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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.tools.util; | ||
| 27 | |||
| 28 | import sun.tools.java.*; | ||
| 29 | |||
| 30 | |||
| 31 | /** | ||
| 32 | * A class whose instances are filters over Modifier bits. | ||
| 33 | * Filtering is done by returning boolean values. | ||
| 34 | * Classes, methods and fields can be filtered, or filtering | ||
| 35 | * can be done directly on modifier bits. | ||
| 36 | * | ||
| 37 | * WARNING: The contents of this source file are not part of any | ||
| 38 | * supported API. Code that depends on them does so at its own risk: | ||
| 39 | * they are subject to change or removal without notice. | ||
| 40 | * | ||
| 41 | * @see java.lang.reflect.Modifier | ||
| 42 | * @author Robert Field | ||
| 43 | */ | ||
| 44 | |||
| 45 | public | ||
| 46 | class ModifierFilter extends java.lang.reflect.Modifier { | ||
| 47 | |||
| 48 | /** | ||
| 49 | * Package private access. | ||
| 50 | * A "pseudo-" modifier bit that can be used in the | ||
| 51 | * constructors of this class to specify package private | ||
| 52 | * access. This is needed since there is no Modifier.PACKAGE. | ||
| 53 | */ | ||
| 54 | public static final long PACKAGE = 0x8000000000000000L; | ||
| 55 | |||
| 56 | /** | ||
| 57 | * All access modifiers. | ||
| 58 | * A short-hand set of modifier bits that can be used in the | ||
| 59 | * constructors of this class to specify all access modifiers, | ||
| 60 | * Same as PRIVATE | PROTECTED | PUBLIC | PACKAGE. | ||
| 61 | */ | ||
| 62 | public static final long ALL_ACCESS = | ||
| 63 | PRIVATE | PROTECTED | PUBLIC | PACKAGE; | ||
| 64 | |||
| 65 | private long oneOf; | ||
| 66 | private long must; | ||
| 67 | private long cannot; | ||
| 68 | |||
| 69 | private static final int ACCESS_BITS = PRIVATE | PROTECTED | PUBLIC; | ||
| 70 | |||
| 71 | /** | ||
| 72 | * Constructor - Specify a filter. | ||
| 73 | * | ||
| 74 | * @param oneOf If zero, everything passes the filter. | ||
| 75 | * If non-zero, at least one of the specified | ||
| 76 | * bits must be on in the modifier bits to | ||
| 77 | * pass the filter. | ||
| 78 | */ | ||
| 79 | public | ||
| 80 | ModifierFilter(long oneOf) { | ||
| 81 | this(oneOf, 0, 0); | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * Constructor - Specify a filter. | ||
| 86 | * For example, the filter below will only pass synchronized | ||
| 87 | * methods that are private or package private access and are | ||
| 88 | * not native or static. | ||
| 89 | * <pre> | ||
| 90 | * ModifierFilter( Modifier.PRIVATE | ModifierFilter.PACKAGE, | ||
| 91 | * Modifier.SYNCHRONIZED, | ||
| 92 | * Modifier.NATIVE | Modifier.STATIC) | ||
| 93 | * </pre><p> | ||
| 94 | * Each of the three arguments must either be | ||
| 95 | * zero or the or'ed combination of the bits specified in the | ||
| 96 | * class Modifier or this class. During filtering, these values | ||
| 97 | * are compared against the modifier bits as follows: | ||
| 98 | * | ||
| 99 | * @param oneOf If zero, ignore this argument. | ||
| 100 | * If non-zero, at least one of the bits must be on. | ||
| 101 | * @param must All bits specified must be on. | ||
| 102 | * @param cannot None of the bits specified can be on. | ||
| 103 | */ | ||
| 104 | public | ||
| 105 | ModifierFilter(long oneOf, long must, long cannot) { | ||
| 106 | this.oneOf = oneOf; | ||
| 107 | this.must = must; | ||
| 108 | this.cannot = cannot; | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Filter on modifier bits. | ||
| 113 | * | ||
| 114 | * @param modifierBits Bits as specified in the Modifier class | ||
| 115 | * | ||
| 116 | * @return Whether the modifierBits pass this filter. | ||
| 117 | */ | ||
| 118 | public boolean checkModifier(int modifierBits) { | ||
| 119 | // Add in the "pseudo-" modifier bit PACKAGE, if needed | ||
| 120 | long fmod = ((modifierBits & ACCESS_BITS) == 0) ? | ||
| 121 | modifierBits | PACKAGE : | ||
| 122 | modifierBits; | ||
| 123 | return ((oneOf == 0) || ((oneOf & fmod) != 0)) && | ||
| 124 | ((must & fmod) == must) && | ||
| 125 | ((cannot & fmod) == 0); | ||
| 126 | } | ||
| 127 | |||
| 128 | /** | ||
| 129 | * Filter a MemberDefinition. | ||
| 130 | * | ||
| 131 | * @param field A MemberDefinition | ||
| 132 | * | ||
| 133 | * @return Whether the modifier of the field | ||
| 134 | * passes this filter. | ||
| 135 | * | ||
| 136 | * @see sun.tools.MemberDefinition | ||
| 137 | */ | ||
| 138 | public boolean checkMember(MemberDefinition field) { | ||
| 139 | return checkModifier(field.getModifiers()); | ||
| 140 | } | ||
| 141 | |||
| 142 | /** | ||
| 143 | * Filter a ClassDefinition. | ||
| 144 | * | ||
| 145 | * @param cdef A ClassDefinition | ||
| 146 | * | ||
| 147 | * @return Whether the modifier of the class | ||
| 148 | * passes this filter. | ||
| 149 | * | ||
| 150 | * @see sun.tools.ClassDefinition | ||
| 151 | */ | ||
| 152 | public boolean checkClass(ClassDefinition cdef) { | ||
| 153 | return checkModifier(cdef.getModifiers()); | ||
| 154 | } | ||
| 155 | |||
| 156 | } // end ModifierFilter | ||