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;
25 import java.io.BufferedReader;
26 import java.io.IOException;
27 import java.net.MalformedURLException;
29 import java.util.Arrays;
30 import java.util.List;
32 import org.json.simple.JSONObject;
33 import org.json.simple.parser.JSONParser;
34 import org.json.simple.parser.ParseException;
37 * A client for the Ensembl lookup REST endpoint; used to find the Parent gene
38 * identifier given a transcript identifier.
43 public class EnsemblLookup extends EnsemblRestClient
46 private static final String OBJECT_TYPE_TRANSLATION = "Translation";
47 private static final String PARENT = "Parent";
48 private static final String OBJECT_TYPE_TRANSCRIPT = "Transcript";
49 private static final String ID = "id";
50 private static final String OBJECT_TYPE_GENE = "Gene";
51 private static final String OBJECT_TYPE = "object_type";
53 private String lastId;
56 * Default constructor (to use rest.ensembl.org)
58 public EnsemblLookup()
64 * Constructor given the target domain to fetch data from
68 public EnsemblLookup(String d)
74 public String getDbName()
80 public AlignmentI getSequenceRecords(String queries) throws Exception
86 protected URL getUrl(List<String> ids) throws MalformedURLException
88 String identifier = ids.get(0);
89 return getUrl(identifier);
96 protected URL getUrl(String identifier)
98 String url = getDomain() + "/lookup/id/" + identifier
103 } catch (MalformedURLException e)
110 protected boolean useGetRequest()
116 protected String getRequestMimeType(boolean multipleIds)
118 return "application/json";
122 protected String getResponseMimeType()
124 return "application/json";
128 * Calls the Ensembl lookup REST endpoint and retrieves the 'Parent' for the
129 * given identifier, or null if not found
134 public String getGeneId(String identifier)
136 List<String> ids = Arrays.asList(new String[] { identifier });
138 BufferedReader br = null;
141 URL url = getUrl(identifier);
142 if (identifier.equals(lastId))
144 System.err.println("** Ensembl lookup " + url.toString()
145 + " looping on Parent!");
151 br = getHttpResponse(url, ids);
153 return br == null ? null : parseResponse(br);
154 } catch (IOException e)
165 } catch (IOException e)
174 * Parses the JSON response and returns the gene identifier, or null if not
175 * found. If the returned object_type is Gene, returns the id, if Transcript
176 * returns the Parent. If it is Translation (peptide identifier), then the
177 * Parent is the transcript identifier, so we redo the search with this value.
181 * @throws IOException
183 protected String parseResponse(BufferedReader br) throws IOException
185 String geneId = null;
186 JSONParser jp = new JSONParser();
189 JSONObject val = (JSONObject) jp.parse(br);
190 String type = val.get(OBJECT_TYPE).toString();
191 if (OBJECT_TYPE_GENE.equalsIgnoreCase(type))
193 geneId = val.get(ID).toString();
195 else if (OBJECT_TYPE_TRANSCRIPT.equalsIgnoreCase(type))
197 geneId = val.get(PARENT).toString();
199 else if (OBJECT_TYPE_TRANSLATION.equalsIgnoreCase(type))
201 String transcriptId = val.get(PARENT).toString();
204 geneId = getGeneId(transcriptId);
205 } catch (StackOverflowError e)
208 * unlikely data condition error!
211 .println("** Ensembl lookup "
212 + getUrl(transcriptId).toString()
213 + " looping on Parent!");
216 } catch (ParseException e)