/* * ProGuard -- shrinking, optimization, obfuscation, and preverification * of Java bytecode. * * Copyright (c) 2002-2009 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.classfile.util; import proguard.classfile.*; import proguard.classfile.visitor.*; import java.util.*; /** * This ClassVisitor links all corresponding non-private methods in the class * hierarchies of all visited classes. Visited classes are typically all class * files that are not being subclassed. Chains of links that have been created * in previous invocations are merged with new chains of links, in order to * create a consistent set of chains. *
* As a MemberVisitor, it links all corresponding class members that it visits, * including fields and private class members. *
* Class initialization methods and constructors are always ignored.
*
* @author Eric Lafortune
*/
public class MethodLinker
extends SimplifiedVisitor
implements ClassVisitor,
MemberVisitor
{
// An object that is reset and reused every time.
// The map: [class member name+' '+descriptor - class member info]
private final Map memberMap = new HashMap();
// Implementations for ClassVisitor.
public void visitAnyClass(Clazz clazz)
{
// Collect all non-private members in this class hierarchy.
clazz.hierarchyAccept(true, true, true, false,
new AllMethodVisitor(
new MemberAccessFilter(0, ClassConstants.INTERNAL_ACC_PRIVATE,
this)));
// Clean up for the next class hierarchy.
memberMap.clear();
}
// Implementations for MemberVisitor.
public void visitAnyMember(Clazz clazz, Member member)
{
// Get the class member's name and descriptor.
String name = member.getName(clazz);
String descriptor = member.getDescriptor(clazz);
// Special cases: