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/* gnu.classpath.tools.SerialVer
Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath 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, or (at your option)
any later version.
GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
package gnu.classpath.tools.serialver;
import gnu.classpath.tools.getopt.ClasspathToolParser;
import gnu.classpath.tools.getopt.FileArgumentCallback;
import gnu.classpath.tools.getopt.Option;
import gnu.classpath.tools.getopt.OptionException;
import gnu.classpath.tools.getopt.Parser;
import java.io.File;
import java.io.ObjectStreamClass;
import java.net.URL;
import java.net.URLClassLoader;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.StringTokenizer;
/**
* This class is an implementation of the `serialver' program. Any number of
* class names can be passed as arguments, and the serial version unique
* identitfier for each class will be printed in a manner suitable for cuting
* and pasting into a Java source file.
*/
public class SerialVer
{
// List of classes to load.
ArrayList classes = new ArrayList();
// The class path to use.
String classpath;
// FIXME: taken from ClassLoader, should share it.
private static void addFileURL(ArrayList list, String file)
{
try
{
list.add(new File(file).toURL());
}
catch(java.net.MalformedURLException x)
{
}
}
private ClassLoader getClassLoader()
{
// FIXME: this code is taken from ClassLoader.
// We should share it somewhere.
URL[] urls;
if (classpath == null)
urls = new URL[0];
else
{
StringTokenizer tok = new StringTokenizer(classpath,
File.pathSeparator, true);
ArrayList list = new ArrayList();
while (tok.hasMoreTokens())
{
String s = tok.nextToken();
if (s.equals(File.pathSeparator))
addFileURL(list, "."); //$NON-NLS-1$
else
{
addFileURL(list, s);
if (tok.hasMoreTokens())
{
// Skip the separator.
tok.nextToken();
// If the classpath ended with a separator,
// append the current directory.
if (!tok.hasMoreTokens())
addFileURL(list, "."); //$NON-NLS-1$
}
}
}
urls = new URL[list.size()];
urls = (URL[]) list.toArray(urls);
}
return new URLClassLoader(urls);
}
private void printMessage(String format, String klass)
{
System.err.println(MessageFormat.format(format, new Object[] { klass }));
}
public void run(String[] args)
{
Parser p = new ClasspathToolParser("serialver", true) //$NON-NLS-1$
{
protected void validate() throws OptionException
{
if (classes.isEmpty())
throw new OptionException(Messages.getString("SerialVer.NoClassesSpecd")); //$NON-NLS-1$
}
};
p.setHeader(Messages.getString("SerialVer.HelpHeader")); //$NON-NLS-1$
p.add(new Option(Messages.getString("SerialVer.5"), Messages.getString("SerialVer.ClasspathHelp"), "PATH") //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
{
public void parsed(String argument) throws OptionException
{
if (classpath != null)
throw new OptionException(Messages.getString("SerialVer.DupClasspath")); //$NON-NLS-1$
classpath = argument;
}
});
p.parse(args, new FileArgumentCallback()
{
public void notifyFile(String fileArgument) throws OptionException
{
classes.add(fileArgument);
}
});
ClassLoader loader = getClassLoader();
Iterator it = classes.iterator();
while (it.hasNext())
{
String name = (String) it.next();
try
{
Class clazz = loader.loadClass(name);
ObjectStreamClass osc = ObjectStreamClass.lookup(clazz);
if (osc != null)
System.out.println(clazz.getName() + ": " //$NON-NLS-1$
+ "static final long serialVersionUID = " //$NON-NLS-1$
+ osc.getSerialVersionUID() + "L;"); //$NON-NLS-1$
else
printMessage(Messages.getString("SerialVer.ClassNotSerial"), name); //$NON-NLS-1$
}
catch (ClassNotFoundException e)
{
printMessage(Messages.getString("SerialVer.ClassNotFound"), name); //$NON-NLS-1$
}
}
}
public static void main(String[] args)
{
new SerialVer().run(args);
}
}
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