01: /*
02: *
03: *
04: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: */
26:
27: package com.sun.midp.chameleon;
28:
29: /** The element of the layer list with forward and backward links */
30: class CLayerElement {
31: /** The layer instance */
32: protected CLayer layer;
33: /** The next upper layer in the layers list */
34: protected CLayerElement upper;
35: /** The previous lower layer in the layers list */
36: protected CLayerElement lower;
37:
38: /**
39: * Construct layer element with specified content and links
40: *
41: * @param layer element conten
42: * @param lower reference to the previous lower layer element
43: * @param upper reference to the next upper layer element
44: */
45: CLayerElement(CLayer layer, CLayerElement lower, CLayerElement upper) {
46: this .layer = layer;
47: this .upper = upper;
48: this .lower = lower;
49: }
50:
51: /**
52: * Get list element with next uppper layer
53: * @return list element with upper layer inside, null if none
54: */
55: CLayerElement getUpper() {
56: return upper;
57: }
58:
59: /**
60: * Get list element with previous lower layer
61: * @return list element with lower layer inside, null if none
62: */
63: CLayerElement getLower() {
64: return lower;
65: }
66:
67: /**
68: * Get layer instance stored by list element
69: * @return
70: */
71: CLayer getLayer() {
72: return layer;
73: }
74: }
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