1b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/* 2b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ProGuard -- shrinking, optimization, obfuscation, and preverification 3b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * of Java bytecode. 4b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 5b9cc48a43ed984587c939d02fba5316bf5c0df6eYing Wang * Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu) 6b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 7b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is free software; you can redistribute it and/or modify it 8b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * under the terms of the GNU General Public License as published by the Free 9b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Software Foundation; either version 2 of the License, or (at your option) 10b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any later version. 11b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 12b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is distributed in the hope that it will be useful, but WITHOUT 13b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * more details. 16b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 17b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * You should have received a copy of the GNU General Public License along 18b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * with this program; if not, write to the Free Software Foundation, Inc., 19b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 21b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopackage proguard.classfile.util; 22b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 23b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.ClassConstants; 24b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 25b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 26b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/** 27b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Utility methods for working with access flags. For convenience, this class 28b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * defines access levels, in ascending order: <code>PRIVATE</code>, 29b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * <code>PACKAGE_VISIBLE</code>, <code>PROTECTED</code>, and <code>PUBLIC</code>. 30b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 31b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @author Eric Lafortune 32b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 33b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopublic class AccessUtil 34b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato{ 35b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static final int PRIVATE = 0; 36b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static final int PACKAGE_VISIBLE = 1; 37b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static final int PROTECTED = 2; 38b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static final int PUBLIC = 3; 39b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 40b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 41b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // The mask of access flags. 42b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static final int ACCESS_MASK = 43b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_PUBLIC | 44b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_PRIVATE | 45b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassConstants.INTERNAL_ACC_PROTECTED; 46b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 47b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 48b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 49b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns the corresponding access level of the given access flags. 50b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param accessFlags the internal access flags. 51b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @return the corresponding access level: <code>PRIVATE</code>, 52b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * <code>PACKAGE_VISIBLE</code>, <code>PROTECTED</code>, or 53b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * <code>PUBLIC</code>. 54b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 55b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static int accessLevel(int accessFlags) 56b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 57b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato switch (accessFlags & ACCESS_MASK) 58b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 59b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato case ClassConstants.INTERNAL_ACC_PRIVATE: return PRIVATE; 60b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato default: return PACKAGE_VISIBLE; 61b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato case ClassConstants.INTERNAL_ACC_PROTECTED: return PROTECTED; 62b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato case ClassConstants.INTERNAL_ACC_PUBLIC: return PUBLIC; 63b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 64b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 65b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 66b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 67b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 68b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns the corresponding access flags of the given access level. 69b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param accessLevel the access level: <code>PRIVATE</code>, 70b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * <code>PACKAGE_VISIBLE</code>, <code>PROTECTED</code>, 71b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * or <code>PUBLIC</code>. 72b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @return the corresponding internal access flags, the internal access 73b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * flags as a logical bit mask of <code>INTERNAL_ACC_PRIVATE</code>, 74b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * <code>INTERNAL_ACC_PROTECTED</code>, and 75b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * <code>INTERNAL_ACC_PUBLIC</code>. 76b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 77b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static int accessFlags(int accessLevel) 78b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 79b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato switch (accessLevel) 80b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 81b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato case PRIVATE: return ClassConstants.INTERNAL_ACC_PRIVATE; 82b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato default: return 0; 83b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato case PROTECTED: return ClassConstants.INTERNAL_ACC_PROTECTED; 84b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato case PUBLIC: return ClassConstants.INTERNAL_ACC_PUBLIC; 85b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 86b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 87b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 88b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 89b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 90b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Replaces the access part of the given access flags. 91b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param accessFlags the internal access flags. 92b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @param accessFlags the new internal access flags. 93b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 94b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static int replaceAccessFlags(int accessFlags, int newAccessFlags) 95b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 96b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // A private class member should not be explicitly final. 97b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (newAccessFlags == ClassConstants.INTERNAL_ACC_PRIVATE) 98b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 99b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato accessFlags &= ~ClassConstants.INTERNAL_ACC_FINAL; 100b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 101b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 102b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return (accessFlags & ~ACCESS_MASK) | 103b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato (newAccessFlags & ACCESS_MASK); 104b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 105b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato} 106