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Diffstat (limited to 'src/proguard/optimize/evaluation/SimpleEnumClassChecker.java')
| -rw-r--r-- | src/proguard/optimize/evaluation/SimpleEnumClassChecker.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/proguard/optimize/evaluation/SimpleEnumClassChecker.java b/src/proguard/optimize/evaluation/SimpleEnumClassChecker.java new file mode 100644 index 0000000..1bd5008 --- /dev/null +++ b/src/proguard/optimize/evaluation/SimpleEnumClassChecker.java @@ -0,0 +1,74 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +package proguard.optimize.evaluation; + +import proguard.classfile.*; +import proguard.classfile.visitor.*; +import proguard.optimize.info.SimpleEnumMarker; + +/** + * This ClassVisitor marks all program classes that it visits as simple enums, + * if their methods qualify. + * + * @author Eric Lafortune + */ +public class SimpleEnumClassChecker +implements ClassVisitor +{ + //* + private static final boolean DEBUG = false; + /*/ + private static boolean DEBUG = System.getProperty("enum") != null; + //*/ + + + private final SimpleEnumMarker simpleEnumMarker = new SimpleEnumMarker(true); + private final MemberVisitor virtualMethodChecker = new MemberAccessFilter(0, + ClassConstants.ACC_PRIVATE | + ClassConstants.ACC_STATIC, + new MemberToClassVisitor( + new SimpleEnumMarker(false))); + + + // Implementations for ClassVisitor. + + public void visitLibraryClass(LibraryClass libraryClass) {} + + public void visitProgramClass(ProgramClass programClass) + { + // Does the class have the simple enum constructor? + if (programClass.findMethod(ClassConstants.METHOD_NAME_INIT, + ClassConstants.METHOD_TYPE_INIT_ENUM) != null) + { + if (DEBUG) + { + System.out.println("SimpleEnumClassChecker: ["+programClass.getName()+"] is a candidate simple enum, without extra fields"); + } + + // Mark it. + simpleEnumMarker.visitProgramClass(programClass); + + // However, unmark it again if it has any non-private, non-static + // methods. + programClass.methodsAccept(virtualMethodChecker); + } + } +}
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