1 /*

     2  * CDDL HEADER START

     3  *

     4  * The contents of this file are subject to the terms of the

     5  * Common Development and Distribution License (the "License").

     6  * You may not use this file except in compliance with the License.

     7  *

     8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

     9  * or http://www.opensolaris.org/os/licensing.

    10  * See the License for the specific language governing permissions

    11  * and limitations under the License.

    12  *

    13  * When distributing Covered Code, include this CDDL HEADER in each

    14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

    15  * If applicable, add the following below this CDDL HEADER, with the

    16  * fields enclosed by brackets "[]" replaced with your own identifying

    17  * information: Portions Copyright [yyyy] [name of copyright owner]

    18  *

    19  * CDDL HEADER END

    20  */

    21 

    22 /*

    23  * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.

    24  */

    25 

    26 package com.oracle.solaris.vp.panel.common.control;

    27 

    28 import java.util.List;

    29 

    30 /**

    31  * The {@code NavigationErrorHandler} class chooses the best path to re-navigate

    32  * to on navigation error.  If no {@link Control}s were started as a result of

    33  * the failed navigation, then the navigation is considered a complete failure

    34  * and a navigation back to the previous path is scheduled asynchronously.

    35  * Otherwise, a navigation to the current path is scheduled, which will cause

    36  * any path returned by {@link Navigator#getCurrentControl the current

    37  * Control}'s {@link Control#getForwardingPath} method to be followed.

    38  */

    39 public class NavigationErrorHandler implements NavigationListener {

    40     //

    41     // NavigationListener methods

    42     //

    43 

    44     @Override

    45     public void navigationStarted(NavigationStartEvent e) {

    46     }

    47 

    48     @Override

    49     public void navigationStopped(NavigationStopEvent event) {

    50 	if (!event.getNavigationSuccessful()) {

    51 	    Navigator navigator = event.getSource();

    52 

    53 	    boolean equal = false;

    54 	    Navigable[] last = event.getPreviousPath();

    55 	    List<Control> current = navigator.getPath();

    56 	    if (last.length == current.size()) {

    57 		equal = true;

    58 		for (int i = 0; i < last.length; i++) {

    59 		    if (!Navigable.Util.equals(last[i], current.get(i))) {

    60 			equal = false;

    61 			break;

    62 		    }

    63 		}

    64 	    }

    65 

    66 	    // Only re-navigate if the last path differs from the current path

    67 	    if (!equal) {

    68                 // If any Controls were started as a result of this navigation,

    69                 // assume it was successful enough to stay where we are.

    70                 // Otherwise, go back.

    71 		if (event.getStarted().isEmpty()) {

    72 		    // Go back

    73 		    navigator.goToAsync(true, null, last);

    74 		} else {

    75 		    // Navigate to the current path, which will forward to the

    76 		    // current Control's getForwardingPath, if any

    77 		    navigator.goToAsync(true, navigator.getCurrentControl());

    78 		}

    79 	    }

    80 	}

    81     }

    82 }