1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     4 

     5 package org.chromium.sdk;

     6 

     7 /**

     8  * Helper class for experimental support of LiveEdit feature. While regular API does not

     9  * support LiveEdit (not to break compatibility with existing clients), it gives access to extended

    10  * interfaces.

    11  * <p>

    12  * This class encapsulates all instanceofs/casts that are considered to be untrackable

    13  * in the main code and therefore harmful.

    14  */

    15 public class LiveEditExtension {

    16   /**

    17    * Casts script to the interface that supports updating source on remote VM.

    18    * @return extended interface or null if unsupported

    19    */

    20   public static UpdatableScript castToUpdatableScript(Script script) {

    21     if (script instanceof UpdatableScript == false) {

    22       return null;

    23     }

    24     return (UpdatableScript) script;

    25   }

    26 

    27   /**

    28    * Casts listener to interface that accepts LiveEdit-related events.

    29    * @return extended interface or null if unsupported

    30    */

    31   public static LiveEditDebugEventListener castToLiveEditListener(

    32       DebugEventListener debugEventListener) {

    33     if (debugEventListener instanceof LiveEditDebugEventListener == false) {

    34       return null;

    35     }

    36     return (LiveEditDebugEventListener) debugEventListener;

    37   }

    38 }