Java tutorial
/** * Copyright (c) 2011-2012, Thilo Planz. All rights reserved. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package v7cr.vaadin; import java.io.OutputStream; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.List; import java.util.Map; import org.vaadin.easyuploads.MultiUploadHandler; import org.vaadin.easyuploads.MultiUpload.FileDetail; import com.vaadin.terminal.PaintException; import com.vaadin.terminal.PaintTarget; import com.vaadin.terminal.StreamVariable; import com.vaadin.ui.AbstractComponent; /** * Server side component for the VMultiUpload widget. Pretty much hacked up * together to test new Receiver support in the GWT terminal. */ @SuppressWarnings("serial") // @com.vaadin.ui.ClientWidget(org.vaadin.easyuploads.client.ui.VMultiUpload.class) public class V7MultiUpload extends AbstractComponent { List<FileDetail> pendingFiles = new ArrayList<FileDetail>(); private MultiUploadHandler receiver; StreamVariable streamVariable = new StreamVariable() { public void streamingStarted(StreamingStartEvent event) { final FileDetail next = getPendingFileNames().iterator().next(); receiver.streamingStarted(new StreamingStartEvent() { public String getMimeType() { return next.getMimeType(); } public String getFileName() { return next.getFileName(); } public long getContentLength() { return next.getContentLength(); } public long getBytesReceived() { return 0; } public void disposeStreamVariable() { } }); } public void streamingFinished(final StreamingEndEvent event) { final FileDetail next = getPendingFileNames().iterator().next(); receiver.streamingFinished(new StreamingEndEvent() { public String getMimeType() { return next.getMimeType(); } public String getFileName() { return next.getFileName(); } public long getContentLength() { return next.getContentLength(); } public long getBytesReceived() { return event.getBytesReceived(); } }); pendingFiles.remove(0); } public void streamingFailed(StreamingErrorEvent event) { receiver.streamingFailed(event); } public void onProgress(StreamingProgressEvent event) { receiver.onProgress(event); } public boolean listenProgress() { return true; } public boolean isInterrupted() { return false; } public OutputStream getOutputStream() { return receiver.getOutputStream(); } }; private boolean ready; public void setHandler(MultiUploadHandler receiver) { this.receiver = receiver; } @Override public void paintContent(PaintTarget target) throws PaintException { super.paintContent(target); target.addVariable(this, "realTarget", streamVariable); target.addVariable(this, "target", "http://0.0.0.0:80888/upload/vaadin"); if (ready) { target.addAttribute("ready", true); ready = false; } target.addAttribute("buttoncaption", getButtonCaption()); } @Override public void changeVariables(Object source, Map<String, Object> variables) { super.changeVariables(source, variables); if (variables.containsKey("filequeue")) { String[] filequeue = (String[]) variables.get("filequeue"); List<FileDetail> newFiles = new ArrayList<FileDetail>(filequeue.length); for (String string : filequeue) { newFiles.add(new FileDetail(string)); } receiver.filesQueued(newFiles); pendingFiles.addAll(newFiles); requestRepaint(); ready = true; } } public Collection<FileDetail> getPendingFileNames() { return Collections.unmodifiableCollection(pendingFiles); } public void setButtonCaption(String buttonCaption) { this.buttonCaption = buttonCaption; } public String getButtonCaption() { return buttonCaption; } private String buttonCaption = "..."; }