1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.javafx.scene.input;
  27 
  28 import javafx.scene.input.Clipboard;
  29 
  30 /**
  31  * Used to access internal methods of Clipboard.
  32  */
  33 public class ClipboardHelper {
  34 
  35     private static ClipboardAccessor clipboardAccessor;
  36 
  37     static {
  38         forceInit(Clipboard.class);
  39     }
  40 
  41     private ClipboardHelper() {
  42     }
  43 
  44     public static boolean contentPut(Clipboard clipboard) {
  45         return clipboardAccessor.contentPut(clipboard);
  46     }
  47 
  48     public static void setClipboardAccessor(final ClipboardAccessor newAccessor) {
  49         if (clipboardAccessor != null) {
  50             throw new IllegalStateException();
  51         }
  52 
  53         clipboardAccessor = newAccessor;
  54     }
  55 
  56     public interface ClipboardAccessor {
  57         boolean contentPut(Clipboard clipboard);
  58     }
  59 
  60     private static void forceInit(final Class<?> classToInit) {
  61         try {
  62             Class.forName(classToInit.getName(), true,
  63                     classToInit.getClassLoader());
  64         } catch (final ClassNotFoundException e) {
  65             throw new AssertionError(e);  // Can't happen
  66         }
  67     }
  68 }