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2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
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0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
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0N/A */
0N/A
0N/Apackage sun.awt.datatransfer;
0N/A
0N/Aimport java.awt.datatransfer.DataFlavor;
0N/Aimport java.awt.datatransfer.Transferable;
0N/Aimport java.awt.datatransfer.UnsupportedFlavorException;
0N/A
0N/Aimport java.io.IOException;
0N/A
0N/Aimport java.util.HashMap;
0N/Aimport java.util.Iterator;
0N/Aimport java.util.Map;
0N/A
0N/A
0N/A/**
0N/A * Reads all of the data from the system Clipboard which the data transfer
0N/A * subsystem knows how to translate. This includes all text data, File Lists,
0N/A * Serializable objects, Remote objects, and properly registered, arbitrary
0N/A * data as InputStreams. The data is stored in byte format until requested
0N/A * by client code. At that point, the data is converted, if necessary, into
0N/A * the proper format to deliver to the application.
0N/A *
0N/A * This hybrid pre-fetch/delayed-rendering approach allows us to circumvent
0N/A * the API restriction that client code cannot lock the Clipboard to discover
0N/A * its formats before requesting data in a particular format, while avoiding
0N/A * the overhead of fully rendering all data ahead of time.
0N/A *
0N/A * @author David Mendenhall
0N/A * @author Danila Sinopalnikov
0N/A *
0N/A * @since 1.4 (appeared in modified form as FullyRenderedTransferable in 1.3.1)
0N/A */
0N/Apublic class ClipboardTransferable implements Transferable {
0N/A private final HashMap flavorsToData = new HashMap();
0N/A private DataFlavor[] flavors = new DataFlavor[0];
0N/A
0N/A private final class DataFactory {
0N/A final long format;
0N/A final byte[] data;
0N/A DataFactory(long format, byte[] data) {
0N/A this.format = format;
0N/A this.data = data;
0N/A }
0N/A
0N/A public Object getTransferData(DataFlavor flavor) throws IOException {
0N/A return DataTransferer.getInstance().
0N/A translateBytes(data, flavor, format,
0N/A ClipboardTransferable.this);
0N/A }
0N/A }
0N/A
0N/A public ClipboardTransferable(SunClipboard clipboard) {
0N/A
0N/A clipboard.openClipboard(null);
0N/A
0N/A try {
0N/A long[] formats = clipboard.getClipboardFormats();
0N/A
0N/A if (formats != null && formats.length > 0) {
0N/A // Since the SystemFlavorMap will specify many DataFlavors
0N/A // which map to the same format, we should cache data as we
0N/A // read it.
0N/A HashMap cached_data = new HashMap(formats.length, 1.0f);
0N/A
0N/A Map flavorsForFormats = DataTransferer.getInstance().
0N/A getFlavorsForFormats(formats, SunClipboard.flavorMap);
0N/A for (Iterator iter = flavorsForFormats.keySet().iterator();
0N/A iter.hasNext(); )
0N/A {
0N/A DataFlavor flavor = (DataFlavor)iter.next();
0N/A Long lFormat = (Long)flavorsForFormats.get(flavor);
0N/A
0N/A fetchOneFlavor(clipboard, flavor, lFormat, cached_data);
0N/A }
0N/A
0N/A flavors = DataTransferer.getInstance().
0N/A setToSortedDataFlavorArray(flavorsToData.keySet(),
0N/A flavorsForFormats);
0N/A }
0N/A } finally {
0N/A clipboard.closeClipboard();
0N/A }
0N/A }
0N/A
0N/A private boolean fetchOneFlavor(SunClipboard clipboard, DataFlavor flavor,
0N/A Long lFormat, HashMap cached_data)
0N/A {
0N/A if (!flavorsToData.containsKey(flavor)) {
0N/A long format = lFormat.longValue();
0N/A Object data = null;
0N/A
0N/A if (!cached_data.containsKey(lFormat)) {
0N/A try {
0N/A data = clipboard.getClipboardData(format);
0N/A } catch (IOException e) {
0N/A data = e;
0N/A } catch (Throwable e) {
0N/A e.printStackTrace();
0N/A }
0N/A
0N/A // Cache this data, even if it's null, so we don't have to go
0N/A // to native code again for this format.
0N/A cached_data.put(lFormat, data);
0N/A } else {
0N/A data = cached_data.get(lFormat);
0N/A }
0N/A
0N/A // Casting IOException to byte array causes ClassCastException.
0N/A // We should handle IOException separately - do not wrap them into
0N/A // DataFactory and report failure.
0N/A if (data instanceof IOException) {
0N/A flavorsToData.put(flavor, data);
0N/A return false;
0N/A } else if (data != null) {
0N/A flavorsToData.put(flavor, new DataFactory(format,
0N/A (byte[])data));
0N/A return true;
0N/A }
0N/A }
0N/A
0N/A return false;
0N/A }
0N/A
0N/A public DataFlavor[] getTransferDataFlavors() {
0N/A return (DataFlavor[])flavors.clone();
0N/A }
0N/A
0N/A public boolean isDataFlavorSupported(DataFlavor flavor) {
0N/A return flavorsToData.containsKey(flavor);
0N/A }
0N/A
0N/A public Object getTransferData(DataFlavor flavor)
0N/A throws UnsupportedFlavorException, IOException
0N/A {
0N/A if (!isDataFlavorSupported(flavor)) {
0N/A throw new UnsupportedFlavorException(flavor);
0N/A }
0N/A Object ret = flavorsToData.get(flavor);
0N/A if (ret instanceof IOException) {
0N/A // rethrow IOExceptions generated while fetching data
0N/A throw (IOException)ret;
0N/A } else if (ret instanceof DataFactory) {
0N/A // Now we can render the data
0N/A DataFactory factory = (DataFactory)ret;
0N/A ret = factory.getTransferData(flavor);
0N/A }
0N/A return ret;
0N/A }
0N/A
0N/A}