001/* 002 * (C) Copyright 2006-2016 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 */ 019package org.nuxeo.ecm.platform.pictures.tiles.api.imageresource; 020 021import java.util.Calendar; 022 023import org.nuxeo.ecm.core.api.Blob; 024import org.nuxeo.ecm.core.api.DocumentModel; 025import org.nuxeo.ecm.core.api.PropertyException; 026 027/** 028 * DocumentModel-based implementation of ImageResource. Supports clean digest and modification date to have a clean 029 * invalidation system. 030 * 031 * @author tiry 032 */ 033public class DocumentImageResource implements ImageResource { 034 035 private static final long serialVersionUID = 1L; 036 037 protected Blob blob; 038 039 protected String hash; 040 041 protected Calendar modified; 042 043 protected DocumentModel doc; 044 045 protected String xPath; 046 047 /** 048 * @deprecated since 9.1 as filename is now hold by the blob and no longer exist beside it 049 */ 050 @Deprecated 051 protected String fileName; 052 053 public DocumentImageResource(DocumentModel doc, String xPath) { 054 this.doc = doc; 055 this.xPath = xPath; 056 } 057 058 protected String getEscapedxPath(String xPath) { 059 String clean = xPath.replace(":", "_"); 060 clean = clean.replace("/", "_"); 061 clean = clean.replace("[", ""); 062 clean = clean.replace("]", ""); 063 return clean; 064 } 065 066 protected void compute() throws PropertyException { 067 068 blob = (Blob) doc.getProperty(xPath).getValue(); 069 modified = (Calendar) doc.getProperty("dublincore", "modified"); 070 071 hash = blob.getDigest(); 072 if (hash == null) { 073 hash = doc.getRepositoryName() + "_" + doc.getId() + "_" + getEscapedxPath(xPath); 074 if (modified != null) { 075 hash = hash + "_" + modified.getTimeInMillis(); 076 } 077 } 078 } 079 080 public Blob getBlob() { 081 if (blob == null) { 082 compute(); 083 } 084 if (fileName != null) { 085 blob.setFilename(fileName); 086 } 087 return blob; 088 } 089 090 public String getHash() { 091 if (hash == null) { 092 compute(); 093 } 094 return hash; 095 } 096 097 public Calendar getModificationDate() { 098 if (modified == null) { 099 compute(); 100 } 101 return modified; 102 } 103 104 /** 105 * @deprecated since 9.1 as filename is now hold by the blob and no longer exist beside it 106 */ 107 @Deprecated 108 public void setFileName(String name) { 109 this.fileName = name; 110 } 111 112}