Java tutorial
/* * Copyright 2004 - 2013 Wayne Grant * 2013 - 2016 Kai Kramer * * This file is part of KeyStore Explorer. * * KeyStore Explorer is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * KeyStore Explorer is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with KeyStore Explorer. If not, see <http://www.gnu.org/licenses/>. */ package net.sf.keystore_explorer.gui.dnd; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.Transferable; import java.awt.datatransfer.UnsupportedFlavorException; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.commons.io.IOUtils; /** * Transferable for KeyStore entries. <code>DataFlavor.javaFileListFlavor</code> * and <code>DataFlavor.stringFlavor</code> are supported. * */ public class KeyStoreEntryTransferable implements Transferable { private DragEntry dragEntry; /** * Construct KeyStoreEntryTransferable. * * @param dragEntry * Drag entry */ public KeyStoreEntryTransferable(DragEntry dragEntry) { this.dragEntry = dragEntry; } /** * Get supported transfer data flavors. * * @return Supported data flavors */ @Override public DataFlavor[] getTransferDataFlavors() { return new DataFlavor[] { DataFlavor.javaFileListFlavor, DataFlavor.stringFlavor }; } /** * Is supplied data flavor supported? * * @param dataFlavor * Data flavor * @return True if it is */ @Override public boolean isDataFlavorSupported(DataFlavor dataFlavor) { return (dataFlavor == DataFlavor.javaFileListFlavor) || (dataFlavor == DataFlavor.stringFlavor); } /** * Get transfer data. * * @param dataFlavor * Data flavor * @return Transfer data * @throws UnsupportedFlavorException * If the requested data flavor is not supported * @throws IOException * If an I/O problem occurred */ @Override public Object getTransferData(DataFlavor dataFlavor) throws UnsupportedFlavorException, IOException { if (!isDataFlavorSupported(dataFlavor)) { throw new UnsupportedFlavorException(dataFlavor); } if (dataFlavor == DataFlavor.javaFileListFlavor) { String tempDir = System.getProperty("java.io.tmpdir"); File tmpFile = new File(tempDir, dragEntry.getFileName()); tmpFile.deleteOnExit(); FileOutputStream fos = null; try { fos = new FileOutputStream(tmpFile); fos.write(dragEntry.getContent()); } finally { IOUtils.closeQuietly(fos); } List<File> list = new ArrayList<File>(); list.add(tmpFile); return list; } else { return dragEntry.getContentString(); } } }