001/*
002 * (C) Copyright 2006-2009 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 * $Id$
020 */
021
022package org.nuxeo.ecm.platform.picture.api.adapters;
023
024import java.util.ArrayList;
025import java.util.List;
026
027import org.nuxeo.ecm.core.api.Blob;
028import org.nuxeo.ecm.core.api.CloseableCoreSession;
029import org.nuxeo.ecm.core.api.CoreInstance;
030import org.nuxeo.ecm.core.api.CoreSession;
031import org.nuxeo.ecm.core.api.DocumentModel;
032import org.nuxeo.ecm.core.api.DocumentModelList;
033import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
034import org.nuxeo.ecm.core.api.blobholder.DocumentBlobHolder;
035
036public class PictureBookBlobHolder extends DocumentBlobHolder {
037
038    private CoreSession session;
039
040    public PictureBookBlobHolder(DocumentModel doc, String xPath) {
041        super(doc, xPath);
042    }
043
044    @Override
045    public Blob getBlob() {
046        CoreSession session = getSession();
047        boolean sessionOpened = false;
048        if (session == null) {
049            sessionOpened = true;
050            session = CoreInstance.openCoreSession(doc.getRepositoryName());
051        }
052        try {
053            DocumentModelList docs = session.getChildren(doc.getRef(), "Picture");
054            if (docs.isEmpty()) {
055                return null;
056            }
057            DocumentModel documentModel = docs.get(0);
058            if (documentModel == null) {
059                return null;
060            }
061            BlobHolder bh = documentModel.getAdapter(BlobHolder.class);
062            return bh.getBlob();
063        } finally {
064            if (sessionOpened) {
065                ((CloseableCoreSession) session).close();
066            }
067        }
068
069    }
070
071    @Override
072    public List<Blob> getBlobs() {
073        return getBlobs("Original");
074    }
075
076    public List<Blob> getBlobs(String title) {
077        CoreSession session = getSession();
078        boolean sessionOpened = false;
079        if (session == null) {
080            sessionOpened = true;
081            session = CoreInstance.openCoreSession(doc.getRepositoryName());
082        }
083        try {
084            DocumentModelList docList = session.getChildren(doc.getRef(), "Picture");
085            List<Blob> blobList = new ArrayList<Blob>(docList.size());
086            for (DocumentModel documentModel : docList) {
087                if ("Original".equals(title)) {
088                    BlobHolder bh = documentModel.getAdapter(BlobHolder.class);
089                    blobList.add(bh.getBlob());
090                } else {
091                    PictureResourceAdapter picture = documentModel.getAdapter(PictureResourceAdapter.class);
092                    blobList.add(picture.getPictureFromTitle(title));
093                }
094            }
095            return blobList;
096        } finally {
097            if (sessionOpened) {
098                ((CloseableCoreSession) session).close();
099            }
100        }
101    }
102
103    @Override
104    public String getHash() {
105        Blob blob = getBlob();
106        if (blob != null) {
107            String h = blob.getDigest();
108            if (h != null) {
109                return h;
110            }
111        }
112        return doc.getId() + xPath + getModificationDate().toString();
113    }
114
115    protected CoreSession getSession() {
116        if (session == null && doc != null) {
117            session = doc.getCoreSession();
118        }
119        return session;
120    }
121
122}