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 any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import mir.storage.StorageObject;
33 import mir.storage.StorageObjectExc;
34 import mir.storage.StorageObjectFailure;
36 public class EntityRelation {
40 public StorageObject storage;
43 public final static int TO_ONE = 1;
44 public final static int TO_MANY = 2;
48 * Kontruktor fuer EntityRelation
49 * @param fromId ist der Feldname in der ausgehenden Tabelle fuer die Relation
50 * @param toId ist der Feldname in der Zieltablle
51 * @param storage ist das StorageObject, ueber das der Zugriff auf die abhaengige
53 * @param type ist der Typ der EntityRelation (TO_ONE oder TO_MANY)
56 public EntityRelation(String fromId, String toId, StorageObject storage, int type) {
59 this.storage = storage;
64 * @return Liefert eine abhaengige Entity mit den verknuepften
65 * Entities, wenn es sich um eine TO_ONE Beziehung handelt, ansonsten
69 public Entity getOne(Entity entity) throws StorageObjectExc {
71 return storage.selectById(entity.getValue(fromId));
77 * @return Liefert eine freemarker.template.SimpleList mit den verknuepften
78 * Entities, wenn es sich um eine TO_MANY Liste handelt, ansonsten
82 public EntityList getMany(Entity entity) throws StorageObjectFailure{
84 return storage.selectByFieldValue(toId, entity.getValue(fromId));
90 * @return Liefert eine freemarker.template.SimpleList mit den verknuepften
91 * Entities, wenn es sich um eine TO_MANY Liste handelt, ansonsten
95 public EntityList getMany(Entity entity, String order) throws StorageObjectFailure{
97 return storage.selectByWhereClause(toId+"="+entity.getValue(fromId), order,-1);
103 * @return Liefert eine freemarker.template.SimpleList mit den verknuepften
104 * Entities, wenn es sich um eine TO_MANY Liste handelt, ansonsten
108 public EntityList getMany(Entity entity, String order, String whereClause) throws StorageObjectFailure{
110 return storage.selectByWhereClause(toId + "=" + entity.getValue(fromId) + " and " + whereClause, order,-1);
116 * @return The reference name of the related table.
119 public String getName() {
120 return "to" + storage.getTableName();