2 * Copyright (C) 2005 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 * You must obey the GNU General Public License in all respects for all of the code used
23 * other than the above mentioned libraries. If you modify this file, you may extend this
24 * exception to your version of the file, but you are not obligated to do so.
25 * If you do not wish to do so, delete this exception statement from your version.
30 import java.util.List;
32 import mir.storage.DatabaseExc;
33 import mir.storage.DatabaseFailure;
36 * An <code>Entity</code> represents a persistent data object, typically
37 * stored in a database.<p>
39 * @version $Id: Entity.java,v 1.24 2007/04/08 21:46:44 idfx Exp $
42 public interface Entity {
44 * Sets the values of the Entity. (Only to be called by the Storage Object)
46 * @param aMap Map containing the new values of the Entity
49 public void setFieldValues(Map aMap);
52 * Returns the primary key of the Entity.
55 public String getId();
58 * Defines the primary key of the Entity (only to be set by the Database)
61 public void setId(String id);
64 * Inserts Entity into the database via Database
65 * @return Primary Key of the Entity
66 * @exception DatabaseExc
68 public String insert() throws DatabaseExc;
71 * Saves changes of this Entity to the database
72 * @exception DatabaseFailure
74 public void update() throws DatabaseFailure;
77 * Sets the value for a field. Issues a log message if the field name
78 * supplied was not found in the Entity.
79 * @param aFieldName The field name whose value has to be set
80 * @param aValue The new value of the field
81 * @exception DatabaseFailure
83 public void setFieldValue(String aFieldName, String aValue);
86 * Returns the field names of the Entity
88 public List getFieldNames() throws DatabaseFailure;
91 * Returns the value of a field by field name.
92 * @param aFieldName The name of the field
93 * @return value of the field
95 public String getFieldValue(String aFieldName);
97 public boolean hasFieldValue(String aFieldName);
99 /** Returns whether fieldName is a valid field name of this Entity.
101 public boolean hasField(String aFieldName) throws DatabaseFailure;