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  1. Project Clover database Thu Nov 7 2024 17:01:39 GMT
  2. Package jalview.ext.ensembl

File EnsemblLookup.java

 

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0% of files have more coverage

Code metrics

22
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Classes

Class Line # Actions
EnsemblLookup 47 60 28
0.00%
 

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1    /*
2    * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3    * Copyright (C) $$Year-Rel$$ The Jalview Authors
4    *
5    * This file is part of Jalview.
6    *
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.
11    *
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.
16    *
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.
20    */
21    package jalview.ext.ensembl;
22   
23    import jalview.bin.Console;
24    import jalview.datamodel.AlignmentI;
25    import jalview.datamodel.GeneLociI;
26    import jalview.datamodel.GeneLocus;
27    import jalview.datamodel.Mapping;
28    import jalview.util.MapList;
29   
30    import java.io.IOException;
31    import java.net.MalformedURLException;
32    import java.net.URL;
33    import java.util.Arrays;
34    import java.util.Collections;
35    import java.util.List;
36    import java.util.Map;
37   
38    import org.json.simple.parser.ParseException;
39   
40    /**
41    * A client for the Ensembl /lookup REST endpoint, used to find the gene
42    * identifier given a gene, transcript or protein identifier, or to extract the
43    * species or chromosomal coordinates from the same service response
44    *
45    * @author gmcarstairs
46    */
 
47    public class EnsemblLookup extends EnsemblRestClient
48    {
49    private static final String SPECIES = "species";
50   
51    /**
52    * Default constructor (to use rest.ensembl.org)
53    */
 
54  0 toggle public EnsemblLookup()
55    {
56  0 super();
57    }
58   
59    /**
60    * Constructor given the target domain to fetch data from
61    *
62    * @param
63    */
 
64  0 toggle public EnsemblLookup(String d)
65    {
66  0 super(d);
67    }
68   
 
69  0 toggle @Override
70    public String getDbName()
71    {
72  0 return "ENSEMBL";
73    }
74   
 
75  0 toggle @Override
76    public AlignmentI getSequenceRecords(String queries) throws Exception
77    {
78  0 return null;
79    }
80   
 
81  0 toggle @Override
82    protected URL getUrl(List<String> ids) throws MalformedURLException
83    {
84  0 String identifier = ids.get(0);
85  0 return getUrl(identifier, null);
86    }
87   
88    /**
89    * Gets the url for lookup of the given identifier, optionally with objectType
90    * also specified in the request
91    *
92    * @param identifier
93    * @param objectType
94    * @return
95    */
 
96  0 toggle protected URL getUrl(String identifier, String objectType)
97    {
98  0 String url = getDomain() + "/lookup/id/" + identifier
99    + CONTENT_TYPE_JSON;
100  0 if (objectType != null)
101    {
102  0 url += "&" + OBJECT_TYPE + "=" + objectType;
103    }
104   
105  0 try
106    {
107  0 return new URL(url);
108    } catch (MalformedURLException e)
109    {
110  0 return null;
111    }
112    }
113   
 
114  0 toggle @Override
115    protected boolean useGetRequest()
116    {
117  0 return true;
118    }
119   
120    /**
121    * Returns the gene id related to the given identifier (which may be for a
122    * gene, transcript or protein), or null if none is found
123    *
124    * @param identifier
125    * @return
126    */
 
127  0 toggle public String getGeneId(String identifier)
128    {
129  0 return getGeneId(identifier, null);
130    }
131   
132    /**
133    * Returns the gene id related to the given identifier (which may be for a
134    * gene, transcript or protein), or null if none is found
135    *
136    * @param identifier
137    * @param objectType
138    * @return
139    */
 
140  0 toggle public String getGeneId(String identifier, String objectType)
141    {
142  0 return parseGeneId(getResult(identifier, objectType));
143    }
144   
145    /**
146    * Parses the JSON response and returns the gene identifier, or null if not
147    * found. If the returned object_type is Gene, returns the id, if Transcript
148    * returns the Parent. If it is Translation (peptide identifier), then the
149    * Parent is the transcript identifier, so we redo the search with this value.
150    *
151    * @param br
152    * @return
153    */
 
154  0 toggle protected String parseGeneId(Map<String, Object> val)
155    {
156  0 if (val == null)
157    {
158  0 return null;
159    }
160  0 String geneId = null;
161  0 String type = val.get(OBJECT_TYPE).toString();
162  0 if (OBJECT_TYPE_GENE.equalsIgnoreCase(type))
163    {
164    // got the gene - just returns its id
165  0 geneId = val.get(JSON_ID).toString();
166    }
167  0 else if (OBJECT_TYPE_TRANSCRIPT.equalsIgnoreCase(type))
168    {
169    // got the transcript - return its (Gene) Parent
170  0 geneId = val.get(PARENT).toString();
171    }
172  0 else if (OBJECT_TYPE_TRANSLATION.equalsIgnoreCase(type))
173    {
174    // got the protein - get its Parent, restricted to type Transcript
175  0 String transcriptId = val.get(PARENT).toString();
176  0 geneId = getGeneId(transcriptId, OBJECT_TYPE_TRANSCRIPT);
177    }
178   
179  0 return geneId;
180    }
181   
182    /**
183    * Calls the Ensembl lookup REST endpoint and retrieves the 'species' for the
184    * given identifier, or null if not found
185    *
186    * @param identifier
187    * @return
188    */
 
189  0 toggle public String getSpecies(String identifier)
190    {
191  0 String species = null;
192  0 Map<String, Object> json = getResult(identifier, null);
193  0 if (json != null)
194    {
195  0 Object o = json.get(SPECIES);
196  0 if (o != null)
197    {
198  0 species = o.toString();
199    }
200    }
201  0 return species;
202    }
203   
204    /**
205    * Calls the /lookup/id rest service and returns the response as a Map<String,
206    * Object>, or null if any error
207    *
208    * @param identifier
209    * @param objectType
210    * (optional)
211    * @return
212    */
 
213  0 toggle @SuppressWarnings("unchecked")
214    protected Map<String, Object> getResult(String identifier,
215    String objectType)
216    {
217  0 List<String> ids = Arrays.asList(new String[] { identifier });
218   
219  0 try
220    {
221  0 return (Map<String, Object>) getJSON(getUrl(identifier, objectType),
222    ids, -1, MODE_MAP, null);
223    } catch (IOException | ParseException e)
224    {
225  0 jalview.bin.Console.errPrintln("Error parsing " + identifier
226    + " lookup response " + e.getMessage());
227  0 return null;
228    }
229    }
230   
231    /**
232    * Calls the /lookup/id rest service for the given id, and if successful,
233    * parses and returns the gene's chromosomal coordinates
234    *
235    * @param geneId
236    * @return
237    */
 
238  0 toggle public GeneLociI getGeneLoci(String geneId)
239    {
240  0 return parseGeneLoci(getResult(geneId, OBJECT_TYPE_GENE));
241    }
242   
243    /**
244    * Parses the /lookup/id response for species, asssembly_name,
245    * seq_region_name, start, end and returns an object that wraps them, or null
246    * if unsuccessful
247    *
248    * @param json
249    * @return
250    */
 
251  0 toggle GeneLociI parseGeneLoci(Map<String, Object> json)
252    {
253  0 if (json == null)
254    {
255  0 return null;
256    }
257   
258  0 try
259    {
260  0 final String species = json.get("species").toString();
261  0 final String assembly = json.get("assembly_name").toString();
262  0 final String chromosome = json.get("seq_region_name").toString();
263  0 String strand = json.get("strand").toString();
264  0 int start = Integer.parseInt(json.get("start").toString());
265  0 int end = Integer.parseInt(json.get("end").toString());
266  0 int fromEnd = end - start + 1;
267  0 boolean reverseStrand = "-1".equals(strand);
268  0 int toStart = reverseStrand ? end : start;
269  0 int toEnd = reverseStrand ? start : end;
270  0 List<int[]> fromRange = Collections
271    .singletonList(new int[]
272    { 1, fromEnd });
273  0 List<int[]> toRange = Collections
274    .singletonList(new int[]
275    { toStart, toEnd });
276  0 final Mapping map = new Mapping(
277    new MapList(fromRange, toRange, 1, 1));
278  0 return new GeneLocus(species == null ? "" : species, assembly,
279    chromosome, map);
280    } catch (NullPointerException | NumberFormatException e)
281    {
282  0 Console.error("Error looking up gene loci: " + e.getMessage());
283  0 e.printStackTrace();
284    }
285  0 return null;
286    }
287   
288    }