com.vaadin.portlet.LegacyVaadinPortlet Maven / Gradle / Ivy

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/*
 * Copyright (C) 2000-2024 Vaadin Ltd
 *
 * This program is available under Vaadin Commercial License and Service Terms.
 *
 * See  for the full
 * license.
 */

package com.vaadin.portlet;

import javax.portlet.PortletConfig;
import javax.portlet.PortletException;
import javax.portlet.PortletRequest;

import com.vaadin.server.LegacyApplication;
import com.vaadin.server.LegacyApplicationUIProvider;
import com.vaadin.server.ServiceException;
import com.vaadin.server.ServletPortletHelper;
import com.vaadin.server.SessionInitEvent;
import com.vaadin.util.ReflectTools;

@SuppressWarnings("deprecation")
public class LegacyVaadinPortlet extends VaadinPortlet {

    private static final LegacyApplicationUIProvider PROVIDER = new LegacyApplicationUIProvider() {
        @Override
        protected LegacyApplication createApplication() {
            VaadinPortlet portlet = VaadinPortlet.getCurrent();
            if (portlet instanceof LegacyVaadinPortlet) {
                LegacyVaadinPortlet legacyPortlet = (LegacyVaadinPortlet) portlet;
                PortletRequest request = VaadinPortletService
                        .getCurrentPortletRequest();
                if (legacyPortlet.shouldCreateApplication(request)) {
                    try {
                        return legacyPortlet.getNewApplication(request);
                    } catch (PortletException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
            return null;
        }
    };

    @Override
    public void init(PortletConfig portletConfig) throws PortletException {
        super.init(portletConfig);

        getService().addSessionInitListener((SessionInitEvent event) -> {
            try {
                onVaadinSessionStarted(
                        (VaadinPortletRequest) event.getRequest(),
                        (VaadinPortletSession) event.getSession());
            } catch (PortletException e) {
                throw new ServiceException(e);
            }
        });
    }

    protected Class getApplicationClass()
            throws ClassNotFoundException {
        try {
            return ServletPortletHelper.getLegacyApplicationClass(getService());
        } catch (ServiceException e) {
            throw new RuntimeException(e);
        }
    }

    protected LegacyApplication getNewApplication(PortletRequest request)
            throws PortletException {
        try {
            Class applicationClass = getApplicationClass();
            return ReflectTools.createInstance(applicationClass);
        } catch (Exception e) {
            throw new PortletException(e);
        }
    }

    private void onVaadinSessionStarted(VaadinPortletRequest request,
            VaadinPortletSession session) throws PortletException {
        session.addUIProvider(PROVIDER);
    }

    protected boolean shouldCreateApplication(PortletRequest request) {
        return true;
    }
}