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.
34 import java.io.PrintWriter;
37 import mir.entity.adapter.EntityAdapter;
38 import mir.util.ParameterExpander;
41 public abstract class EntityModifyingProducerNode implements ProducerNode {
42 String entityExpression;
44 String valueExpression;
46 public EntityModifyingProducerNode(String anEntityExpression, String anEntityField, String aValueExpression) {
47 entityExpression = anEntityExpression;
48 entityField = anEntityField;
49 valueExpression = aValueExpression;
52 public void produce(Map aValueMap, String aVerb, PrintWriter aLogger) throws ProducerFailure {
56 entity = ParameterExpander.findValueForKey( aValueMap, entityExpression );
58 if (entity instanceof EntityAdapter) {
59 ((EntityAdapter) entity).getEntity().setValueForProperty(entityField, valueExpression);
60 ((EntityAdapter) entity).getEntity().update();
63 throw new Exception( entityExpression + " does not evaluate to an entity");
66 aLogger.println("Error while performing entity modifying operation: " + t.getMessage());
68 throw new ProducerFailure(t.getMessage(), t);