001/* 002 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl-2.1.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Antoine Taillefer <ataillefer@nuxeo.com> 016 */ 017package org.nuxeo.drive.adapter.impl; 018 019import java.io.IOException; 020 021import org.apache.commons.codec.digest.DigestUtils; 022import org.nuxeo.drive.adapter.FileSystemItem; 023import org.nuxeo.drive.service.VersioningFileSystemItemFactory; 024import org.nuxeo.ecm.core.api.Blob; 025import org.nuxeo.ecm.core.api.CoreSession; 026import org.nuxeo.ecm.core.api.DocumentModel; 027import org.nuxeo.ecm.core.api.NuxeoException; 028import org.nuxeo.ecm.core.versioning.VersioningService; 029 030/** 031 * Helper for {@link FileSystemItem} manipulation. 032 * 033 * @author Antoine Taillefer 034 */ 035public final class FileSystemItemHelper { 036 037 public static final String MD5_DIGEST_ALGORITHM = "MD5"; 038 039 private FileSystemItemHelper() { 040 // Helper class 041 } 042 043 /** 044 * @since 7.4 045 */ 046 public static void versionIfNeeded(VersioningFileSystemItemFactory factory, DocumentModel doc, CoreSession session) { 047 if (factory.needsVersioning(doc)) { 048 doc.putContextData(VersioningService.VERSIONING_OPTION, factory.getVersioningOption()); 049 session.saveDocument(doc); 050 } 051 } 052 053 /** 054 * Gets the md5 digest of the given blob. 055 */ 056 public static String getMD5Digest(Blob blob) { 057 try { 058 return DigestUtils.md5Hex(blob.getStream()); 059 } catch (IOException e) { 060 throw new NuxeoException(String.format("Error while computing digest for blob %s.", blob.getFilename()), e); 061 } 062 } 063 064}