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