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.webengine.negotiation.perspective;
023
024import org.nuxeo.ecm.webengine.model.Resource;
025import org.nuxeo.ecm.webengine.model.WebContext;
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        WebContext webContext = (WebContext) context;
038        final TypeRegistry typeRegistry = Manager.getTypeRegistry();
039        final ApplicationType application = (ApplicationType) typeRegistry.lookup(TypeFamily.APPLICATION,
040                webContext.getModulePath(), webContext.getModule().getName());
041        if (application == null) {
042            return null;
043        }
044
045        Resource targetObject = webContext.getTargetObject();
046        if (targetObject == null) {
047            return null;
048        }
049        final String rootPath = webContext.getRoot().getPath();
050        final String viewId = targetObject.getPath().substring(rootPath.length());
051
052        final ViewDef view = application.getViewById(viewId);
053        if (view == null) {
054            return null;
055        }
056        final String perspectiveName = view.getPerspective();
057        if (PerspectiveManager.hasPerspective(perspectiveName)) {
058            return perspectiveName;
059        }
060        return null;
061    }
062}