org.ripla.web.internal.services.RiplaEventDispatcher.java Source code

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Here is the source code for org.ripla.web.internal.services.RiplaEventDispatcher.java

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/*******************************************************************************
 * Copyright (c) 2012-2013 RelationWare, Benno Luthiger
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * RelationWare, Benno Luthiger
 ******************************************************************************/

package org.ripla.web.internal.services;

import java.util.Map;

import org.ripla.exceptions.NoControllerFoundException;
import org.ripla.interfaces.IRiplaEventDispatcher;
import org.ripla.web.Constants;
import org.ripla.web.RiplaApplication;
import org.ripla.web.interfaces.IBodyComponent;
import org.ripla.web.interfaces.IPluggable;
import org.ripla.web.internal.views.DefaultRiplaView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.vaadin.server.VaadinServlet;
import com.vaadin.server.VaadinServletService;
import com.vaadin.ui.UI;

/**
 * The event dispatcher implementation.
 * 
 * @author Luthiger
 */
public class RiplaEventDispatcher implements IRiplaEventDispatcher {
    private static final Logger LOG = LoggerFactory.getLogger(RiplaEventDispatcher.class);

    private transient IBodyComponent bodyComponent;
    private transient RiplaApplication application;

    /**
     * @param inBody
     *            {@link IBodyComponent}
     * @param inApplication
     *            {@link RiplaApplication}
     */
    public void setBodyComponent(final IBodyComponent inBody, final RiplaApplication inApplication) {
        bodyComponent = inBody;
        application = inApplication;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void dispatch(final Event inType, final Map<String, Object> inProperties) {

        switch (inType) {
        case LOAD_CONTROLLER:
            final Object lNext = inProperties.get(Constants.EVENT_PROPERTY_NEXT_CONTROLLER);
            LOG.debug("next task={}.", lNext); //$NON-NLS-1$
            try {
                bodyComponent.setContentView(bodyComponent.getContentComponent(lNext.toString()));
            } catch (final NoControllerFoundException exc) {
                handleNoTaskFound(exc, bodyComponent);
            }
            break;

        case LOAD_CONTEXT_MENU:
            final Object lContextMenuSet = inProperties.get(Constants.EVENT_PROPERTY_CONTEXT_MENU_ID);
            LOG.debug("Event: displaying context menu={}", lContextMenuSet); //$NON-NLS-1$
            bodyComponent.setContextMenu(lContextMenuSet.toString(),
                    ((Class<? extends IPluggable>) inProperties.get(Constants.EVENT_PROPERTY_CONTROLLER_ID)));
            break;

        case REFRESH:
            LOG.debug("Event: refresh body");
            bodyComponent.refreshBody();
            break;

        case REFRESH_SKIN:
            final Object lSkinID = inProperties.get(Constants.EVENT_PROPERTY_SKIN_ID);
            LOG.debug("Event: change skin to {}", lSkinID);
            application.changeSkin((String) lSkinID);
            break;

        case REFRESH_UI:
            LOG.debug("Event: refresh UI");
            application.refreshUI();
            break;

        case LOGOUT:
            LOG.debug("Event: logout");
            final UI lUI = application.getUI();
            lUI.getSession().close();
            lUI.getPage().setLocation(getAppLocation());
            break;

        default:
            break;
        }
    }

    private String getAppLocation() {
        return VaadinServlet.getCurrent().getServletContext().getContextPath()
                + VaadinServletService.getCurrentServletRequest().getServletPath();
    }

    private void handleNoTaskFound(final NoControllerFoundException inExc, final IBodyComponent inBody) {
        LOG.error("Configuration error:", inExc); //$NON-NLS-1$
        inBody.setContentView(new DefaultRiplaView(inExc));
    }

}