001/* 002 * (C) Copyright 2015 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 * Florent Guillaume 016 */ 017package org.nuxeo.ecm.core.blob.binary; 018 019import java.io.IOException; 020import java.util.Map; 021 022import org.nuxeo.ecm.core.api.Blob; 023import org.nuxeo.ecm.core.blob.BlobManager; 024import org.nuxeo.ecm.core.blob.BlobManager.BlobInfo; 025import org.nuxeo.ecm.core.blob.BlobProvider; 026import org.nuxeo.ecm.core.model.Document; 027 028/** 029 * Adapter between the {@link BinaryManager} and a {@link BlobProvider} for the {@link BlobManager}. 030 * <p> 031 * Can be used by legacy implementations of a {@link BinaryManager} to provide a {@link BlobProvider} implementation. 032 * 033 * @since 7.3 034 */ 035public class BinaryBlobProvider implements BlobProvider { 036 037 protected final BinaryManager binaryManager; 038 039 public BinaryBlobProvider(BinaryManager binaryManager) { 040 this.binaryManager = binaryManager; 041 } 042 043 @Override 044 public void initialize(String blobProviderId, Map<String, String> properties) throws IOException { 045 binaryManager.initialize(blobProviderId, properties); 046 } 047 048 /** 049 * Closes the adapted {@link BinaryManager}. 050 */ 051 @Override 052 public void close() { 053 binaryManager.close(); 054 } 055 056 @Override 057 public BinaryManager getBinaryManager() { 058 return binaryManager; 059 } 060 061 @Override 062 public Blob readBlob(BlobInfo blobInfo) throws IOException { 063 String digest = blobInfo.key; 064 // strip prefix 065 int colon = digest.indexOf(':'); 066 if (colon >= 0) { 067 digest = digest.substring(colon + 1); 068 } 069 Binary binary = binaryManager.getBinary(digest); 070 if (binary == null) { 071 throw new IOException("Unknown binary: " + digest); 072 } 073 return new BinaryBlob(binary, blobInfo.key, blobInfo.filename, blobInfo.mimeType, blobInfo.encoding, 074 blobInfo.digest, binary.getLength()); // use binary length, authoritative 075 } 076 077 @Override 078 public boolean supportsWrite() { 079 return true; 080 } 081 082 @Override 083 public String writeBlob(Blob blob, Document doc) throws IOException { 084 // writes the blob and return its digest 085 return binaryManager.getBinary(blob).getDigest(); 086 } 087 088}