001/*
002 * (C) Copyright 2006-2007 Nuxeo SAS <http://nuxeo.com> and others
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the Eclipse Public License v1.0
006 * which accompanies this distribution, and is available at
007 * http://www.eclipse.org/legal/epl-v10.html
008 *
009 * Contributors:
010 *     Jean-Marc Orliaguet, Chalmers
011 *
012 * $Id$
013 */
014
015package org.nuxeo.theme.jsf.negotiation.perspective;
016
017import java.util.Map;
018
019import javax.faces.context.FacesContext;
020
021import org.nuxeo.theme.negotiation.Scheme;
022import org.nuxeo.theme.perspectives.PerspectiveManager;
023
024public final class RequestAttribute implements Scheme {
025
026    public String getOutcome(final Object context) {
027        final Map<String, Object> parameters = ((FacesContext) context).getExternalContext().getRequestMap();
028        final String perspectiveName = (String) parameters.get("org.nuxeo.theme.perspective");
029        if (PerspectiveManager.hasPerspective(perspectiveName)) {
030            return perspectiveName;
031        }
032        return null;
033    }
034}