| /* |
| * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package org.xml.sax.helpers; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.Objects; |
| |
| /** |
| * Create a new instance of a class by name. |
| * |
| * |
| * <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"; |
| private static final String DEFAULT_CLASS = "com.sun.org.apache.xerces.internal.parsers.SAXParser"; |
| /** |
| * Creates a new instance of the specified class name |
| * |
| * Package private so this code is not exposed at the API level. |
| */ |
| @SuppressWarnings("removal") |
| static <T> T newInstance (Class<T> type, ClassLoader loader, String clsName) |
| throws ClassNotFoundException, IllegalAccessException, |
| InstantiationException |
| { |
| ClassLoader classLoader = Objects.requireNonNull(loader); |
| String className = Objects.requireNonNull(clsName); |
| |
| // Instantiate directly for the SAX default parser |
| if (className.equals(DEFAULT_CLASS)) { |
| return type.cast(new com.sun.org.apache.xerces.internal.parsers.SAXParser()); |
| } |
| |
| // 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); |
| } |
| |
| try { |
| return type.cast(driverClass.getConstructor().newInstance()); |
| } catch (NoSuchMethodException | SecurityException | InvocationTargetException ex) { |
| throw new InstantiationException(ex.getMessage()); |
| } |
| } |
| |
| } |