/*
* 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.jbpm.util;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.jbpm.JbpmException;
import org.jbpm.graph.def.ProcessDefinition;
import org.jbpm.instantiation.ProcessClassLoader;
/**
* provides centralized classloader lookup.
*/
public class ClassLoaderUtil {
public static Class loadClass(String className) {
try {
return getClassLoader().loadClass(className);
} catch (ClassNotFoundException e) {
throw new JbpmException("class not found '"+className+"'", e);
}
}
public static ClassLoader getClassLoader() {
// if this is made configurable, make sure it's done with the
// jvm system properties
// System.getProperty("jbpm.classloader")
// - 'jbpm'
// - 'context'
//
// or something like Thread.currentThread().getContextClassLoader();
return ClassLoaderUtil.class.getClassLoader();
}
public static InputStream getStream(String resource) {
return getClassLoader().getResourceAsStream(resource);
}
public static Properties getProperties(String resource) {
Properties properties = new Properties();
try {
properties.load(getStream(resource));
} catch (IOException e) {
throw new JbpmException("couldn't load properties file '"+resource+"'", e);
}
return properties;
}
/**
* searches the given resource, first on the root of the classpath and if not
* not found there, in the given directory.
public static InputStream getStream(String resource, String directory) {
InputStream is = getClassLoader().getResourceAsStream(resource);
if (is==null) {
is = getClassLoader().getResourceAsStream(directory+"/"+resource);
}
return is;
}
public static Properties getProperties(String resource, String directory) {
Properties properties = new Properties();
try {
properties.load(getStream(resource, directory));
} catch (IOException e) {
throw new JbpmException("couldn't load properties file '"+resource+"'", e);
}
return properties;
}
*/
public static ClassLoader getProcessClassLoader(ProcessDefinition processDefinition) {
return new ProcessClassLoader(ClassLoaderUtil.class.getClassLoader(), processDefinition);
}
}