001/* 002 * (C) Copyright 2006-2009 Nuxeo SAS (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.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 * Nuxeo - initial API and implementation 016 * 017 * $Id$ 018 */ 019 020package org.nuxeo.ecm.platform.annotations.api; 021 022import java.io.Serializable; 023import java.net.URI; 024import java.net.URISyntaxException; 025import java.util.ArrayList; 026import java.util.List; 027import java.util.Map; 028 029import org.nuxeo.ecm.core.api.NuxeoException; 030import org.nuxeo.ecm.platform.relations.api.Graph; 031import org.nuxeo.ecm.platform.relations.api.Literal; 032import org.nuxeo.ecm.platform.relations.api.Node; 033import org.nuxeo.ecm.platform.relations.api.QueryResult; 034import org.nuxeo.ecm.platform.relations.api.Resource; 035import org.nuxeo.ecm.platform.relations.api.Statement; 036import org.nuxeo.ecm.platform.relations.api.impl.LiteralImpl; 037import org.nuxeo.ecm.platform.relations.api.impl.ResourceImpl; 038import org.nuxeo.ecm.platform.relations.api.impl.StatementImpl; 039 040public class AnnotationImpl implements Annotation, Serializable { 041 042 private static final long serialVersionUID = 1L; 043 044 public Graph getGraph() { 045 return graph; 046 } 047 048 public void setGraph(Graph graph) { 049 this.graph = graph; 050 } 051 052 private Graph graph; 053 054 @Override 055 public Resource getSubject() { 056 QueryResult result = graph.query("SELECT ?s WHERE {?s ?p ?o}", "sparql", 057 null); 058 List<Map<String, Node>> results = result.getResults(); 059 Node node = results.get(0).get("s"); 060 return node.isBlank() ? null : (Resource) node; 061 } 062 063 @Override 064 public void setBody(Statement body) { 065 graph.add(body); 066 } 067 068 @Override 069 public URI getAnnotates() { 070 QueryResult result = graph.query("SELECT ?o WHERE {?s <" + AnnotationsConstants.A_ANNOTATES + "> ?o}", 071 "sparql", null); 072 List<Map<String, Node>> results = result.getResults(); 073 if (results.isEmpty()) { 074 return null; 075 } 076 Node node = results.get(0).get("o"); 077 try { 078 return node.isBlank() ? null : new URI(((Resource) node).getUri()); 079 } catch (URISyntaxException e) { 080 throw new NuxeoException(e); 081 } 082 } 083 084 @Override 085 public URI getBody() { 086 QueryResult result = graph.query("SELECT ?o WHERE {?s <" + AnnotationsConstants.A_BODY + "> ?o}", "sparql", 087 null); 088 List<Map<String, Node>> results = result.getResults(); 089 if (results.isEmpty()) { 090 return null; 091 } 092 Node node = results.get(0).get("o"); 093 try { 094 return node.isBlank() ? null : new URI(((Resource) node).getUri()); 095 } catch (URISyntaxException e) { 096 throw new NuxeoException(e); 097 } 098 } 099 100 @Override 101 public String getBodyAsText() { 102 QueryResult result = graph.query("SELECT ?o WHERE {?s <" + AnnotationsConstants.A_BODY + "> ?o}", "sparql", 103 null); 104 List<Map<String, Node>> results = result.getResults(); 105 if (results.isEmpty()) { 106 return null; 107 } 108 Node node = results.get(0).get("o"); 109 if (node.isLiteral()) { 110 Literal literal = (Literal) node; 111 return literal.getValue(); 112 } 113 if (node.isResource()) { 114 Resource resource = (Resource) node; 115 return resource.getUri(); 116 } 117 return null; 118 } 119 120 @Override 121 public void setBodyText(String text) { 122 QueryResult result = graph.query("SELECT ?s WHERE {?s <" + AnnotationsConstants.A_BODY + "> ?o}", "sparql", 123 null); 124 Node s = result.getResults().get(0).get("s"); 125 Resource p = new ResourceImpl(AnnotationsConstants.A_BODY); 126 graph.remove(graph.getStatements(new StatementImpl(s, p, null))); 127 Literal o = new LiteralImpl(text); 128 Statement newStatement = new StatementImpl(s, p, o); 129 graph.add(newStatement); 130 } 131 132 @Override 133 public String getContext() { 134 QueryResult result = graph.query("SELECT ?o WHERE {?s <" + AnnotationsConstants.A_CONTEXT + "> ?o}", "sparql", 135 null); 136 List<Map<String, Node>> results = result.getResults(); 137 if (results.isEmpty()) { 138 return null; 139 } 140 Node node = results.get(0).get("o"); 141 return node.isBlank() ? null : ((Literal) node).getValue(); 142 } 143 144 @Override 145 public void setContext(Statement context) { 146 graph.add(context); 147 } 148 149 @Override 150 public List<Statement> getStatements() { 151 return graph.getStatements(); 152 } 153 154 @Override 155 public void setStatements(List<Statement> statements) { 156 graph.add(statements); 157 } 158 159 @Override 160 public void setSubject(Resource resource) { 161 List<Statement> statements = new ArrayList<Statement>(); 162 for (Statement statement : graph.getStatements()) { 163 statement.setSubject(resource); 164 statements.add(statement); 165 } 166 graph.clear(); 167 graph.add(statements); 168 } 169 170 @Override 171 public void setAnnotates(Statement statement) { 172 graph.add(statement); 173 } 174 175 @Override 176 public String getCreator() { 177 QueryResult result = graph.query("SELECT ?o WHERE {?s <" + AnnotationsConstants.D_CREATOR + "> ?o .}", 178 "sparql", null); 179 if (result.getCount() == 0) { 180 return null; 181 } 182 Node node = result.getResults().get(0).get("o"); 183 return node.isBlank() ? null : ((Literal) node).getValue(); 184 } 185 186 @Override 187 public void addMetadata(String predicate, String value) { 188 Statement statement = new StatementImpl(getSubject(), new ResourceImpl(predicate), new LiteralImpl(value)); 189 graph.add(statement); 190 } 191 192 @Override 193 public String getId() { 194 Resource subject = getSubject(); 195 String uri = subject.getUri().toString(); 196 return uri.substring(uri.lastIndexOf(":")); 197 } 198}