private VariantCallContext estimateReferenceConfidence(
VariantContext vc,
Map<String, AlignmentContext> contexts,
double theta,
boolean ignoreCoveredSamples,
double initialPofRef) {
if (contexts == null) return null;
double P_of_ref = initialPofRef;
// for each sample that we haven't examined yet
for (String sample : samples) {
boolean isCovered = contexts.containsKey(sample);
if (ignoreCoveredSamples && isCovered) continue;
int depth = 0;
if (isCovered) {
depth = contexts.get(sample).getBasePileup().depthOfCoverage();
}
P_of_ref *= 1.0 - (theta / 2.0) * getRefBinomialProb(depth);
}
return new VariantCallContext(
vc,
QualityUtils.phredScaleErrorRate(1.0 - P_of_ref) >= UAC.STANDARD_CONFIDENCE_FOR_CALLING,
false);
}
private static Map<String, GenotypeLikelihoodsCalculationModel>
getGenotypeLikelihoodsCalculationObject(Logger logger, UnifiedArgumentCollection UAC) {
final Map<String, GenotypeLikelihoodsCalculationModel> glcm =
new HashMap<String, GenotypeLikelihoodsCalculationModel>();
final List<Class<? extends GenotypeLikelihoodsCalculationModel>> glmClasses =
new PluginManager<GenotypeLikelihoodsCalculationModel>(
GenotypeLikelihoodsCalculationModel.class)
.getPlugins();
for (int i = 0; i < glmClasses.size(); i++) {
final Class<? extends GenotypeLikelihoodsCalculationModel> glmClass = glmClasses.get(i);
final String key =
glmClass
.getSimpleName()
.replaceAll("GenotypeLikelihoodsCalculationModel", "")
.toUpperCase();
try {
final Object args[] = new Object[] {UAC, logger};
final Constructor c =
glmClass.getDeclaredConstructor(UnifiedArgumentCollection.class, Logger.class);
glcm.put(key, (GenotypeLikelihoodsCalculationModel) c.newInstance(args));
} catch (Exception e) {
throw new UserException(
"The likelihoods model provided for the -glm argument ("
+ UAC.GLmodel
+ ") is not a valid option: "
+ e.getMessage());
}
}
return glcm;
}
/**
* Read in a list of ExactCall objects from reader, keeping only those with starts in startsToKeep
* or all sites (if this is empty)
*
* @param reader a just-opened reader sitting at the start of the file
* @param startsToKeep a list of start position of the calls to keep, or empty if all calls should
* be kept
* @param parser a genome loc parser to create genome locs
* @return a list of ExactCall objects in reader
* @throws IOException
*/
public static List<ExactCall> readExactLog(
final BufferedReader reader, final List<Integer> startsToKeep, GenomeLocParser parser)
throws IOException {
if (reader == null) throw new IllegalArgumentException("reader cannot be null");
if (startsToKeep == null) throw new IllegalArgumentException("startsToKeep cannot be null");
if (parser == null) throw new IllegalArgumentException("GenomeLocParser cannot be null");
List<ExactCall> calls = new LinkedList<ExactCall>();
// skip the header line
reader.readLine();
// skip the first "type" line
reader.readLine();
while (true) {
final VariantContextBuilder builder = new VariantContextBuilder();
final List<Allele> alleles = new ArrayList<Allele>();
final List<Genotype> genotypes = new ArrayList<Genotype>();
final double[] posteriors = new double[2];
final double[] priors = MathUtils.normalizeFromLog10(new double[] {0.5, 0.5}, true);
final List<Integer> mle = new ArrayList<Integer>();
final Map<Allele, Double> log10pNonRefByAllele = new HashMap<Allele, Double>();
long runtimeNano = -1;
GenomeLoc currentLoc = null;
while (true) {
final String line = reader.readLine();
if (line == null) return calls;
final String[] parts = line.split("\t");
final GenomeLoc lineLoc = parser.parseGenomeLoc(parts[0]);
final String variable = parts[1];
final String key = parts[2];
final String value = parts[3];
if (currentLoc == null) currentLoc = lineLoc;
if (variable.equals("type")) {
if (startsToKeep.isEmpty() || startsToKeep.contains(currentLoc.getStart())) {
builder.alleles(alleles);
final int stop = currentLoc.getStart() + alleles.get(0).length() - 1;
builder.chr(currentLoc.getContig()).start(currentLoc.getStart()).stop(stop);
builder.genotypes(genotypes);
final int[] mleInts = ArrayUtils.toPrimitive(mle.toArray(new Integer[] {}));
final AFCalcResult result =
new AFCalcResult(mleInts, 1, alleles, posteriors, priors, log10pNonRefByAllele);
calls.add(new ExactCall(builder.make(), runtimeNano, result));
}
break;
} else if (variable.equals("allele")) {
final boolean isRef = key.equals("0");
alleles.add(Allele.create(value, isRef));
} else if (variable.equals("PL")) {
final GenotypeBuilder gb = new GenotypeBuilder(key);
gb.PL(GenotypeLikelihoods.fromPLField(value).getAsPLs());
genotypes.add(gb.make());
} else if (variable.equals("log10PosteriorOfAFEq0")) {
posteriors[0] = Double.valueOf(value);
} else if (variable.equals("log10PosteriorOfAFGt0")) {
posteriors[1] = Double.valueOf(value);
} else if (variable.equals("MLE")) {
mle.add(Integer.valueOf(value));
} else if (variable.equals("pNonRefByAllele")) {
final Allele a = Allele.create(key);
log10pNonRefByAllele.put(a, Double.valueOf(value));
} else if (variable.equals("runtime.nano")) {
runtimeNano = Long.valueOf(value);
} else {
// nothing to do
}
}
}
}
/**
* Compute full calls at a given locus. Entry point for engine calls from the UnifiedGenotyper.
*
* <p>If allSamples != null, then the output variantCallContext is guarenteed to contain a
* genotype for every sample in allSamples. If it's null there's no such guarentee. Providing this
* argument is critical when the resulting calls will be written to a VCF file.
*
* @param tracker the meta data tracker
* @param refContext the reference base
* @param rawContext contextual information around the locus
* @param allSamples set of all sample names that we might call (i.e., those in the VCF header)
* @return the VariantCallContext object
*/
public List<VariantCallContext> calculateLikelihoodsAndGenotypes(
final RefMetaDataTracker tracker,
final ReferenceContext refContext,
final AlignmentContext rawContext,
final Set<String> allSamples) {
final List<VariantCallContext> results = new ArrayList<VariantCallContext>(2);
final List<GenotypeLikelihoodsCalculationModel.Model> models =
getGLModelsToUse(tracker, refContext, rawContext);
final Map<String, org.broadinstitute.sting.utils.genotyper.PerReadAlleleLikelihoodMap>
perReadAlleleLikelihoodMap =
new HashMap<
String, org.broadinstitute.sting.utils.genotyper.PerReadAlleleLikelihoodMap>();
if (models.isEmpty()) {
results.add(
UAC.OutputMode == OUTPUT_MODE.EMIT_ALL_SITES
&& UAC.GenotypingMode
== GenotypeLikelihoodsCalculationModel.GENOTYPING_MODE.GENOTYPE_GIVEN_ALLELES
? generateEmptyContext(tracker, refContext, null, rawContext)
: null);
} else {
for (final GenotypeLikelihoodsCalculationModel.Model model : models) {
perReadAlleleLikelihoodMap.clear();
final Map<String, AlignmentContext> stratifiedContexts =
getFilteredAndStratifiedContexts(UAC, refContext, rawContext, model);
if (stratifiedContexts == null) {
results.add(
UAC.OutputMode == OUTPUT_MODE.EMIT_ALL_SITES
&& UAC.GenotypingMode
== GenotypeLikelihoodsCalculationModel.GENOTYPING_MODE
.GENOTYPE_GIVEN_ALLELES
? generateEmptyContext(tracker, refContext, null, rawContext)
: null);
} else {
final VariantContext vc =
calculateLikelihoods(
tracker,
refContext,
stratifiedContexts,
AlignmentContextUtils.ReadOrientation.COMPLETE,
null,
true,
model,
perReadAlleleLikelihoodMap);
if (vc != null)
results.add(
calculateGenotypes(
tracker,
refContext,
rawContext,
stratifiedContexts,
vc,
model,
true,
perReadAlleleLikelihoodMap));
}
}
}
return results;
}
