001/* 002 * (C) Copyright 2013 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 * Antoine Taillefer <ataillefer@nuxeo.com> 018 */ 019package org.nuxeo.drive.adapter.impl; 020 021import java.io.IOException; 022 023import org.apache.commons.codec.digest.DigestUtils; 024import org.nuxeo.drive.adapter.FileSystemItem; 025import org.nuxeo.drive.service.VersioningFileSystemItemFactory; 026import org.nuxeo.ecm.core.api.Blob; 027import org.nuxeo.ecm.core.api.CoreSession; 028import org.nuxeo.ecm.core.api.DocumentModel; 029import org.nuxeo.ecm.core.api.NuxeoException; 030import org.nuxeo.ecm.core.versioning.VersioningService; 031 032/** 033 * Helper for {@link FileSystemItem} manipulation. 034 * 035 * @author Antoine Taillefer 036 */ 037public final class FileSystemItemHelper { 038 039 public static final String MD5_DIGEST_ALGORITHM = "MD5"; 040 041 private FileSystemItemHelper() { 042 // Helper class 043 } 044 045 /** 046 * @since 7.4 047 */ 048 public static void versionIfNeeded(VersioningFileSystemItemFactory factory, DocumentModel doc, CoreSession session) { 049 if (factory.needsVersioning(doc)) { 050 doc.putContextData(VersioningService.VERSIONING_OPTION, factory.getVersioningOption()); 051 session.saveDocument(doc); 052 } 053 } 054 055 /** 056 * Gets the md5 digest of the given blob. 057 */ 058 public static String getMD5Digest(Blob blob) { 059 try { 060 return DigestUtils.md5Hex(blob.getStream()); 061 } catch (IOException e) { 062 throw new NuxeoException(String.format("Error while computing digest for blob %s.", blob.getFilename()), e); 063 } 064 } 065 066}