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/*
* Copyright 2000-2022 Vaadin Ltd.
*
* 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.vaadin.server;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.vaadin.ui.LegacyWindow;
import com.vaadin.ui.UI;
/**
*
* @author Vaadin Ltd
* @since 7.0.0
*
* @deprecated As of 7.0. Used only to support LegacyApplication - will be
* removed when LegacyApplication support is removed.
*/
@Deprecated
public abstract class LegacyApplicationUIProvider extends UIProvider {
/**
* Ignore initial / and then get everything up to the next /
*/
private static final Pattern WINDOW_NAME_PATTERN = Pattern
.compile("^/?([^/]+).*");
@Override
public Class<? extends UI> getUIClass(UIClassSelectionEvent event) {
UI uiInstance = getUIInstance(event);
if (uiInstance != null) {
return uiInstance.getClass();
}
return null;
}
@Override
public UI createInstance(UICreateEvent event) {
return getUIInstance(event);
}
@Override
public String getTheme(UICreateEvent event) {
LegacyApplication application = getApplication();
if (application != null) {
return application.getTheme();
} else {
return null;
}
}
@Override
public String getPageTitle(UICreateEvent event) {
UI uiInstance = getUIInstance(event);
if (uiInstance != null) {
return uiInstance.getCaption();
} else {
return super.getPageTitle(event);
}
}
private UI getUIInstance(UIProviderEvent event) {
VaadinRequest request = event.getRequest();
String pathInfo = request.getPathInfo();
String name = null;
if (pathInfo != null && !pathInfo.isEmpty()) {
Matcher matcher = WINDOW_NAME_PATTERN.matcher(pathInfo);
if (matcher.matches()) {
// Skip the initial slash
name = matcher.group(1);
}
}
LegacyApplication application = getApplication();
if (application == null) {
return null;
}
LegacyWindow window = application.getWindow(name);
if (window != null) {
return window;
}
return application.getMainWindow();
}
/**
* Hack used to return existing LegacyWindow instances without regard for
* out-of-sync problems.
*
* @param event
* @return
*/
public UI getExistingUI(UIClassSelectionEvent event) {
UI uiInstance = getUIInstance(event);
if (uiInstance == null || uiInstance.getUIId() == -1) {
// Not initialized -> Let go through createUIInstance to make it
// initialized
return null;
} else {
UI.setCurrent(uiInstance);
return uiInstance;
}
}
private LegacyApplication getApplication() {
LegacyApplication application = VaadinSession.getCurrent()
.getAttribute(LegacyApplication.class);
if (application == null) {
application = createApplication();
if (application == null) {
return null;
}
VaadinSession.getCurrent().setAttribute(LegacyApplication.class,
application);
URL applicationUrl;
try {
applicationUrl = VaadinService.getCurrent()
.getApplicationUrl(VaadinService.getCurrentRequest());
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
application.doInit(applicationUrl);
}
if (application != null && !application.isRunning()) {
VaadinSession.getCurrent().setAttribute(LegacyApplication.class,
null);
// Run again without a current application
return getApplication();
}
return application;
}
protected abstract LegacyApplication createApplication();
}
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