--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/nio/ch/AbstractFuture.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2008-2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.nio.ch;
+
+import java.nio.channels.AsynchronousChannel;
+import java.util.concurrent.Future;
+
+/**
+ * Base implementation of Future used for asynchronous I/O
+ */
+
+abstract class AbstractFuture<V,A>
+    implements Future<V>
+{
+    private final AsynchronousChannel channel;
+    private final A attachment;
+
+    protected AbstractFuture(AsynchronousChannel channel, A attachment) {
+        this.channel = channel;
+        this.attachment = attachment;
+    }
+
+    final AsynchronousChannel channel() {
+        return channel;
+    }
+
+    final A attachment() {
+        return attachment;
+    }
+
+    /**
+     * Returns the result of the operation if it has completed successfully.
+     */
+    abstract V value();
+
+    /**
+     * Returns the exception if the operation has failed.
+     */
+    abstract Throwable exception();
+}