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.
36 import freemarker.template.*;
38 public class EntityRelation {
42 public StorageObject storage;
45 public final static int TO_ONE = 1;
46 public final static int TO_MANY = 2;
50 * Kontruktor fuer EntityRelation
51 * @param fromId ist der Feldname in der ausgehenden Tabelle fuer die Relation
52 * @param toId ist der Feldname in der Zieltablle
53 * @param storage ist das StorageObject, ueber das der Zugriff auf die abhaengige
55 * @param type ist der Typ der EntityRelation (TO_ONE oder TO_MANY)
58 public EntityRelation(String fromId, String toId, StorageObject storage, int type) {
61 this.storage = storage;
66 * @return Liefert eine abhaengige Entity mit den verknuepften
67 * Entities, wenn es sich um eine TO_ONE Beziehung handelt, ansonsten
71 public Entity getOne(Entity entity) throws StorageObjectException {
73 return storage.selectById(entity.getValue(fromId));
79 * @return Liefert eine freemarker.template.SimpleList mit den verknuepften
80 * Entities, wenn es sich um eine TO_MANY Liste handelt, ansonsten
84 public EntityList getMany(Entity entity) throws StorageObjectException{
86 return storage.selectByFieldValue(toId, entity.getValue(fromId));
92 * @return Liefert eine freemarker.template.SimpleList mit den verknuepften
93 * Entities, wenn es sich um eine TO_MANY Liste handelt, ansonsten
97 public EntityList getMany(Entity entity, String order) throws StorageObjectException{
99 return storage.selectByWhereClause(toId+"="+entity.getValue(fromId), order,-1);
105 * @return Liefert eine freemarker.template.SimpleList mit den verknuepften
106 * Entities, wenn es sich um eine TO_MANY Liste handelt, ansonsten
110 public EntityList getMany(Entity entity, String order, String whereClause) throws StorageObjectException{
112 return storage.selectByWhereClause(toId + "=" + entity.getValue(fromId) + " and " + whereClause, order,-1);
118 * @return The reference name of the related table.
121 public String getName() {
122 return "to" + storage.getTableName();