Java tutorial
/******************************************************************************* * Copyright (c) 2014 SAP AG or an SAP affiliate company. All rights reserved. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ package com.sap.dirigible.ide.workspace.ui.commands; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import org.eclipse.core.commands.AbstractHandler; import org.eclipse.core.commands.ExecutionEvent; import org.eclipse.core.commands.ExecutionException; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IFolder; import org.eclipse.core.resources.IResource; import org.eclipse.core.runtime.CoreException; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.ui.handlers.HandlerUtil; import com.sap.dirigible.ide.logging.Logger; public class UploadHandler extends AbstractHandler { private static final String DO_YOU_WANT_TO_OVERRIDE_IT = Messages.UploadHandler_DO_YOU_WANT_TO_OVERRIDE_IT; private static final String FILE_S_ALREADY_EXISTS = Messages.UploadHandler_FILE_S_ALREADY_EXISTS; private static final String UPLOAD_FILE = Messages.UploadHandler_UPLOAD_FILE; private static final String CANNOT_DELETE_FILE = Messages.UploadHandler_CANNOT_DELETE_FILE; private static final String CANNOT_CLOSE_INPUT_STREAM_TO_AN_UPLOADED_FILE = Messages.UploadHandler_CANNOT_CLOSE_INPUT_STREAM_TO_AN_UPLOADED_FILE; private static final String UPLOAD_ERROR = Messages.UploadHandler_UPLOAD_ERROR; private static final String REASON = Messages.UploadHandler_REASON; private static final String CANNOT_UPLOAD = Messages.UploadHandler_CANNOT_UPLOAD; private static final String CANNOT_SAVE_UPLOADED_FILE = Messages.UploadHandler_CANNOT_SAVE_UPLOADED_FILE; private static final Logger logger = Logger.getLogger(UploadHandler.class); @Override public Object execute(ExecutionEvent event) throws ExecutionException { FileDialog dlg = new FileDialog(HandlerUtil.getActiveShell(event), SWT.TITLE | SWT.MULTI); dlg.setAutoUpload(true); dlg.setText(UPLOAD_FILE); dlg.open(); IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getCurrentSelection(event); Object firstElement = selection.getFirstElement(); if (firstElement instanceof IFolder) { IFolder folder = (IFolder) firstElement; String fileName = null; for (String fullFileName : dlg.getFileNames()) { fileName = fullFileName.substring(fullFileName.lastIndexOf(File.separatorChar) + 1); IFile file = folder.getFile(fileName); InputStream in = null; try { in = new FileInputStream(fullFileName); if (file.exists()) { boolean overrideIt = MessageDialog.openConfirm(null, String.format(FILE_S_ALREADY_EXISTS, file.getName()), DO_YOU_WANT_TO_OVERRIDE_IT); if (overrideIt) { file.setContents(in, IResource.FORCE, null); } } else { file.create(in, false, null); } } catch (Exception e) { logger.error(CANNOT_SAVE_UPLOADED_FILE + fileName, e); MessageDialog.openError(null, UPLOAD_ERROR, CANNOT_UPLOAD + fileName + REASON + e.getMessage()); cleanUp(folder, fileName); } finally { if (in != null) { try { in.close(); } catch (IOException e) { logger.warn(CANNOT_CLOSE_INPUT_STREAM_TO_AN_UPLOADED_FILE, e); } } } } } return null; } private void cleanUp(IFolder folder, String fileName) { IFile file = folder.getFile(fileName); try { file.delete(true, null); } catch (CoreException e) { logger.warn(CANNOT_DELETE_FILE, e); } } }