001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.gui.datatransfer; 003 004import java.awt.datatransfer.UnsupportedFlavorException; 005import java.io.IOException; 006import java.util.Arrays; 007import java.util.Collection; 008 009import javax.swing.JComponent; 010import javax.swing.TransferHandler; 011 012import org.openstreetmap.josm.data.coor.EastNorth; 013import org.openstreetmap.josm.gui.MainApplication; 014import org.openstreetmap.josm.gui.datatransfer.importers.AbstractOsmDataPaster; 015import org.openstreetmap.josm.gui.layer.OsmDataLayer; 016import org.openstreetmap.josm.tools.JosmRuntimeException; 017import org.openstreetmap.josm.tools.Logging; 018import org.openstreetmap.josm.tools.bugreport.BugReport; 019 020/** 021 * A transfer handler class that allows you to manage a prioritized stack of transfer handlers. 022 * @author Michael Zangl 023 * @since 10881 024 */ 025public abstract class AbstractStackTransferHandler extends TransferHandler { 026 027 protected abstract Collection<AbstractOsmDataPaster> getSupportedPasters(); 028 029 @Override 030 public int getSourceActions(JComponent c) { 031 return COPY; 032 } 033 034 @Override 035 public boolean canImport(TransferSupport support) { 036 // import everything for now, only support copy. 037 for (AbstractOsmDataPaster df : getSupportedPasters()) { 038 if (df.supports(support)) { 039 return true; 040 } 041 } 042 return false; 043 } 044 045 @Override 046 public boolean importData(TransferSupport support) { 047 return importData(support, MainApplication.getLayerManager().getEditLayer(), null); 048 } 049 050 protected boolean importData(TransferSupport support, OsmDataLayer layer, EastNorth center) { 051 for (AbstractOsmDataPaster df : getSupportedPasters()) { 052 if (df.supports(support)) { 053 try { 054 if (Logging.isDebugEnabled()) { 055 Logging.debug("{0} pasting {1} at {2}", 056 df.getClass().getSimpleName(), Arrays.toString(support.getDataFlavors()), center); 057 } 058 if (df.importData(support, layer, center)) { 059 return true; 060 } 061 } catch (UnsupportedFlavorException | IOException e) { 062 Logging.warn(e); 063 } catch (JosmRuntimeException | IllegalArgumentException | IllegalStateException e) { 064 BugReport.intercept(e).put("paster", df).put("flavors", support::getDataFlavors).warn(); 065 } 066 } 067 } 068 return super.importData(support); 069 } 070}