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Java example source code file (FtpClientProvider.java)
The FtpClientProvider.java Java example source code/* * Copyright (c) 2009, 2011, 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 sun.net.ftp; import java.security.AccessController; import java.security.PrivilegedAction; import java.util.ServiceConfigurationError; //import java.util.ServiceLoader; /** * Service provider class for FtpClient. * Sub-classes of FtpClientProvider provide an implementation of {@link FtpClient} * and associated classes. Applications do not normally use this class directly. * See {@link #provider() } for how providers are found and loaded. * * @since 1.7 */ public abstract class FtpClientProvider { /** * Creates a FtpClient from this provider. * * @return The created {@link FtpClient}. */ public abstract FtpClient createFtpClient(); private static final Object lock = new Object(); private static FtpClientProvider provider = null; /** * Initializes a new instance of this class. * * @throws SecurityException if a security manager is installed and it denies * {@link RuntimePermission}<tt>("ftpClientProvider") */ protected FtpClientProvider() { SecurityManager sm = System.getSecurityManager(); if (sm != null) { sm.checkPermission(new RuntimePermission("ftpClientProvider")); } } private static boolean loadProviderFromProperty() { String cm = System.getProperty("sun.net.ftpClientProvider"); if (cm == null) { return false; } try { Class<?> c = Class.forName(cm, true, null); provider = (FtpClientProvider) c.newInstance(); return true; } catch (ClassNotFoundException | IllegalAccessException | InstantiationException | SecurityException x) { throw new ServiceConfigurationError(x.toString()); } } private static boolean loadProviderAsService() { // Iterator<FtpClientProvider> i = // ServiceLoader.load(FtpClientProvider.class, // ClassLoader.getSystemClassLoader()).iterator(); // // while (i.hasNext()) { // try { // provider = i.next(); // return true; // } catch (ServiceConfigurationError sce) { // if (sce.getCause() instanceof SecurityException) { // // Ignore, try next provider, if any // continue; // } // throw sce; // } // } return false; } /** * Returns the system wide default FtpClientProvider for this invocation of * the Java virtual machine. * * <p> The first invocation of this method locates the default provider * object as follows: </p> * * <ol> * * <li> Other Java examples (source code examples)Here is a short list of links related to this Java FtpClientProvider.java source code file: |
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