--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/tools/jconsole/JConsoleContext.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2006-2007 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 com.sun.tools.jconsole;
+
+import javax.management.MBeanServerConnection;
+import java.beans.PropertyChangeListener;
+import javax.swing.event.SwingPropertyChangeSupport;
+
+/**
+ * {@code JConsoleContext} represents a JConsole connection to a target
+ * application.
+ * <p>
+ * {@code JConsoleContext} notifies any {@code PropertyChangeListeners}
+ * about the {@linkplain #CONNECTION_STATE_PROPERTY <i>ConnectionState</i>}
+ * property change to {@link ConnectionState#CONNECTED CONNECTED} and
+ * {@link ConnectionState#DISCONNECTED DISCONNECTED}.
+ * The {@code JConsoleContext} instance will be the source for
+ * any generated events.
+ * <p>
+ *
+ * @since 1.6
+ */
+public interface JConsoleContext {
+    /**
+     * The {@link ConnectionState ConnectionState} bound property name.
+     */
+    public static String CONNECTION_STATE_PROPERTY = "connectionState";
+
+    /**
+     * Values for the {@linkplain #CONNECTION_STATE_PROPERTY
+     * <i>ConnectionState</i>} bound property.
+     */
+    public enum ConnectionState {
+        /**
+         * The connection has been successfully established.
+         */
+        CONNECTED,
+        /**
+         * No connection present.
+         */
+        DISCONNECTED,
+        /**
+         * The connection is being attempted.
+         */
+        CONNECTING
+    }
+
+    /**
+     * Returns the {@link MBeanServerConnection MBeanServerConnection} for the
+     * connection to an application.  The returned
+     * {@code MBeanServerConnection} object becomes invalid when
+     * the connection state is changed to the
+     * {@link ConnectionState#DISCONNECTED DISCONNECTED} state.
+     *
+     * @return the {@code MBeanServerConnection} for the
+     * connection to an application.
+     */
+    public MBeanServerConnection getMBeanServerConnection();
+
+    /**
+     * Returns the current connection state.
+     * @return the current connection state.
+     */
+    public ConnectionState getConnectionState();
+
+    /**
+     * Add a {@link java.beans.PropertyChangeListener PropertyChangeListener}
+     * to the listener list.
+     * The listener is registered for all properties.
+     * The same listener object may be added more than once, and will be called
+     * as many times as it is added.
+     * If {@code listener} is {@code null}, no exception is thrown and
+     * no action is taken.
+     *
+     * @param listener  The {@code PropertyChangeListener} to be added
+     */
+    public void addPropertyChangeListener(PropertyChangeListener listener);
+
+    /**
+     * Removes a {@link java.beans.PropertyChangeListener PropertyChangeListener}
+     * from the listener list. This
+     * removes a {@code PropertyChangeListener} that was registered for all
+     * properties. If {@code listener} was added more than once to the same
+     * event source, it will be notified one less time after being removed. If
+     * {@code listener} is {@code null}, or was never added, no exception is
+     * thrown and no action is taken.
+     *
+     * @param listener the {@code PropertyChangeListener} to be removed
+     */
+    public void removePropertyChangeListener(PropertyChangeListener listener);
+}