mirror of git://gcc.gnu.org/git/gcc.git
100 lines
3.7 KiB
Java
100 lines
3.7 KiB
Java
/* RMIHashes.java --
|
|
Copyright (c) 1996, 1997, 1998, 1999, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package gnu.java.rmi.server;
|
|
|
|
import gnu.java.lang.CPStringBuilder;
|
|
|
|
import gnu.java.lang.reflect.TypeSignature;
|
|
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.DataOutputStream;
|
|
import java.lang.reflect.Method;
|
|
import java.security.MessageDigest;
|
|
|
|
public class RMIHashes
|
|
{
|
|
//There're other places using DigestOutputStream to generate hash in classpath, but I think the way I used
|
|
//here is more efficient, anyway, you can switch to DigestOutputStream by doing like "//or:" comments say.
|
|
|
|
//or:add this statement: private static final NullOutputStream nullOutputStream = new NullOutputStream ();
|
|
public static long getMethodHash(Method meth)
|
|
{
|
|
//Object Serialization Spec 8.3
|
|
try
|
|
{
|
|
MessageDigest md = MessageDigest.getInstance ("SHA");
|
|
//or:remove this statement: DigestOutputStream digest_out = new DigestOutputStream (nullOutputStream, md);
|
|
ByteArrayOutputStream digest_out = new ByteArrayOutputStream();
|
|
DataOutputStream data_out = new DataOutputStream (digest_out);
|
|
|
|
CPStringBuilder sbuf = new CPStringBuilder();
|
|
sbuf.append(meth.getName());
|
|
sbuf.append('(');
|
|
Class params[] = meth.getParameterTypes();
|
|
for(int i = 0; i < params.length; i++)
|
|
sbuf.append(TypeSignature.getEncodingOfClass(params[i]));
|
|
sbuf.append(')');
|
|
Class rcls = meth.getReturnType();
|
|
if(rcls != Void.TYPE)
|
|
sbuf.append(TypeSignature.getEncodingOfClass(rcls));
|
|
else
|
|
sbuf.append('V');
|
|
|
|
data_out.writeUTF (sbuf.toString());
|
|
data_out.flush();
|
|
data_out.close ();
|
|
|
|
md.update(digest_out.toByteArray()); //or:remove this statement
|
|
byte[] sha = md.digest ();
|
|
long result = 0;
|
|
int len = sha.length < 8 ? sha.length : 8;
|
|
for (int i=0; i < len; i++)
|
|
result += (long)(sha[i] & 0xFF) << (8 * i);
|
|
return result;
|
|
}catch(Exception _){
|
|
return -1L;
|
|
}
|
|
}
|
|
|
|
public static long getInterfaceHash(Class clazz)
|
|
{
|
|
return clazz.hashCode ();
|
|
}
|
|
}
|