DatabaseMedia.getMediaType :" + e.getMessage(),e);
}
}
-
}