001/* 002 * (C) Copyright 2006-2011 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 * Thierry Delprat 018 * Florent Guillaume 019 */ 020 021package org.nuxeo.ecm.core.api.blobholder; 022 023import java.io.IOException; 024import java.io.InputStream; 025import java.util.ArrayList; 026import java.util.Calendar; 027import java.util.List; 028 029import org.apache.commons.codec.digest.DigestUtils; 030import org.nuxeo.ecm.core.api.Blob; 031import org.nuxeo.ecm.core.api.NuxeoException; 032 033/** 034 * Base class for {@link BlobHolder} implementers 035 */ 036public abstract class AbstractBlobHolder implements BlobHolder { 037 038 @Override 039 public abstract Blob getBlob(); 040 041 @Override 042 public void setBlob(Blob blob) { 043 throw new UnsupportedOperationException(); 044 } 045 046 @Override 047 public List<Blob> getBlobs() { 048 List<Blob> blobs = null; 049 050 Blob blob = getBlob(); 051 if (blob != null) { 052 blobs = new ArrayList<>(); 053 blobs.add(blob); 054 } 055 056 return blobs; 057 } 058 059 protected abstract String getBasePath(); 060 061 @Override 062 public String getFilePath() { 063 String path = getBasePath(); 064 065 Blob blob = getBlob(); 066 if (blob != null) { 067 path = path + "/" + blob.getFilename(); 068 } 069 070 return path; 071 } 072 073 @Override 074 public String getHash() { 075 076 Blob blob = getBlob(); 077 if (blob != null) { 078 String h = blob.getDigest(); 079 if (h == null) { 080 h = getMD5Digest(); 081 blob.setDigest(h); 082 } 083 return h; 084 } 085 return "NullBlob"; 086 } 087 088 protected String getMD5Digest() { 089 try (InputStream in = getBlob().getStream()) { 090 return DigestUtils.md5Hex(in); 091 } catch (IOException e) { 092 throw new NuxeoException(e); 093 } 094 } 095 096 @Override 097 public abstract Calendar getModificationDate(); 098 099}