com.liferay.portal.kernel.util.InstanceFactory Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library 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 library 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.
*/
package com.liferay.portal.kernel.util;
import java.lang.reflect.Constructor;
/**
* @author Brian Wing Shun Chan
*/
public class InstanceFactory {
public static Object newInstance(ClassLoader classLoader, String className)
throws Exception {
return newInstance(
classLoader, className, (Class[])null, (Object[])null);
}
public static Object newInstance(
ClassLoader classLoader, String className, Class parameterType,
Object argument)
throws Exception {
return newInstance(
classLoader, className, new Class[] {parameterType},
new Object[] {argument});
}
public static Object newInstance(
ClassLoader classLoader, String className,
Class[] parameterTypes, Object[] arguments)
throws Exception {
if (classLoader == null) {
Thread currentThread = Thread.currentThread();
classLoader = currentThread.getContextClassLoader();
if (classLoader == null) {
classLoader = ClassLoader.getSystemClassLoader();
}
}
Class clazz = classLoader.loadClass(className);
if ((parameterTypes != null) && (arguments != null) &&
(parameterTypes.length > 0) && (arguments.length > 0) &&
(parameterTypes.length == arguments.length)) {
Constructor constructor = clazz.getConstructor(parameterTypes);
return constructor.newInstance(arguments);
}
return clazz.newInstance();
}
public static Object newInstance(String className) throws Exception {
return newInstance(null, className);
}
public static Object newInstance(
String className, Class parameterType, Object argument)
throws Exception {
return newInstance(
null, className, new Class[] {parameterType},
new Object[] {argument});
}
public static Object newInstance(
String className, Class[] parameterTypes, Object[] arguments)
throws Exception {
return newInstance(null, className, parameterTypes, arguments);
}
}