Java tutorial
/* * Copyright 2014-2016 CyberVision, Inc. * * 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 org.kaaproject.kaa.server.admin.client.util; import java.util.Collections; import java.util.Date; import java.util.List; import org.kaaproject.avro.ui.gwt.client.AvroUiResources; import org.kaaproject.avro.ui.gwt.client.AvroUiResources.AvroUiStyle; import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel; import org.kaaproject.kaa.common.dto.VersionDto; import org.kaaproject.kaa.common.dto.ctl.CTLSchemaScopeDto; import org.kaaproject.kaa.server.admin.client.KaaAdminResources; import org.kaaproject.kaa.server.admin.client.KaaAdminResources.KaaAdminStyle; import org.kaaproject.kaa.server.admin.client.KaaAdminResources.KaaTheme; import org.kaaproject.kaa.server.admin.client.i18n.KaaAdminConstants; import org.kaaproject.kaa.server.admin.client.i18n.KaaAdminMessages; import org.kaaproject.kaa.server.admin.client.mvp.view.dialog.MessageDialog; import org.kaaproject.kaa.server.admin.client.mvp.view.dialog.UnauthorizedSessionDialog; import org.kaaproject.kaa.server.admin.shared.services.KaaAdminServiceException; import org.kaaproject.kaa.server.admin.shared.services.ServiceErrorCode; import com.google.gwt.core.client.GWT; import com.google.gwt.http.client.Response; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException; import com.google.gwt.user.client.rpc.StatusCodeException; public class Utils { private static final int MAX_ERROR_LINE_LENGTH = 200; public static final KaaAdminResources resources = GWT.create(KaaAdminResources.class); public static final KaaAdminConstants constants = GWT.create(KaaAdminConstants.class); public static final KaaAdminMessages messages = GWT.create(KaaAdminMessages.class); public static final AvroUiResources avroUiResources = GWT.create(AvroUiResources.class); public static final KaaTheme kaaTheme = resources.kaaTheme(); public static final KaaAdminStyle kaaAdminStyle = resources.kaaAdminStyle(); public static final AvroUiStyle avroUiStyle = avroUiResources.avroUiStyle(); private static final DateTimeFormat simpleDateFormat = DateTimeFormat.getFormat("MM/dd/yyyy"); private static final DateTimeFormat simpleDateTimeFormat = DateTimeFormat.getFormat("MM/dd/yyyy h:mm a"); private static final int INCORRECT_IDX = -1; private static UnauthorizedSessionDialog unauthorizedSessionDialog; public static void injectKaaStyles() { kaaTheme.ensureInjected(); kaaAdminStyle.ensureInjected(); avroUiStyle.ensureInjected(); } public static void handleException(Throwable caught, HasErrorMessage hasErrorMessage) { handleException(caught, hasErrorMessage, null); } public static void handleException(Throwable caught, HasErrorMessage hasErrorMessage, ErrorMessageCustomizer errorMessageCustomizer) { boolean handled = false; if (caught instanceof StatusCodeException) { StatusCodeException sce = (StatusCodeException) caught; if (sce.getStatusCode() == Response.SC_UNAUTHORIZED) { onUnauthorized(); handled = true; } else if (sce.getStatusCode() == 0) { handleNetworkConnectionError(); handled = true; } } else if (caught instanceof IncompatibleRemoteServiceException) { MessageDialog.showMessageDialog(AlertPanel.Type.ERROR, constants.incompatibleRemoteService(), messages.incompatibleRemoteService()); handled = true; } if (!handled) { String message = parseErrorMessage(caught, errorMessageCustomizer); String[] lines = message.split("\r\n|\r|\n"); if (lines.length > 1 || (lines.length == 1 && lines[0].length() >= MAX_ERROR_LINE_LENGTH)) { MessageDialog.showMessageDialog(AlertPanel.Type.ERROR, constants.errorTitle(), message); } else { hasErrorMessage.setErrorMessage(message); } } } public static void handleNetworkConnectionError() { MessageDialog.showMessageDialog(AlertPanel.Type.ERROR, constants.serverIsUnreachable(), messages.serverIsUnreacheableMessage()); } public static String parseErrorMessage(Throwable caught) { return parseErrorMessage(caught, null); } private static String parseErrorMessage(Throwable caught, ErrorMessageCustomizer errorMessageCustomizer) { if (errorMessageCustomizer != null) { return errorMessageCustomizer.customizeErrorMessage(caught); } else if (caught instanceof KaaAdminServiceException) { ServiceErrorCode errorCode = ((KaaAdminServiceException) caught).getErrorCode(); String message = constants.getString(errorCode.getResKey()); if (errorCode.showErrorMessage()) { message += caught.getLocalizedMessage(); } return message; } else { return caught.getLocalizedMessage(); } } private static void onUnauthorized() { if (unauthorizedSessionDialog == null || !unauthorizedSessionDialog.isShowing()) { unauthorizedSessionDialog = new UnauthorizedSessionDialog(new UnauthorizedSessionDialog.Listener() { @Override public void onLogin() { Window.open(Window.Location.getPath(), "_blank", ""); } @Override public void onIgnore() { // do nothing } }); unauthorizedSessionDialog.center(); unauthorizedSessionDialog.show(); } } public static String millisecondsToDateString(long millis) { return simpleDateFormat.format(new Date(millis)); } public static String millisecondsToDateTimeString(long millis) { return simpleDateTimeFormat.format(new Date(millis)); } public static boolean validateEmail(String mail) { boolean result = false; if (mail != null && mail.length() != 0) { if (mail.indexOf('@') != INCORRECT_IDX && mail.indexOf('.') != INCORRECT_IDX) { result = true; } } return result; } public static <T extends VersionDto> T getMaxSchemaVersions(List<T> schemas) { if (schemas != null && !schemas.isEmpty()) { return Collections.max(schemas); } else { return null; } } public static boolean isNotBlank(String string) { return string != null && string.length() > 0; } public static boolean isBlank(String string) { return string == null || string.length() == 0; } public static String getCtlScopeString(CTLSchemaScopeDto scope) { switch (scope) { case APPLICATION: return constants.scopeApplication(); case SYSTEM: return constants.scopeSystem(); case TENANT: return constants.scopeTenant(); default: return "Unknown"; } } public static String getCtlScopeTitleString(CTLSchemaScopeDto scope) { switch (scope) { case APPLICATION: return constants.scopeApplicationTitle(); case SYSTEM: return constants.scopeSystemTitle(); case TENANT: return constants.scopeTenantTitle(); default: return "Unknown"; } } public static String getSchemaIdFromUrl(String path) { String[] pathArray = path.split("&"); return pathArray[pathArray.length - 1].split("=")[1]; } public static String getEndpointGroupIdFromUrl(String path) { return path.split("&")[1].split("=")[1]; } /** * Abbreviates a long string using ellipsis. * * @param text The string to abbreviate * @param maxLength The maximum length of the resulting string * * @return The abbreviated string */ public static String abbreviateText(String text, int maxLength) { return (text != null && text.length() > maxLength) ? text.substring(0, maxLength) + "..." : text; } }