01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * Portions Copyrighted 2007 Sun Microsystems, Inc.
27: */
28:
29: package org.netbeans.modules.asm.model.util;
30:
31: // "Type Safe" bit mask
32: abstract public class BitMask<T extends BitMask> {
33:
34: private int mask;
35:
36: protected BitMask(int mask) {
37: this .mask = mask;
38: }
39:
40: public T apply(T u) {
41: return create(mask | u.mask);
42: }
43:
44: public boolean contains(T u) {
45: return ((~mask) & u.mask) == 0;
46: }
47:
48: public boolean intersects(T u) {
49: return (mask & u.mask) != 0;
50: }
51:
52: protected abstract T create(int param);
53: }
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