/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2012 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;
import proguard.classfile.ClassPool;
import proguard.classfile.util.ClassUtil;
import proguard.classfile.visitor.ClassVersionSetter;
import java.io.IOException;
import java.util.*;
/**
* This class sets the target version on program classes.
*
* @author Eric Lafortune
*/
public class Targeter
{
private final Configuration configuration;
/**
* Creates a new Targeter to set the target version on program classes
* according to the given configuration.
*/
public Targeter(Configuration configuration)
{
this.configuration = configuration;
}
/**
* Sets the target version on classes in the given program class pool.
*/
public void execute(ClassPool programClassPool) throws IOException
{
Set newerClassVersions = configuration.warn != null ? null : new HashSet();
programClassPool.classesAccept(new ClassVersionSetter(configuration.targetClassVersion,
newerClassVersions));
if (newerClassVersions != null &&
newerClassVersions.size() > 0)
{
System.err.print("Warning: some classes have more recent versions (");
Iterator iterator = newerClassVersions.iterator();
while (iterator.hasNext())
{
Integer classVersion = (Integer)iterator.next();
System.err.print(ClassUtil.externalClassVersion(classVersion.intValue()));
if (iterator.hasNext())
{
System.err.print(",");
}
}
System.err.println(")");
System.err.println(" than the target version ("+ClassUtil.externalClassVersion(configuration.targetClassVersion)+").");
if (!configuration.ignoreWarnings)
{
System.err.println(" If you are sure this is not a problem,");
System.err.println(" you could try your luck using the '-ignorewarnings' option.");
throw new IOException("Please correct the above warnings first.");
}
}
}
}