Java tutorial
/** * * geo-platform * Rich webgis framework * http://geo-platform.org * ==================================================================== * * Copyright (C) 2008-2019 geoSDI Group (CNR IMAA - Potenza - ITALY). * * This program 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. 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 General Public License * for more details. You should have received a copy of the GNU General * Public License along with this program. If not, see http://www.gnu.org/licenses/ * * ==================================================================== * * Linking this library statically or dynamically with other modules is * making a combined work based on this library. Thus, the terms and * conditions of the GNU General Public License cover the whole combination. * * As a special exception, the copyright holders of this library give you permission * to link this library with independent modules to produce an executable, regardless * of the license terms of these independent modules, and to copy and distribute * the resulting executable under terms of your choice, provided that you also meet, * for each linked independent module, the terms and conditions of the license of * that module. An independent module is a module which is not derived from or * based on this library. If you modify this library, you may extend this exception * to your version of the library, but you are not obligated to do so. If you do not * wish to do so, delete this exception statement from your version. */ package org.geosdi.geoplatform.gui.client.widget.fileupload; import com.extjs.gxt.ui.client.event.ButtonEvent; import com.extjs.gxt.ui.client.event.SelectionListener; import com.extjs.gxt.ui.client.widget.VerticalPanel; import com.extjs.gxt.ui.client.widget.button.Button; import com.google.gwt.core.client.GWT; import com.google.gwt.user.client.ui.FileUpload; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; import com.google.gwt.user.client.ui.FormPanel.SubmitEvent; import com.google.gwt.user.client.ui.Hidden; import org.geosdi.geoplatform.gui.client.event.AbstractUploadEvent; import org.geosdi.geoplatform.gui.client.i18n.BasicWidgetConstants; import org.geosdi.geoplatform.gui.client.i18n.buttons.ButtonsConstants; import org.geosdi.geoplatform.gui.client.widget.SearchStatus.EnumSearchStatus; import org.geosdi.geoplatform.gui.client.widget.progressbar.GeoPlatformProgressBar; import org.geosdi.geoplatform.gui.configuration.message.GeoPlatformMessage; import org.geosdi.geoplatform.gui.impl.map.event.GPLoginEvent; import org.geosdi.geoplatform.gui.impl.view.LayoutManager; import org.geosdi.geoplatform.gui.puregwt.GPHandlerManager; import org.geosdi.geoplatform.gui.shared.util.GPSharedUtils; import java.util.logging.Logger; /** * @author Nazzareno Sileno - CNR IMAA geoSDI Group * @email nazzareno.sileno@geosdi.org */ public class GPFileUploader { protected final static Logger logger = Logger.getLogger(""); private FormPanel formPanel = new FormPanel(); private FileUpload fileUpload; private Button buttonSubmit; private String htmlResult; private final AbstractUploadEvent uploadEvent; private UploaderProgressBar uploaderProgressBar; private VerticalPanel verticalPanel; private Hidden queryParameter; public GPFileUploader(String uploadAction, AbstractUploadEvent uploadEvent, GPExtensions... extensions) { this.createUploadComponent(uploadAction, extensions); this.uploadEvent = uploadEvent; } public FormPanel getComponent() { return this.formPanel; } private void createUploadComponent(String uploadAction, final GPExtensions... extensions) { uploaderProgressBar = new UploaderProgressBar(); formPanel.setAction(GWT.getModuleBaseURL() + uploadAction); formPanel.setEncoding(FormPanel.ENCODING_MULTIPART); formPanel.setMethod(FormPanel.METHOD_POST); this.verticalPanel = new VerticalPanel(); this.queryParameter = new Hidden(); this.verticalPanel.add(queryParameter); formPanel.setWidget(verticalPanel); fileUpload = new FileUpload(); fileUpload.setName("uploadFormElement"); verticalPanel.add(fileUpload); buttonSubmit = new Button(ButtonsConstants.INSTANCE.submitText(), new SelectionListener<ButtonEvent>() { @Override public void componentSelected(ButtonEvent ce) { uploaderProgressBar.show("Uploading..."); formPanel.submit(); if ((fileUpload.getFilename() != null) && isValidExtensions(fileUpload.getFilename(), extensions)) { LayoutManager.getInstance().getStatusMap() .setBusy(BasicWidgetConstants.INSTANCE.GPFileUploader_uploadInProgressText()); } } }); verticalPanel.add(buttonSubmit); // Add an event handler to the form. formPanel.addSubmitHandler(new FormPanel.SubmitHandler() { @Override public void onSubmit(SubmitEvent event) { // This event is fired just before the form is submitted. We can // take this opportunity to perform validation if (!isValidExtensions(fileUpload.getFilename(), extensions)) { uploaderProgressBar.hide(); LayoutManager.getInstance().getStatusMap().setStatus( BasicWidgetConstants.INSTANCE.GPFileUploader_failedStatusText(), EnumSearchStatus.STATUS_NO_SEARCH.toString()); GeoPlatformMessage.errorMessage( BasicWidgetConstants.INSTANCE.GPFileUploader_failedErrorMessageTitleText(), BasicWidgetConstants.INSTANCE.GPFileUploader_failedErrorKindFileBodyText()); event.cancel(); formPanel.reset(); } } }); formPanel.addSubmitCompleteHandler(new FormPanel.SubmitCompleteHandler() { @Override public void onSubmitComplete(SubmitCompleteEvent event) { // When the form submission is successfully completed, // this event is fired. Assuming the service returned a // response of type text/html, we can get the result text here // (see the FormPanel documentation for further explanation) htmlResult = event.getResults(); System.out.println("HTML Result: " + htmlResult); //Execute this code only if the session is still alive if (htmlResult.contains("Session Timeout")) { GPHandlerManager.fireEvent(new GPLoginEvent(null)); } else if (!htmlResult.contains("HTTP ERROR")) { formPanel.reset(); htmlResult = htmlResult.replaceAll("<pre>", ""); htmlResult = htmlResult.replaceAll("</pre>", ""); htmlResult = htmlResult .replaceAll("<pre style=\"word-wrap: break-word; white-space: pre-wrap;\">", ""); if (GPSharedUtils.isNotEmpty(htmlResult)) { // logger.info("HTMLResult: " + htmlResult); uploadEvent.setResult(htmlResult); GPHandlerManager.fireEvent(uploadEvent); //done.enable(); //mapPreviewWidget.drawAoiOnMap(wkt); LayoutManager.getInstance().getStatusMap().setStatus( BasicWidgetConstants.INSTANCE.GPFileUploader_successStatusText(), EnumSearchStatus.STATUS_SEARCH.toString()); } else { LayoutManager.getInstance().getStatusMap().setStatus( BasicWidgetConstants.INSTANCE.GPFileUploader_failedStatusText(), EnumSearchStatus.STATUS_NO_SEARCH.toString()); } } else { GeoPlatformMessage.errorMessage( BasicWidgetConstants.INSTANCE.GPFileUploader_failedErrorMessageTitleText(), BasicWidgetConstants.INSTANCE.GPFileUploader_failedErrorGenericBodyText()); LayoutManager.getInstance().getStatusMap().setStatus( BasicWidgetConstants.INSTANCE.GPFileUploader_failedStatusText(), EnumSearchStatus.STATUS_NO_SEARCH.toString()); } uploaderProgressBar.hide(); } }); } public void addParamToServletURL(String key, String value) { this.queryParameter.setName(key); this.queryParameter.setValue(value); } public boolean isValidExtensions(String fileName, GPExtensions... extensions) { for (GPExtensions gPExtensions : extensions) { if (fileName.toUpperCase().endsWith("." + gPExtensions.toString())) { return true; } } return false; } /** * @return the buttonSubmit */ public Button getButtonSubmit() { return buttonSubmit; } class UploaderProgressBar extends GeoPlatformProgressBar { protected UploaderProgressBar() { super(BasicWidgetConstants.INSTANCE.GPFileUploader_progressBarText(), Boolean.TRUE); } } }