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/*
* 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.classfile.visitor;
import proguard.classfile.*;
import java.util.Set;
/**
* This <code>ClassVisitor</code> sets the version number of the program classes
* that it visits.
*
* @author Eric Lafortune
*/
public class ClassVersionSetter implements ClassVisitor
{
private final int classVersion;
private final Set newerClassVersions;
/**
* Creates a new ClassVersionSetter.
* @param classVersion the class version number.
*/
public ClassVersionSetter(int classVersion)
{
this(classVersion, null);
}
/**
* Creates a new ClassVersionSetter that also stores any newer class version
* numbers that it encounters while visiting program classes.
* @param classVersion the class version number.
* @param newerClassVersions the <code>Set</code> in which newer class
* version numbers can be collected.
*/
public ClassVersionSetter(int classVersion,
Set newerClassVersions)
{
this.classVersion = classVersion;
this.newerClassVersions = newerClassVersions;
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
if (programClass.u4version > classVersion &&
newerClassVersions != null)
{
newerClassVersions.add(new Integer(programClass.u4version));
}
programClass.u4version = classVersion;
}
public void visitLibraryClass(LibraryClass libraryClass)
{
// Library classes don't have version numbers.
}
}
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