org.glassfish.weld.util.Util Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2009-2014 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*
* Portions Copyright [2017] Payara Foundation and/or affiliates
*/
package org.glassfish.weld.util;
import org.glassfish.weld.ACLSingletonProvider;
import org.jboss.weld.bootstrap.api.SingletonProvider;
import org.jboss.weld.bootstrap.api.helpers.TCCLSingletonProvider;
/**
* Defines util methods for instantiating with weld
*/
public class Util {
/**
* Creates and returns a new instance of the specified class using a no-argument constructor
* @param
* @param className
* @throws InstantiationException
* @throws IllegalAccessException
* @return
*/
public static T newInstance(String className) {
try {
return Util.classForName(className).newInstance();
} catch (InstantiationException e) {
throw new IllegalArgumentException("Cannot instantiate instance of " + className + " with no-argument constructor", e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("Cannot instantiate instance of " + className + " with no-argument constructor", e);
}
}
/**
* Returns the actual class with the specified name
* @param
* @param name The full name of the class i.e. java.lang.String
* @return
*/
public static Class classForName(String name) {
try {
if (Thread.currentThread().getContextClassLoader() != null) {
Class c = Thread.currentThread().getContextClassLoader().loadClass(name);
@SuppressWarnings("unchecked")
Class clazz = (Class) c;
return clazz;
} else {
Class c = Class.forName(name);
@SuppressWarnings("unchecked")
Class clazz = (Class) c;
return clazz;
}
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Cannot load class for " + name, e);
} catch (NoClassDefFoundError e) {
throw new IllegalArgumentException("Cannot load class for " + name, e);
}
}
/**
* Starts the singleton provider for weld.
*
* This will be {@link ACLSingletonProvider}
*/
public static void initializeWeldSingletonProvider() {
SingletonProvider.initialize(new ACLSingletonProvider());
}
}