01: /*
02: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
04: *
05: * This program is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU General Public License version
07: * 2 only, as published by the Free Software Foundation.
08: *
09: * This program is distributed in the hope that it will be useful, but
10: * WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * General Public License version 2 for more details (a copy is
13: * included at /legal/license.txt).
14: *
15: * You should have received a copy of the GNU General Public License
16: * version 2 along with this work; if not, write to the Free Software
17: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18: * 02110-1301 USA
19: *
20: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
21: * Clara, CA 95054 or visit www.sun.com if you need additional
22: * information or have any questions.
23: */
24:
25: package javax.microedition.khronos.egl;
26:
27: import java.util.Hashtable;
28: import java.lang.ref.WeakReference;
29:
30: /**
31: * A class encapsulating an EGL display. An <code>EGLDisplay</code>
32: * instance may be obtained from <code>EGL.eglGetDisplay</code>.
33: */
34: final class EGLDisplayImpl extends EGLDisplay {
35:
36: private static final Hashtable byId = new Hashtable();
37: int nativeId;
38:
39: public EGLDisplayImpl(int nativeId) {
40: synchronized (byId) {
41: this .nativeId = nativeId;
42: byId.put(new Integer(nativeId), new WeakReference(this ));
43: }
44: }
45:
46: public int nativeId() {
47: return nativeId;
48: }
49:
50: public static EGLDisplayImpl getInstance(int nativeId) {
51: synchronized (byId) {
52: WeakReference ref = (WeakReference) byId.get(new Integer(
53: nativeId));
54: EGLDisplayImpl display = ref != null ? (EGLDisplayImpl) ref
55: .get() : null;
56: if (display == null) {
57: return new EGLDisplayImpl(nativeId);
58: } else {
59: return display;
60: }
61: }
62: }
63:
64: public String toString() {
65: return "EGLDisplayImpl[" + nativeId + "]";
66: }
67:
68: public void dispose() {
69: synchronized (byId) {
70: byId.remove(new Integer(nativeId));
71: this .nativeId = 0;
72: }
73: }
74: }
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