1 /*
   2  * Copyright (c) 2014, 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 sun.awt.datatransfer;
  27 
  28 import sun.awt.AppContext;
  29 import sun.datatransfer.DesktopDatatransferService;
  30 
  31 import java.awt.EventQueue;
  32 import java.awt.datatransfer.DataFlavor;
  33 import java.awt.datatransfer.FlavorMap;
  34 import java.util.LinkedHashSet;
  35 import java.util.function.Supplier;
  36 
  37 /**
  38  * Provides desktop services to the datatransfer module according to
  39  * {@code DesktopDatatransferService} interface.
  40  *
  41  * @author Petr Pchelko
  42  * @since 9
  43  */
  44 public class DesktopDatatransferServiceImpl implements DesktopDatatransferService {
  45 
  46     private static final Object FLAVOR_MAP_KEY = new Object();
  47 
  48     @Override
  49     public void invokeOnEventThread(Runnable r) {
  50         EventQueue.invokeLater(r);
  51     }
  52 
  53     @Override
  54     public String getDefaultUnicodeEncoding() {
  55         DataTransferer dataTransferer = DataTransferer.getInstance();
  56         if (dataTransferer != null) {
  57             return dataTransferer.getDefaultUnicodeEncoding();
  58         }
  59         return null;
  60     }
  61 
  62     @Override
  63     public FlavorMap getFlavorMap(Supplier<FlavorMap> supplier) {
  64         AppContext context = AppContext.getAppContext();
  65         FlavorMap fm = (FlavorMap) context.get(FLAVOR_MAP_KEY);
  66         if (fm == null) {
  67             fm = supplier.get();
  68             context.put(FLAVOR_MAP_KEY, fm);
  69         }
  70         return fm;
  71     }
  72 
  73     @Override
  74     public boolean isDesktopPresent() {
  75         return true;
  76     }
  77 
  78     @Override
  79     public LinkedHashSet<DataFlavor> getPlatformMappingsForNative(String nat) {
  80         DataTransferer instance = DataTransferer.getInstance();
  81         return instance != null ? instance.getPlatformMappingsForNative(nat) : new LinkedHashSet<>();
  82     }
  83 
  84     @Override
  85     public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
  86         DataTransferer instance = DataTransferer.getInstance();
  87         return instance != null ? instance.getPlatformMappingsForFlavor(df) : new LinkedHashSet<>();
  88     }
  89 
  90     @Override
  91     public void registerTextFlavorProperties(String nat, String charset, String eoln, String terminators) {
  92         DataTransferer instance = DataTransferer.getInstance();
  93         if (instance != null) {
  94             instance.registerTextFlavorProperties(nat, charset, eoln, terminators);
  95         }
  96     }
  97 }