/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.util;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.jboss.classloading.plugins.PackageInfo;
import org.jboss.classloading.plugins.WrappingClassLoader;
import org.jboss.logging.Logger;
// TODO Review
/**
* Reflection utility.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 1.2 $
*/
public class ClassLoading
{
// Constants -----------------------------------------------------
/** The log */
private static final Logger log = Logger.getLogger(ClassLoading.class);
/** The primitive classes */
private static final Map primitives;
// Attributes ----------------------------------------------------
// Static --------------------------------------------------------
static
{
primitives = new HashMap();
primitives.put("byte", Byte.TYPE);
primitives.put("boolean", Boolean.TYPE);
primitives.put("char", Character.TYPE);
primitives.put("short", Short.TYPE);
primitives.put("int", Integer.TYPE);
primitives.put("long", Long.TYPE);
primitives.put("float", Float.TYPE);
primitives.put("double", Double.TYPE);
}
public static Class loadClass(ClassLoader cl, String name) throws Exception
{
return loadClass(false, null, cl, name);
}
public static Class loadClass(boolean trace, String ctx, ClassLoader cl, String name) throws Exception
{
if (trace)
log.trace("Loading " + ctx + " class=" + name + " classloader=" + cl);
Class clazz = (Class) primitives.get(name);
try
{
if (clazz == null)
clazz = cl.loadClass(name);
}
catch (ClassNotFoundException e)
{
clazz = Class.forName(name);
}
if (trace)
log.trace("Loaded " + ctx + " " + clazz + " classloader=" + clazz.getClassLoader());
return clazz;
}
public static Set getClassLoaderSpecificPackages(ClassLoader cl)
{
Set packages = getClassLoaderPackages(cl);
packages.removeAll(getSystemPackages());
return packages;
}
private static Set systemPackages;
public static Set getSystemPackages()
{
if (systemPackages == null)
systemPackages = getClassLoaderPackages(ClassLoader.getSystemClassLoader());
return systemPackages;
}
public static Set getClassLoaderPackages(ClassLoader cl)
{
PackageInfo info;
if (cl instanceof PackageInfo)
info = (PackageInfo) cl;
else
info = new WrappingClassLoader(cl);
Package[] pkgs = info.getPackages();
HashSet packages = new HashSet();
for (int i = 0; i < pkgs.length; ++i)
packages.add(pkgs[i].getName());
return packages;
}
public static String getPackageName(String className)
{
int dot = className.lastIndexOf('/');
if (dot != -1)
return className.substring(0, dot);
else
return "";
}
// Constructors --------------------------------------------------
// Public --------------------------------------------------------
// Package protected ---------------------------------------------
// Protected -----------------------------------------------------
// Private -------------------------------------------------------
// Inner classes -------------------------------------------------
}