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.io.gff;
23 import jalview.datamodel.AlignedCodonFrame;
24 import jalview.datamodel.AlignmentI;
25 import jalview.datamodel.MappingType;
26 import jalview.datamodel.SequenceFeature;
27 import jalview.datamodel.SequenceI;
28 import jalview.util.MapList;
29 import jalview.util.StringUtils;
31 import java.io.IOException;
32 import java.util.List;
36 * Base class with generic / common functionality for processing GFF3 data.
37 * Override this as required for any specialisations resulting from
38 * peculiarities of GFF3 generated by particular tools.
40 public class Gff3Helper extends GffHelperBase
42 public static final String ALLELES = "alleles";
44 protected static final String TARGET = "Target";
46 protected static final String ID = "ID";
48 private static final String NAME = "Name";
51 * GFF3 uses '=' to delimit name/value pairs in column 9, and comma to
52 * separate multiple values for a name
57 public static Map<String, List<String>> parseNameValuePairs(String text)
59 return parseNameValuePairs(text, ";", '=', ",");
63 * Process one GFF feature line (as modelled by SequenceFeature)
66 * the sequence with which this feature is associated
68 * the sequence feature with ATTRIBUTES property containing any
69 * additional attributes
71 * the alignment we are adding GFF to
73 * any new sequences referenced by the GFF
74 * @param relaxedIdMatching
75 * if true, match word tokens in sequence names
76 * @return true if the sequence feature should be added to the sequence, else
77 * false (i.e. it has been processed in another way e.g. to generate a
82 public SequenceFeature processGff(SequenceI seq, String[] gff,
83 AlignmentI align, List<SequenceI> newseqs,
84 boolean relaxedIdMatching) throws IOException
86 SequenceFeature sf = null;
90 String soTerm = gff[TYPE_COL];
91 String atts = gff[ATTRIBUTES_COL];
92 Map<String, List<String>> attributes = parseNameValuePairs(atts);
94 SequenceOntologyI so = SequenceOntologyFactory.getSequenceOntology();
95 if (so.isA(soTerm, SequenceOntologyI.PROTEIN_MATCH))
97 sf = processProteinMatch(attributes, seq, gff, align, newseqs,
100 else if (so.isA(soTerm, SequenceOntologyI.NUCLEOTIDE_MATCH))
102 sf = processNucleotideMatch(attributes, seq, gff, align, newseqs,
107 sf = buildSequenceFeature(gff, attributes);
113 * fall back on generating a sequence feature with no special processing
115 sf = buildSequenceFeature(gff, null);
122 * Processes one GFF3 nucleotide (e.g. cDNA to genome) match.
125 * parsed GFF column 9 key/value(s)
127 * the sequence the GFF feature is on
129 * the GFF column data
131 * the alignment the sequence belongs to, where any new mappings
134 * a list of new 'virtual sequences' generated while parsing GFF
135 * @param relaxedIdMatching
136 * if true allow fuzzy search for a matching target sequence
137 * @return a sequence feature, if one should be added to the sequence, else
139 * @throws IOException
141 protected SequenceFeature processNucleotideMatch(
142 Map<String, List<String>> attributes, SequenceI seq,
143 String[] gffColumns, AlignmentI align, List<SequenceI> newseqs,
144 boolean relaxedIdMatching) throws IOException
146 String strand = gffColumns[STRAND_COL];
149 * (For now) we don't process mappings from reverse complement ; to do
150 * this would require (a) creating a virtual sequence placeholder for
151 * the reverse complement (b) resolving the sequence by its id from some
152 * source (GFF ##FASTA or other) (c) creating the reverse complement
153 * sequence (d) updating the mapping to be to the reverse complement
155 if ("-".equals(strand))
158 "Skipping mapping from reverse complement as not yet supported");
162 List<String> targets = attributes.get(TARGET);
165 System.err.println("'Target' missing in GFF");
170 * Typically we only expect one Target per GFF line, but this can handle
171 * multiple matches, to the same or different sequences (e.g. dna variants)
173 for (String target : targets)
176 * Process "seqid start end [strand]"
178 String[] tokens = target.split(" ");
179 if (tokens.length < 3)
181 System.err.println("Incomplete Target: " + target);
186 * Locate the mapped sequence in the alignment, or as a
187 * (new or existing) virtual sequence in the newseqs list
189 String targetId = findTargetId(tokens[0], attributes);
190 SequenceI mappedSequence1 = findSequence(targetId, align, newseqs,
192 SequenceI mappedSequence = mappedSequence1;
193 if (mappedSequence == null)
199 * get any existing mapping for these sequences (or start one),
200 * and add this mapped range
202 AlignedCodonFrame acf = getMapping(align, seq, mappedSequence);
206 int toStart = Integer.parseInt(tokens[1]);
207 int toEnd = Integer.parseInt(tokens[2]);
208 if (tokens.length > 3 && "-".equals(tokens[3]))
210 // mapping to reverse strand - swap start/end
216 int fromStart = Integer.parseInt(gffColumns[START_COL]);
217 int fromEnd = Integer.parseInt(gffColumns[END_COL]);
218 MapList mapping = constructMappingFromAlign(fromStart, fromEnd,
219 toStart, toEnd, MappingType.NucleotideToNucleotide);
223 acf.addMap(seq, mappedSequence, mapping);
224 align.addCodonFrame(acf);
226 } catch (NumberFormatException nfe)
228 System.err.println("Invalid start or end in Target " + target);
232 SequenceFeature sf = buildSequenceFeature(gffColumns, attributes);
237 * Returns the target sequence id extracted from the GFF name/value pairs.
238 * Default (standard behaviour) is the first token for "Target". This may be
239 * overridden where tools report this in a non-standard way.
242 * first token of a "Target" value from GFF column 9, typically
245 * a map with all parsed column 9 attributes
248 @SuppressWarnings("unused")
249 protected String findTargetId(String target,
250 Map<String, List<String>> set)
256 * Processes one GFF 'protein_match'; fields of interest are
258 * <li>feature group - the database reporting a match e.g. Pfam</li>
259 * <li>Name - the matched entry's accession id in the database</li>
260 * <li>ID - a sequence identifier for the matched region (which may be
261 * appended as FASTA in the GFF file)</li>
265 * parsed GFF column 9 key/value(s)
267 * the sequence the GFF feature is on
269 * the sequence feature holding GFF data
271 * the alignment the sequence belongs to, where any new mappings
274 * a list of new 'virtual sequences' generated while parsing GFF
275 * @param relaxedIdMatching
276 * if true allow fuzzy search for a matching target sequence
277 * @return the (real or virtual) sequence(s) mapped to by this match
278 * @throws IOException
280 protected SequenceFeature processProteinMatch(
281 Map<String, List<String>> set, SequenceI seq, String[] gffColumns,
282 AlignmentI align, List<SequenceI> newseqs,
283 boolean relaxedIdMatching)
285 // This is currently tailored to InterProScan GFF output:
286 // ID holds the ID of the matched sequence, Target references the
287 // query sequence; this looks wrong, as ID should just be the GFF internal
288 // ID of the GFF feature, while Target would normally reference the matched
290 // TODO refactor as needed if other protein-protein GFF varies
292 SequenceFeature sf = buildSequenceFeature(gffColumns, set);
295 * locate the mapped sequence in the alignment, or as a
296 * (new or existing) virtual sequence in the newseqs list
298 List<String> targets = set.get(TARGET);
301 for (String target : targets)
304 SequenceI mappedSequence1 = findSequence(findTargetId(target, set),
305 align, newseqs, relaxedIdMatching);
306 SequenceI mappedSequence = mappedSequence1;
307 if (mappedSequence == null)
313 * give the mapped sequence a copy of the sequence feature, with
314 * start/end range adjusted
316 int sequenceFeatureLength = 1 + sf.getEnd() - sf.getBegin();
317 SequenceFeature sf2 = new SequenceFeature(sf, 1,
318 sequenceFeatureLength, sf.getFeatureGroup(), sf.getScore());
319 mappedSequence.addSequenceFeature(sf2);
322 * add a property to the mapped sequence so that it can eventually be
323 * renamed with its qualified accession id; renaming has to wait until
324 * all sequence reference resolution is complete
326 String accessionId = StringUtils
327 .listToDelimitedString(set.get(NAME), ",");
328 if (accessionId.length() > 0)
330 String database = sf.getType(); // TODO InterProScan only??
331 String qualifiedAccId = database + "|" + accessionId;
332 sf2.setValue(RENAME_TOKEN, qualifiedAccId);
336 * get any existing mapping for these sequences (or start one),
337 * and add this mapped range
339 AlignedCodonFrame alco = getMapping(align, seq, mappedSequence);
340 int[] from = new int[] { sf.getBegin(), sf.getEnd() };
341 int[] to = new int[] { 1, sequenceFeatureLength };
342 MapList mapping = new MapList(from, to, 1, 1);
344 alco.addMap(seq, mappedSequence, mapping);
345 align.addCodonFrame(alco);
353 * Return '=' as the name-value separator used in column 9 attributes.
356 protected char getNameValueSeparator()
362 * Modifies the default SequenceFeature in order to set the Target sequence id
366 protected SequenceFeature buildSequenceFeature(String[] gff,
367 int typeColumn, String group,
368 Map<String, List<String>> attributes)
370 SequenceFeature sf = super.buildSequenceFeature(gff, typeColumn, group,
372 String desc = getDescription(sf, attributes);
375 sf.setDescription(desc);
381 * Apply heuristic rules to try to get the most useful feature description
387 protected String getDescription(SequenceFeature sf,
388 Map<String, List<String>> attributes)
391 String target = (String) sf.getValue(TARGET);
394 desc = target.split(" ")[0];
397 SequenceOntologyI so = SequenceOntologyFactory.getSequenceOntology();
398 String type = sf.getType();
399 if (so.isA(type, SequenceOntologyI.SEQUENCE_VARIANT))
402 * Ensembl returns dna variants as 'alleles'
404 desc = StringUtils.listToDelimitedString(attributes.get(ALLELES),
409 * extract 'Name' for a transcript (to show gene name)
410 * or an exon (so 'colour by label' shows exon boundaries)
412 if (SequenceOntologyI.NMD_TRANSCRIPT_VARIANT.equals(type)
413 || so.isA(type, SequenceOntologyI.TRANSCRIPT)
414 || so.isA(type, SequenceOntologyI.EXON))
416 desc = StringUtils.listToDelimitedString(attributes.get("Name"), ",");
420 * if the above fails, try ID
424 desc = (String) sf.getValue(ID);