| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare |
| * |
| * 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.peephole; |
| |
| import proguard.classfile.ProgramClass; |
| import proguard.classfile.util.SimplifiedVisitor; |
| import proguard.classfile.visitor.ClassVisitor; |
| |
| /** |
| * This ClassVisitor inlines the direct subclasses into the program classes |
| * that it visits, whenever possible. |
| * |
| * @see ClassMerger |
| * @author Eric Lafortune |
| */ |
| public class VerticalClassMerger |
| extends SimplifiedVisitor |
| implements ClassVisitor |
| { |
| private final boolean allowAccessModification; |
| private final boolean mergeInterfacesAggressively; |
| private final ClassVisitor extraClassVisitor; |
| |
| |
| /** |
| * Creates a new VerticalClassMerger. |
| * @param allowAccessModification specifies whether the access modifiers |
| * of classes can be changed in order to |
| * merge them. |
| * @param mergeInterfacesAggressively specifies whether interfaces may |
| * be merged aggressively. |
| */ |
| public VerticalClassMerger(boolean allowAccessModification, |
| boolean mergeInterfacesAggressively) |
| { |
| this(allowAccessModification, mergeInterfacesAggressively, null); |
| } |
| |
| |
| /** |
| * Creates a new VerticalClassMerger. |
| * @param allowAccessModification specifies whether the access modifiers |
| * of classes can be changed in order to |
| * merge them. |
| * @param mergeInterfacesAggressively specifies whether interfaces may |
| * be merged aggressively. |
| * @param extraClassVisitor an optional extra visitor for all |
| * merged classes. |
| */ |
| public VerticalClassMerger(boolean allowAccessModification, |
| boolean mergeInterfacesAggressively, |
| ClassVisitor extraClassVisitor) |
| { |
| this.allowAccessModification = allowAccessModification; |
| this.mergeInterfacesAggressively = mergeInterfacesAggressively; |
| this.extraClassVisitor = extraClassVisitor; |
| } |
| |
| |
| // Implementations for ClassVisitor. |
| |
| public void visitProgramClass(ProgramClass programClass) |
| { |
| // Try inlining all immediate subclasses into this class. |
| programClass.subclassesAccept(new ClassMerger(programClass, |
| allowAccessModification, |
| mergeInterfacesAggressively, |
| extraClassVisitor)); |
| } |
| } |