001/*
002 * (C) Copyright 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 *     Nuxeo - initial API and implementation
018 *
019 * $Id: DocumentModelResourceAdapter.java 28924 2008-01-10 14:04:05Z sfermigier $
020 */
021
022package org.nuxeo.ecm.platform.relations.adapters;
023
024import java.io.Serializable;
025import java.util.Map;
026
027import org.apache.commons.logging.Log;
028import org.apache.commons.logging.LogFactory;
029import org.nuxeo.ecm.core.api.CoreInstance;
030import org.nuxeo.ecm.core.api.CoreSession;
031import org.nuxeo.ecm.core.api.DocumentLocation;
032import org.nuxeo.ecm.core.api.DocumentModel;
033import org.nuxeo.ecm.core.api.DocumentNotFoundException;
034import org.nuxeo.ecm.core.api.DocumentRef;
035import org.nuxeo.ecm.core.api.IdRef;
036import org.nuxeo.ecm.core.api.repository.RepositoryManager;
037import org.nuxeo.ecm.platform.relations.api.QNameResource;
038import org.nuxeo.ecm.platform.relations.api.Resource;
039import org.nuxeo.ecm.platform.relations.api.impl.AbstractResourceAdapter;
040import org.nuxeo.ecm.platform.relations.api.impl.QNameResourceImpl;
041import org.nuxeo.runtime.api.Framework;
042
043/**
044 * Resource adapter using the document model id.
045 *
046 * @author <a href="mailto:at@nuxeo.com">Anahide Tchertchian</a>
047 */
048public class DocumentModelResourceAdapter extends AbstractResourceAdapter implements Serializable {
049
050    private static final Log log = LogFactory.getLog(DocumentModelResourceAdapter.class);
051
052    private static final long serialVersionUID = -5307418102496342779L;
053
054    @Override
055    public Serializable getResourceRepresentation(Resource resource, Map<String, Object> context) {
056        Serializable object = null;
057        if (resource.isQNameResource()) {
058            CoreSession session = null;
059            boolean sessionOpened = false;
060            try {
061                String repoName;
062                String uid;
063                String localName = ((QNameResource) resource).getLocalName();
064                int index = localName.indexOf('/');
065                if (index == -1) {
066                    // BBB for when repository name was not included in the
067                    // local name
068                    RepositoryManager mgr = Framework.getLocalService(RepositoryManager.class);
069                    repoName = mgr.getDefaultRepositoryName();
070                    uid = localName;
071                } else {
072                    repoName = localName.substring(0, index);
073                    uid = localName.substring(index + 1);
074                }
075                DocumentRef ref = new IdRef(uid);
076
077                if (context != null) {
078                    session = (CoreSession) context.get(CORE_SESSION_CONTEXT_KEY);
079                    if (!session.getRepositoryName().equals(repoName)) {
080                        // let's open one
081                        session = null;
082                    }
083                }
084                if (session == null) {
085                    // open one
086                    session = CoreInstance.openCoreSession(repoName);
087                    sessionOpened = true;
088                    if (log.isDebugEnabled()) {
089                        log.debug(String.format("Opened a new session '%s' with id %s", repoName,
090                                session.getSessionId()));
091                    }
092                }
093                if (!session.exists(ref)) {
094                    return null;
095                }
096                object = session.getDocument(ref);
097            } catch (DocumentNotFoundException e) {
098                log.warn("Cannot get resource: " + resource, e);
099            } finally {
100                if (sessionOpened) {
101                    session.close();
102                }
103            }
104        }
105        return object;
106    }
107
108    @Override
109    public Resource getResource(Serializable object, Map<String, Object> context) {
110        if (object instanceof DocumentModel) {
111            DocumentModel doc = (DocumentModel) object;
112            String localName = doc.getRepositoryName() + '/' + doc.getId();
113            return new QNameResourceImpl(namespace, localName);
114        } else if (object instanceof DocumentLocation) {
115            DocumentLocation docLoc = (DocumentLocation) object;
116            String localName = docLoc.getServerName() + '/' + docLoc.getIdRef().toString();
117            return new QNameResourceImpl(namespace, localName);
118        } else {
119            throw new IllegalArgumentException(String.format("cannot build resource for '%s'", object));
120        }
121    }
122
123    @Override
124    public Class<?> getKlass() {
125        return DocumentModel.class;
126    }
127
128}