/*
* Copyright (c) 2001, 2006, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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// NewInstance.java - create a new instance of a class by name.
// http://www.saxproject.org
// Written by Edwin Goei, edwingo@apache.org
// and by David Brownell, dbrownell@users.sourceforge.net
// NO WARRANTY! This class is in the Public Domain.
// $Id: NewInstance.java,v 1.2 2005/06/10 03:50:50 jeffsuttor Exp $
package org.xml.sax.helpers;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
/**
* Create a new instance of a class by name.
*
* <blockquote>
* <em>This module, both source code and documentation, is in the
* Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
* See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
* for further information.
* </blockquote>
*
* <p>This class contains a static method for creating an instance of a
* class from an explicit class name. It tries to use the thread's context
* ClassLoader if possible and falls back to using
* Class.forName(String).</p>
*
* <p>This code is designed to compile and run on JDK version 1.1 and later
* including versions of Java 2.</p>
*
* @author Edwin Goei, David Brownell
* @version 2.0.1 (sax2r2)
*/
class NewInstance {
private static final String DEFAULT_PACKAGE = "com.sun.org.apache.xerces.internal";
/**
* Creates a new instance of the specified class name
*
* Package private so this code is not exposed at the API level.
*/
static Object newInstance (ClassLoader classLoader, String className)
throws ClassNotFoundException, IllegalAccessException,
InstantiationException
{
// make sure we have access to restricted packages
boolean internal = false;
if (System.getSecurityManager() != null) {
if (className != null && className.startsWith(DEFAULT_PACKAGE)) {
internal = true;
}
}
Class driverClass;
if (classLoader == null || internal) {
driverClass = Class.forName(className);
} else {
driverClass = classLoader.loadClass(className);
}
return driverClass.newInstance();
}
}