de.unioninvestment.eai.portal.support.vaadin.context.UIContextProvider.java Source code

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Here is the source code for de.unioninvestment.eai.portal.support.vaadin.context.UIContextProvider.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 de.unioninvestment.eai.portal.support.vaadin.context;

import static java.util.Arrays.asList;

import java.util.Locale;

import javax.portlet.PortletContext;
import javax.portlet.PortletRequest;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.MessageSource;
import org.springframework.web.portlet.context.PortletApplicationContextUtils;

import com.vaadin.server.VaadinPortletService;
import com.vaadin.ui.UI;

import de.unioninvestment.eai.portal.support.vaadin.LiferayUI;

/**
 * Thread-safe {@link ContextProvider} that fetches the ApplicationContext from
 * the current PortletReq.
 * 
 * @author cmj
 * 
 */
public class UIContextProvider implements ContextProvider {

    /**
     * bersetzung von UI-Texten.
     * 
     * @param key
     *            der bersetzungsschlssel
     * @param args
     *            Parameter
     * @return die bersetzung gem der aktuellen Locale-Konfiguration
     */
    public String getMessage(String key, Object... args) {
        try {

            MessageSource messageSource = getBean(MessageSource.class);
            if (messageSource != null) {
                return messageSource.getMessage(key, args, getLocale());
            } else {
                return rawMessage(key, args);
            }
        } catch (IllegalStateException e) {
            return rawMessage(key, args);
        }
    }

    private String rawMessage(String key, Object... args) {
        return "#" + key + (args == null || args.length == 0 ? "" : asList(args));
    }

    @Override
    public Locale getLocale() {
        return UI.getCurrent().getLocale();
    }

    @Override
    public long getLiferayCommunityId() {
        return LiferayUI.getCurrent().getCommunityId();
    }

    /**
     * @param requiredType
     *            der bentigte Typ eines Beans
     * @return eine Instanz des Typs aus dem Spring ApplicationContext
     * @throws NoSuchBeanDefinitionException
     *             falls die Bean im Spring-Kontext nicht gefunden werden kann
     * @throws BeansException
     *             falls keine eindeutige Zuordnung getroffen werden kann
     * @throws IllegalStateException
     *             falls kein PortletRequest gefunden wird, an dem der Spring
     *             Context hngt
     */
    @Override
    public <T> T getBean(Class<T> requiredType) {
        return getSpringContext().getBean(requiredType);
    }

    @Override
    public ApplicationContext getSpringContext() {
        PortletRequest currentRequest = VaadinPortletService.getCurrentPortletRequest();
        if (currentRequest != null) {
            PortletContext pc = currentRequest.getPortletSession().getPortletContext();
            org.springframework.context.ApplicationContext springContext = PortletApplicationContextUtils
                    .getRequiredWebApplicationContext(pc);
            return springContext;

        } else {
            throw new IllegalStateException(
                    "Found no current portlet request. Did you subclass PortletApplication in your Vaadin Application?");
        }
    }
}