01: /*
02: * Copyright (C) 2004 NNL Technology AB
03: * Visit www.infonode.net for information about InfoNode(R)
04: * products and how to contact NNL Technology AB.
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU General Public License
08: * as published by the Free Software Foundation; either version 2
09: * of the License, or (at your option) any later version.
10: *
11: * This program 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.
15: *
16: * You should have received a copy of the GNU General Public License
17: * along with this program; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19: * MA 02111-1307, USA.
20: */
21:
22: // $Id: PropertyMapValueHandler.java,v 1.3 2004/07/06 15:07:17 jesper Exp $
23: package net.infonode.properties.propertymap;
24:
25: import net.infonode.properties.base.Property;
26: import net.infonode.properties.base.exception.CantRemoveValueException;
27: import net.infonode.properties.propertymap.value.PropertyValue;
28: import net.infonode.properties.propertymap.value.SimplePropertyValue;
29: import net.infonode.properties.types.PropertyGroupProperty;
30: import net.infonode.properties.util.PropertyValueHandler;
31:
32: /**
33: * Property value handler for property maps.
34: *
35: * @author $Author: jesper $
36: * @version $Revision: 1.3 $
37: */
38: public class PropertyMapValueHandler implements PropertyValueHandler {
39: /**
40: * The instance of this class.
41: */
42: public static final PropertyMapValueHandler INSTANCE = new PropertyMapValueHandler();
43:
44: /**
45: * Constructor
46: */
47: private PropertyMapValueHandler() {
48: }
49:
50: public Object getValue(Property property, Object object) {
51: PropertyMapImpl propertyMap = (PropertyMapImpl) object;
52: PropertyValue value = propertyMap.getValueWithDefault(property);
53: return value == null ? null : value.getWithDefault(propertyMap);
54: }
55:
56: public void setValue(Property property, Object object, Object value) {
57: ((PropertyMapImpl) object).setValue(property,
58: new SimplePropertyValue(value));
59: }
60:
61: public boolean getValueIsRemovable(Property property, Object object) {
62: return !(property instanceof PropertyGroupProperty);
63: }
64:
65: public void removeValue(Property property, Object object) {
66: if (property instanceof PropertyGroupProperty)
67: throw new CantRemoveValueException(property);
68:
69: ((PropertyMapImpl) object).removeValue(property);
70: }
71:
72: public boolean getValueIsSet(Property property, Object object) {
73: return (property instanceof PropertyGroupProperty)
74: || ((PropertyMapImpl) object).valueIsSet(property);
75: }
76: }
|