/*
* Copyright 2009-2015 the original author or authors.
*
* 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.jdal.vaadin;
import org.springframework.context.ApplicationContext;
import com.vaadin.server.DefaultUIProvider;
import com.vaadin.server.UIClassSelectionEvent;
import com.vaadin.server.UICreateEvent;
import com.vaadin.server.UIProvider;
import com.vaadin.ui.UI;
import com.vaadin.util.CurrentInstance;
/**
* {@link UIProvider} implementation that look for UIs in a {@link ApplicationContext}.
* Delegate url mapping to a {@link UiRequestMapping} instance.
*
* @author Jose Luis Martin
* @since 2.0
*/
public class SpringUIProvider extends DefaultUIProvider {
private UiRequestMapping uiMapping;
@Override
public UI createInstance(UICreateEvent event) {
ApplicationContext ctx = VaadinUtils.getApplicationContext();
CurrentInstance.set(UIid.class, new UIid(event.getUiId()));
UI ui = this.uiMapping.getUi(event.getRequest());
if (ui == null)
ui = ctx.getBean(event.getUIClass());
CurrentInstance.set(UIid.class, null);
return ui;
}
@Override
public Class<? extends UI> getUIClass(UIClassSelectionEvent event) {
checkUiRequestMapping();
Class<?extends UI> clazz = this.uiMapping.getUiClass(event.getRequest());
return clazz != null ? clazz : super.getUIClass(event);
}
private void checkUiRequestMapping() {
if (this.uiMapping != null)
return;
ApplicationContext ctx = VaadinUtils.getApplicationContext();
String names[] = ctx.getBeanNamesForType(UiRequestMapping.class);
if (names.length > 0) {
this.uiMapping = ctx.getBean(names[0], UiRequestMapping.class);
}
else {
this.uiMapping = new UrlBeanNameUiMapping();
((UrlBeanNameUiMapping) this.uiMapping).init(ctx);
}
}
/**
* @return the uiMapping
*/
public UiRequestMapping getUiMapping() {
return uiMapping;
}
/**
* @param uiMapping the uiMapping to set
*/
public void setUiMapping(UiRequestMapping uiMapping) {
this.uiMapping = uiMapping;
}
}