001/*
002 * (C) Copyright 2006-2011 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 * Nuxeo - initial API and implementation
018 */
019
020package org.nuxeo.ecm.core.api.localconfiguration;
021
022import org.apache.commons.logging.Log;
023import org.apache.commons.logging.LogFactory;
024import org.nuxeo.ecm.core.api.CoreSession;
025import org.nuxeo.ecm.core.api.DocumentModel;
026import org.nuxeo.ecm.core.api.DocumentRef;
027import org.nuxeo.runtime.model.DefaultComponent;
028
029/**
030 * Default implementation of {@code LocalConfigurationService}.
031 *
032 * @author <a href="mailto:[email protected]">Thomas Roger</a>
033 * @since 5.4.2
034 */
035public class LocalConfigurationServiceImpl extends DefaultComponent implements LocalConfigurationService {
036
037    private static final Log log = LogFactory.getLog(LocalConfigurationServiceImpl.class);
038
039    @Override
040    public <T extends LocalConfiguration> T getConfiguration(Class<T> configurationClass, String configurationFacet,
041            DocumentModel currentDoc) {
042        if (currentDoc == null || currentDoc.getRef() == null) {
043            return null;
044        }
045
046        CoreSession session = currentDoc.getCoreSession();
047        if (session == null) {
048            return null;
049        }
050
051        T localConfiguration = session.adaptFirstMatchingDocumentWithFacet(currentDoc.getRef(), configurationFacet,
052                configurationClass);
053        if (localConfiguration == null) {
054            // no local configuration found
055            return null;
056        }
057        while (localConfiguration.canMerge()) {
058            DocumentRef parentRef = session.getParentDocumentRef(localConfiguration.getDocumentRef());
059            if (parentRef == null) {
060                DocumentModel parentDoc = session.getParentDocument(localConfiguration.getDocumentRef());
061                if (parentDoc == null) {
062                    break;
063                }
064                parentRef = parentDoc.getRef();
065                if (parentRef == null) {
066                    break;
067                }
068            }
069            T parentConfiguration = session.adaptFirstMatchingDocumentWithFacet(parentRef, configurationFacet,
070                    configurationClass);
071            if (parentConfiguration == null) {
072                // stop merging
073                break;
074            }
075            localConfiguration.merge(parentConfiguration);
076        }
077        return localConfiguration;
078    }
079
080}