eu.planets_project.tb.gui.util.JSFUtil.java Source code

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Here is the source code for eu.planets_project.tb.gui.util.JSFUtil.java

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/*******************************************************************************
 * Copyright (c) 2007, 2010 The Planets Project Partners.
 *
 * All rights reserved. This program and the accompanying 
 * materials are made available under the terms of the 
 * Apache License, Version 2.0 which accompanies 
 * this distribution, and is available at 
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 *******************************************************************************/
package eu.planets_project.tb.gui.util;

import java.io.IOException;

import java.util.Map;

import javax.el.ELResolver;
import javax.faces.FacesException;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Utility class with useful methods for JSF/Web apps
 */

public class JSFUtil {
    private static Log log = LogFactory.getLog(JSFUtil.class);

    public static Object getManagedObject(String objectName) {
        FacesContext context = FacesContext.getCurrentInstance();
        if (context == null)
            return null;
        ELResolver resolver = context.getApplication().getELResolver();
        Object requestedObject = resolver.getValue(context.getELContext(), null, objectName);
        return requestedObject;
    }

    public static void storeOnSession(FacesContext ctx, String key, Object object) {
        Map<String, Object> sessionState = ctx.getExternalContext().getSessionMap();
        sessionState.put(key, object);
    }

    /**
     * Issues a redirect, e.g. JSFUtil.redirect( "/pages/page.faces" );
     * @param uri The URI in the application context to redirect to.
     */
    public static final void redirect(String uri) {
        FacesContext context = FacesContext.getCurrentInstance();
        ExternalContext externalContext = context.getExternalContext();
        String path = externalContext.getRequestContextPath();
        String url = externalContext.encodeResourceURL(path + uri);
        log.info("Issuing redirect to: " + url);
        try {
            externalContext.redirect(url);
        } catch (IOException ex) {
            throw new FacesException("Failed to redirect to uri: " + uri + "( " + url + " )", ex);
        }
    }

}