/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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 __redirected;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleClassLoader;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.modules.ModuleLoader;
/**
* Common utilities for redirected factories
*
* @author David M. Lloyd
* @authore Jason T. Greene
*/
public final class __RedirectedUtils {
static RuntimeException rethrowCause(Throwable t) throws Error {
try {
throw t.getCause();
} catch (Error e) {
throw e;
} catch (RuntimeException re) {
return re;
} catch (Throwable throwable) {
return new UndeclaredThrowableException(throwable);
}
}
static E wrapped(E e, Throwable orig) {
Throwable cause = orig.getCause();
if (cause != null) {
e.initCause(cause);
}
e.setStackTrace(orig.getStackTrace());
return e;
}
static Class extends T> loadProvider(ModuleIdentifier id, Class intf, ModuleLoader moduleLoader) {
return loadProvider(id, intf, moduleLoader, null);
}
static Class extends T> loadProvider(ModuleIdentifier id, Class intf, ModuleLoader moduleLoader, String name) {
Module module;
try {
module = moduleLoader.loadModule(id);
} catch (ModuleLoadException e) {
Module.getModuleLogger().providerUnloadable(id.toString(), null);
return null;
}
ModuleClassLoader classLoader = module.getClassLoader();
return loadProvider(intf, classLoader, name);
}
static Class extends T> loadProvider(Class intf, ClassLoader classLoader) {
return loadProvider(intf, classLoader, null);
}
static Class extends T> loadProvider(Class intf, ClassLoader classLoader, String name) {
List names = findProviderClassNames(intf, classLoader, name);
if (names.isEmpty()) {
Module.getModuleLogger().providerUnloadable("Not found", classLoader);
return null;
}
String clazzName = names.get(0);
try {
return classLoader.loadClass(clazzName).asSubclass(intf);
} catch (Exception ignore) {
Module.getModuleLogger().providerUnloadable(clazzName, classLoader);
return null;
}
}
static List> loadProviders(Class intf, ClassLoader classLoader) {
return loadProviders(intf, classLoader, null);
}
static List> loadProviders(Class intf, ClassLoader classLoader, String name) {
List names = findProviderClassNames(intf, classLoader, name);
if (names.size() < 1) {
Module.getModuleLogger().providerUnloadable("Not found", classLoader);
return Collections.emptyList();
}
List> classes = new ArrayList>();
for (String className : names) {
try {
classes.add(classLoader.loadClass(className).asSubclass(intf));
} catch (Exception ignore) {
Module.getModuleLogger().providerUnloadable(className, classLoader);
}
}
return classes;
}
static List findProviderClassNames(Class intf, ClassLoader loader, String name) {
if (name == null)
name = intf.getName();
final InputStream stream = loader.getResourceAsStream("META-INF/services/" + name);
if (stream == null)
return Collections.emptyList();
List list = new ArrayList();
try {
final BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
String line;
while ((line = readLine(reader)) != null) {
final int i = line.indexOf('#');
if (i != -1) {
line = line.substring(0, i);
}
line = line.trim();
if (line.length() == 0)
continue;
list.add(line);
}
} finally {
try {
stream.close();
} catch (IOException ignored) {
}
}
return list;
}
private static String readLine(final BufferedReader reader) {
try {
return reader.readLine();
} catch (IOException ignore) {
return null;
}
}
}