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.storage.Database;
40 import mir.storage.StorageObject;
41 import mir.storage.StorageObjectFailure;
42 import mircoders.entity.EntityContent;
45 * <b>this class implements the access to the content-table</b>
50 public class DatabaseContent extends Database implements StorageObject {
52 private static DatabaseContent instance;
53 private static EntityRelation relationComments;
54 private static EntityRelation relationFeature;
56 // Contructors / Singleton
58 // the following *has* to be sychronized cause this static method
59 // could get preemted and we could end up with 2 instances of DatabaseFoo.
60 // see the "Singletons with needles and thread" article at JavaWorld -mh
61 public synchronized static DatabaseContent getInstance()
62 throws StorageObjectFailure {
64 if (instance == null ) {
65 instance = new DatabaseContent();
66 instance.myselfDatabase = instance;
71 private DatabaseContent()
72 throws StorageObjectFailure {
75 this.theTable="content";
76 this.theCoreTable="media";
78 relationComments = new EntityRelation("id", "to_media", DatabaseComment.getInstance(), EntityRelation.TO_MANY);
79 relationFeature = new EntityRelation("id", "to_feature", DatabaseFeature.getInstance(), EntityRelation.TO_ONE);
80 try { this.theEntityClass = Class.forName("mircoders.entity.EntityContent"); }
81 catch (Exception e) { throw new StorageObjectFailure(e); }
87 * sets the database flag is_produced to unproduced
90 public void setUnproduced(String where) throws StorageObjectFailure
92 Connection con=null;Statement stmt=null;
93 String sql = "update content set is_produced='0' where " + where;
94 theLog.printDebugInfo("set unproduced: "+where);
97 // should be a preparedStatement because is faster
98 stmt = con.createStatement();
99 executeUpdate(stmt,sql);
100 theLog.printDebugInfo("set unproduced: "+where);
102 catch (Exception e) {_throwStorageObjectException(e, "-- set unproduced failed");}
103 finally { freeConnection(con,stmt);}
107 * returns the comments that belong to the article (via entityrelation)
108 * where db-flag is_published is true
110 public EntityList getComments(EntityContent entC) throws StorageObjectFailure {
111 return relationComments.getMany(entC,"webdb_create","is_published='1'");
115 * returns the features that belong to the article (via entityrelation)
117 public EntityList getFeature(EntityContent entC) throws StorageObjectFailure {
118 return relationFeature.getMany(entC);
121 public boolean delete(String id) throws StorageObjectFailure
123 DatabaseComment.getInstance().deleteByContentId(id);