01: /*
02: * GeoTools - OpenSource mapping toolkit
03: * http://geotools.org
04: * (C) 2005-2006, GeoTools Project Managment Committee (PMC)
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation;
09: * version 2.1 of the License.
10: *
11: * This library 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 GNU
14: * Lesser General Public License for more details.
15: */
16: package org.geotools.event;
17:
18: /**
19: * Indicates a constant immutable data object, may be shared (and will
20: * not issue change notifications).
21: *
22: * @author Jody Garnett, Refractions Research, Inc.
23: *
24: * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/api/src/main/java/org/geotools/event/GTConstant.java $
25: */
26: public class GTConstant implements GTComponent {
27: public static final GTRoot SHARED = GTRoot.NO_PARENT;
28:
29: public Object clone() {
30: return this ; // we are constant
31: }
32:
33: public GTComponent getParent() {
34: return getNote().getParent();
35: }
36:
37: public void removed(GTDelta delta) {
38: throw new IllegalStateException(
39: "A child has changed in an immutable Default!");
40: }
41:
42: public void changed(GTDelta delta) {
43: throw new IllegalStateException(
44: "A child has changed in an immutable Default!");
45: }
46:
47: public GTNote getNote() {
48: return GTNote.EMPTY;
49: }
50:
51: public void setNote(GTNote container) {
52: // TODO Auto-generated method stub
53: }
54: }
|