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.CloseableCoreSession;
030import org.nuxeo.ecm.core.api.CoreInstance;
031import org.nuxeo.ecm.core.api.CoreSession;
032import org.nuxeo.ecm.core.api.DocumentLocation;
033import org.nuxeo.ecm.core.api.DocumentModel;
034import org.nuxeo.ecm.core.api.DocumentNotFoundException;
035import org.nuxeo.ecm.core.api.DocumentRef;
036import org.nuxeo.ecm.core.api.IdRef;
037import org.nuxeo.ecm.core.api.repository.RepositoryManager;
038import org.nuxeo.ecm.platform.relations.api.QNameResource;
039import org.nuxeo.ecm.platform.relations.api.Resource;
040import org.nuxeo.ecm.platform.relations.api.impl.AbstractResourceAdapter;
041import org.nuxeo.ecm.platform.relations.api.impl.QNameResourceImpl;
042import org.nuxeo.runtime.api.Framework;
043
044/**
045 * Resource adapter using the document model id.
046 *
047 * @author <a href="mailto:[email protected]">Anahide Tchertchian</a>
048 */
049public class DocumentModelResourceAdapter extends AbstractResourceAdapter implements Serializable {
050
051    private static final Log log = LogFactory.getLog(DocumentModelResourceAdapter.class);
052
053    private static final long serialVersionUID = -5307418102496342779L;
054
055    @Override
056    public Serializable getResourceRepresentation(Resource resource, Map<String, Object> context) {
057        Serializable object = null;
058        if (resource.isQNameResource()) {
059            CoreSession session = null;
060            boolean sessionOpened = false;
061            try {
062                String repoName;
063                String uid;
064                String localName = ((QNameResource) resource).getLocalName();
065                int index = localName.indexOf('/');
066                if (index == -1) {
067                    // BBB for when repository name was not included in the
068                    // local name
069                    RepositoryManager mgr = Framework.getService(RepositoryManager.class);
070                    repoName = mgr.getDefaultRepositoryName();
071                    uid = localName;
072                } else {
073                    repoName = localName.substring(0, index);
074                    uid = localName.substring(index + 1);
075                }
076                DocumentRef ref = new IdRef(uid);
077
078                if (context != null) {
079                    session = (CoreSession) context.get(CORE_SESSION_CONTEXT_KEY);
080                    if (!session.getRepositoryName().equals(repoName)) {
081                        // let's open one
082                        session = null;
083                    }
084                }
085                if (session == null) {
086                    // open one
087                    session = CoreInstance.openCoreSession(repoName);
088                    sessionOpened = true;
089                    if (log.isDebugEnabled()) {
090                        log.debug(String.format("Opened a new session '%s' with id %s", repoName,
091                                session.getSessionId()));
092                    }
093                }
094                if (!session.exists(ref)) {
095                    return null;
096                }
097                object = session.getDocument(ref);
098            } catch (DocumentNotFoundException e) {
099                log.warn("Cannot get resource: " + resource, e);
100            } finally {
101                if (sessionOpened) {
102                    ((CloseableCoreSession) session).close();
103                }
104            }
105        }
106        return object;
107    }
108
109    @Override
110    public Resource getResource(Serializable object, Map<String, Object> context) {
111        if (object instanceof DocumentModel) {
112            DocumentModel doc = (DocumentModel) object;
113            String localName = doc.getRepositoryName() + '/' + doc.getId();
114            return new QNameResourceImpl(namespace, localName);
115        } else if (object instanceof DocumentLocation) {
116            DocumentLocation docLoc = (DocumentLocation) object;
117            String localName = docLoc.getServerName() + '/' + docLoc.getIdRef().toString();
118            return new QNameResourceImpl(namespace, localName);
119        } else {
120            throw new IllegalArgumentException(String.format("cannot build resource for '%s'", object));
121        }
122    }
123
124    @Override
125    public Class<?> getKlass() {
126        return DocumentModel.class;
127    }
128
129}