2 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3 * Copyright (C) $$Year-Rel$$ The Jalview Authors
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3
10 * of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 * The Jalview Authors are detailed in the 'AUTHORS' file.
21 package jalview.ext.ensembl;
23 import jalview.datamodel.AlignmentI;
24 import jalview.datamodel.DBRefEntry;
25 import jalview.util.DBRefUtils;
27 import java.io.BufferedReader;
28 import java.io.IOException;
29 import java.net.MalformedURLException;
31 import java.util.ArrayList;
32 import java.util.Iterator;
33 import java.util.List;
35 import org.json.simple.JSONArray;
36 import org.json.simple.JSONObject;
37 import org.json.simple.parser.JSONParser;
38 import org.json.simple.parser.ParseException;
41 * A class to fetch cross-references from Ensembl by calling the /xrefs REST
45 * @see http://rest.ensembl.org/documentation/info/xref_id
47 class EnsemblXref extends EnsemblRestClient
50 private static final String GO_GENE_ONTOLOGY = "GO";
52 private String dbName = "ENSEMBL (xref)";
60 public EnsemblXref(String dbSource, String version)
64 xrefVersion = dbSource + ":" + version;
69 public String getDbName()
75 public AlignmentI getSequenceRecords(String queries) throws Exception
81 protected URL getUrl(List<String> ids) throws MalformedURLException
83 return getUrl(ids.get(0));
87 protected boolean useGetRequest()
93 * Calls the Ensembl xrefs REST endpoint and retrieves any cross-references
94 * ("primary_id") for the given identifier (Ensembl accession id) and database
95 * names. The "dbname" returned by Ensembl is canonicalised to Jalview's
96 * standard version, and a DBRefEntry constructed. Currently takes all
97 * identifiers apart from GO terms and synonyms.
100 * an Ensembl stable identifier
103 public List<DBRefEntry> getCrossReferences(String identifier)
105 List<DBRefEntry> result = new ArrayList<>();
106 List<String> ids = new ArrayList<>();
109 BufferedReader br = null;
112 URL url = getUrl(identifier);
115 br = getHttpResponse(url, ids);
118 result = parseResponse(br);
121 } catch (IOException e)
131 } catch (IOException e)
142 * Parses "primary_id" and "dbname" values from the JSON response and
143 * constructs a DBRefEntry. Returns a list of the DBRefEntry created. Note we
144 * don't parse "synonyms" as they appear to be either redirected or obsolete
149 * @throws IOException
151 protected List<DBRefEntry> parseResponse(BufferedReader br)
154 JSONParser jp = new JSONParser();
155 List<DBRefEntry> result = new ArrayList<>();
158 JSONArray responses = (JSONArray) jp.parse(br);
159 Iterator rvals = responses.iterator();
160 while (rvals.hasNext())
162 JSONObject val = (JSONObject) rvals.next();
163 String db = val.get("dbname").toString();
164 String id = val.get("primary_id").toString();
165 if (db != null && id != null
166 && !GO_GENE_ONTOLOGY.equals(db))
168 db = DBRefUtils.getCanonicalName(db);
169 DBRefEntry dbref = new DBRefEntry(db, getXRefVersion(), id);
173 } catch (ParseException e)
180 private String xrefVersion = "ENSEMBL:0";
183 * version string for Xrefs - for 2.10, hardwired for ENSEMBL:0
187 public String getXRefVersion()
193 * Returns the URL for the REST endpoint to fetch all cross-references for an
194 * identifier. Note this may return protein cross-references for nucleotide.
195 * Filter the returned list as required.
200 protected URL getUrl(String identifier)
202 String url = getDomain() + "/xrefs/id/" + identifier
203 + CONTENT_TYPE_JSON + "&all_levels=1";
207 } catch (MalformedURLException e)