001/*
002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Jean-Marc Orliaguet, Chalmers
018 *
019 * $Id$
020 */
021
022package org.nuxeo.theme.jsf.negotiation.perspective;
023
024import javax.faces.context.FacesContext;
025
026import org.nuxeo.theme.ApplicationType;
027import org.nuxeo.theme.Manager;
028import org.nuxeo.theme.ViewDef;
029import org.nuxeo.theme.negotiation.Scheme;
030import org.nuxeo.theme.perspectives.PerspectiveManager;
031import org.nuxeo.theme.types.TypeFamily;
032import org.nuxeo.theme.types.TypeRegistry;
033
034public final class ViewId implements Scheme {
035
036    public String getOutcome(final Object context) {
037        final String viewId = ((FacesContext) context).getViewRoot().getViewId();
038        final TypeRegistry typeRegistry = Manager.getTypeRegistry();
039
040        final String applicationPath = ((FacesContext) context).getExternalContext().getRequestContextPath();
041
042        final ApplicationType application = (ApplicationType) typeRegistry.lookup(TypeFamily.APPLICATION,
043                applicationPath);
044        if (application == null) {
045            return null;
046        }
047
048        final ViewDef view = application.getViewById(viewId);
049        if (view == null) {
050            return null;
051        }
052
053        final String perspectiveName = view.getPerspective();
054        if (PerspectiveManager.hasPerspective(perspectiveName)) {
055            return perspectiveName;
056        }
057        return null;
058    }
059}