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13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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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
invokeOnEventThread(Runnable r)49     public void invokeOnEventThread(Runnable r) {
50         EventQueue.invokeLater(r);
51     }
52 
53     @Override
getDefaultUnicodeEncoding()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
getFlavorMap(Supplier<FlavorMap> supplier)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
isDesktopPresent()74     public boolean isDesktopPresent() {
75         return true;
76     }
77 
78     @Override
getPlatformMappingsForNative(String nat)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
getPlatformMappingsForFlavor(DataFlavor df)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
registerTextFlavorProperties(String nat, String charset, String eoln, String terminators)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 }
98