feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/java/nio/channels/spi/AsynchronousChannelProvider.java

@@ -0,0 +1,245 @@
+/*
+ * Copyright (c) 2007, 2013, 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 java.nio.channels.spi;
+
+import java.nio.channels.*;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.ServiceLoader;
+import java.util.ServiceConfigurationError;
+import java.util.concurrent.*;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/**
+ * Service-provider class for asynchronous channels.
+ *
+ * <p> An asynchronous channel provider is a concrete subclass of this class that
+ * has a zero-argument constructor and implements the abstract methods specified
+ * below.  A given invocation of the Java virtual machine maintains a single
+ * system-wide default provider instance, which is returned by the {@link
+ * #provider() provider} method.  The first invocation of that method will locate
+ * the default provider as specified below.
+ *
+ * <p> All of the methods in this class are safe for use by multiple concurrent
+ * threads.  </p>
+ *
+ * @since 1.7
+ */
+
+public abstract class AsynchronousChannelProvider {
+    private static Void checkPermission() {
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null)
+            sm.checkPermission(new RuntimePermission("asynchronousChannelProvider"));
+        return null;
+    }
+    private AsynchronousChannelProvider(Void ignore) { }
+
+    /**
+     * Initializes a new instance of this class.
+     *
+     * @throws  SecurityException
+     *          If a security manager has been installed and it denies
+     *          {@link RuntimePermission}<tt>("asynchronousChannelProvider")</tt>
+     */
+    protected AsynchronousChannelProvider() {
+        this(checkPermission());
+    }
+
+    // lazy initialization of default provider
+    private static class ProviderHolder {
+        static final AsynchronousChannelProvider provider = load();
+
+        private static AsynchronousChannelProvider load() {
+            return AccessController
+                .doPrivileged(new PrivilegedAction<AsynchronousChannelProvider>() {
+                    public AsynchronousChannelProvider run() {
+                        AsynchronousChannelProvider p;
+                        p = loadProviderFromProperty();
+                        if (p != null)
+                            return p;
+                        p = loadProviderAsService();
+                        if (p != null)
+                            return p;
+                        return sun.nio.ch.DefaultAsynchronousChannelProvider.create();
+                    }});
+        }
+
+        private static AsynchronousChannelProvider loadProviderFromProperty() {
+            String cn = System.getProperty("java.nio.channels.spi.AsynchronousChannelProvider");
+            if (cn == null)
+                return null;
+            try {
+                Class<?> c = Class.forName(cn, true,
+                                           ClassLoader.getSystemClassLoader());
+                return (AsynchronousChannelProvider)c.newInstance();
+            } catch (ClassNotFoundException x) {
+                throw new ServiceConfigurationError(null, x);
+            } catch (IllegalAccessException x) {
+                throw new ServiceConfigurationError(null, x);
+            } catch (InstantiationException x) {
+                throw new ServiceConfigurationError(null, x);
+            } catch (SecurityException x) {
+                throw new ServiceConfigurationError(null, x);
+            }
+        }
+
+        private static AsynchronousChannelProvider loadProviderAsService() {
+            ServiceLoader<AsynchronousChannelProvider> sl =
+                ServiceLoader.load(AsynchronousChannelProvider.class,
+                                   ClassLoader.getSystemClassLoader());
+            Iterator<AsynchronousChannelProvider> i = sl.iterator();
+            for (;;) {
+                try {
+                    return (i.hasNext()) ? i.next() : null;
+                } catch (ServiceConfigurationError sce) {
+                    if (sce.getCause() instanceof SecurityException) {
+                        // Ignore the security exception, try the next provider
+                        continue;
+                    }
+                    throw sce;
+                }
+            }
+        }
+    }
+
+    /**
+     * Returns the system-wide default asynchronous channel provider 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><p> If the system property
+     *   <tt>java.nio.channels.spi.AsynchronousChannelProvider</tt> is defined
+     *   then it is taken to be the fully-qualified name of a concrete provider class.
+     *   The class is loaded and instantiated; if this process fails then an
+     *   unspecified error is thrown.  </p></li>
+     *
+     *   <li><p> If a provider class has been installed in a jar file that is
+     *   visible to the system class loader, and that jar file contains a
+     *   provider-configuration file named
+     *   <tt>java.nio.channels.spi.AsynchronousChannelProvider</tt> in the resource
+     *   directory <tt>META-INF/services</tt>, then the first class name
+     *   specified in that file is taken.  The class is loaded and
+     *   instantiated; if this process fails then an unspecified error is
+     *   thrown.  </p></li>
+     *
+     *   <li><p> Finally, if no provider has been specified by any of the above
+     *   means then the system-default provider class is instantiated and the
+     *   result is returned.  </p></li>
+     *
+     * </ol>
+     *
+     * <p> Subsequent invocations of this method return the provider that was
+     * returned by the first invocation.  </p>
+     *
+     * @return  The system-wide default AsynchronousChannel provider
+     */
+    public static AsynchronousChannelProvider provider() {
+        return ProviderHolder.provider;
+    }
+
+    /**
+     * Constructs a new asynchronous channel group with a fixed thread pool.
+     *
+     * @param   nThreads
+     *          The number of threads in the pool
+     * @param   threadFactory
+     *          The factory to use when creating new threads
+     *
+     * @return  A new asynchronous channel group
+     *
+     * @throws  IllegalArgumentException
+     *          If {@code nThreads <= 0}
+     * @throws  IOException
+     *          If an I/O error occurs
+     *
+     * @see AsynchronousChannelGroup#withFixedThreadPool
+     */
+    public abstract AsynchronousChannelGroup
+        openAsynchronousChannelGroup(int nThreads, ThreadFactory threadFactory) throws IOException;
+
+    /**
+     * Constructs a new asynchronous channel group with the given thread pool.
+     *
+     * @param   executor
+     *          The thread pool
+     * @param   initialSize
+     *          A value {@code >=0} or a negative value for implementation
+     *          specific default
+     *
+     * @return  A new asynchronous channel group
+     *
+     * @throws  IOException
+     *          If an I/O error occurs
+     *
+     * @see AsynchronousChannelGroup#withCachedThreadPool
+     */
+    public abstract AsynchronousChannelGroup
+        openAsynchronousChannelGroup(ExecutorService executor, int initialSize) throws IOException;
+
+    /**
+     * Opens an asynchronous server-socket channel.
+     *
+     * @param   group
+     *          The group to which the channel is bound, or {@code null} to
+     *          bind to the default group
+     *
+     * @return  The new channel
+     *
+     * @throws  IllegalChannelGroupException
+     *          If the provider that created the group differs from this provider
+     * @throws  ShutdownChannelGroupException
+     *          The group is shutdown
+     * @throws  IOException
+     *          If an I/O error occurs
+     */
+    public abstract AsynchronousServerSocketChannel openAsynchronousServerSocketChannel
+        (AsynchronousChannelGroup group) throws IOException;
+
+    /**
+     * Opens an asynchronous socket channel.
+     *
+     * @param   group
+     *          The group to which the channel is bound, or {@code null} to
+     *          bind to the default group
+     *
+     * @return  The new channel
+     *
+     * @throws  IllegalChannelGroupException
+     *          If the provider that created the group differs from this provider
+     * @throws  ShutdownChannelGroupException
+     *          The group is shutdown
+     * @throws  IOException
+     *          If an I/O error occurs
+     */
+    public abstract AsynchronousSocketChannel openAsynchronousSocketChannel
+        (AsynchronousChannelGroup group) throws IOException;
+}