2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with the com.oreilly.servlet library, any library
22 * licensed under the Apache Software License, The Sun (tm) Java Advanced
23 * Imaging library (JAI), The Sun JIMI library (or with modified versions of
24 * the above that use the same license as the above), and distribute linked
25 * combinations including the two. You must obey the GNU General Public
26 * License in all respects for all of the code used other than the above
27 * mentioned libraries. If you modify this file, you may extend this exception
28 * to your version of the file, but you are not obligated to do so. If you do
29 * not wish to do so, delete this exception statement from your version.
32 package mircoders.storage;
34 import java.sql.Connection;
35 import java.sql.Statement;
37 import mir.entity.EntityList;
38 import mir.entity.EntityRelation;
39 import mir.log.LoggerWrapper;
40 import mir.storage.Database;
41 import mir.storage.StorageObject;
42 import mir.storage.StorageObjectFailure;
43 import mircoders.entity.EntityContent;
46 * <b>this class implements the access to the content-table</b>
51 public class DatabaseContent extends Database implements StorageObject {
53 private static DatabaseContent instance;
54 private static EntityRelation relationComments;
55 private static EntityRelation relationFeature;
57 // Contructors / Singleton
59 // the following *has* to be sychronized cause this static method
60 // could get preemted and we could end up with 2 instances of DatabaseFoo.
61 // see the "Singletons with needles and thread" article at JavaWorld -mh
62 public synchronized static DatabaseContent getInstance()
63 throws StorageObjectFailure {
65 if (instance == null ) {
66 instance = new DatabaseContent();
67 instance.myselfDatabase = instance;
72 private DatabaseContent() throws StorageObjectFailure {
77 logger = new LoggerWrapper("Database.Content");
80 new EntityRelation("id", "to_media", DatabaseComment.getInstance(), EntityRelation.TO_MANY);
82 new EntityRelation("id", "to_feature", DatabaseFeature.getInstance(), EntityRelation.TO_ONE);
83 theEntityClass = mircoders.entity.EntityContent.class;
89 * sets the database flag is_produced to unproduced
92 public void setUnproduced(String where) throws StorageObjectFailure
94 Connection con=null;Statement stmt=null;
95 String sql = "update content set is_produced='0' where " + where;
96 logger.debug("set unproduced: "+where);
99 // should be a preparedStatement because is faster
100 stmt = con.createStatement();
101 executeUpdate(stmt,sql);
102 logger.debug("set unproduced: "+where);
104 catch (Exception e) {_throwStorageObjectException(e, "-- set unproduced failed");}
105 finally { freeConnection(con,stmt);}
109 * returns the comments that belong to the article (via entityrelation)
110 * where db-flag is_published is true
112 public EntityList getComments(EntityContent entC) throws StorageObjectFailure {
113 return relationComments.getMany(entC,"webdb_create","is_published='1'");
117 * returns the features that belong to the article (via entityrelation)
119 public EntityList getFeature(EntityContent entC) throws StorageObjectFailure {
120 return relationFeature.getMany(entC);
123 public boolean delete(String id) throws StorageObjectFailure
125 DatabaseComment.getInstance().deleteByContentId(id);