// protected basic manipulation routines
private static List<Allele> makeAlleles(Collection<Allele> alleles) {
final List<Allele> alleleList = new ArrayList<Allele>(alleles.size());
boolean sawRef = false;
for (final Allele a : alleles) {
for (final Allele b : alleleList) {
if (a.equals(b, true))
throw new IllegalArgumentException("Duplicate allele added to VariantContext: " + a);
}
// deal with the case where the first allele isn't the reference
if (a.isReference()) {
if (sawRef)
throw new IllegalArgumentException(
"Alleles for a VariantContext must contain at most one reference allele: " + alleles);
alleleList.add(0, a);
sawRef = true;
} else alleleList.add(a);
}
if (alleleList.isEmpty())
throw new IllegalArgumentException(
"Cannot create a VariantContext with an empty allele list");
if (alleleList.get(0).isNonReference())
throw new IllegalArgumentException(
"Alleles for a VariantContext must contain at least one reference allele: " + alleles);
return alleleList;
}
@Test
public void testFixReverseComplementedGenotypes() {
final Allele refA = Allele.create("A", true);
final Allele altC = Allele.create("C", false);
final GenotypesContext originalGenotypes = GenotypesContext.create(3);
originalGenotypes.add(new GenotypeBuilder("homref").alleles(Arrays.asList(refA, refA)).make());
originalGenotypes.add(new GenotypeBuilder("het").alleles(Arrays.asList(refA, altC)).make());
originalGenotypes.add(new GenotypeBuilder("homvar").alleles(Arrays.asList(altC, altC)).make());
final Allele refT = Allele.create("T", true);
final Allele altG = Allele.create("G", false);
final GenotypesContext expectedGenotypes = GenotypesContext.create(3);
expectedGenotypes.add(new GenotypeBuilder("homref").alleles(Arrays.asList(refT, refT)).make());
expectedGenotypes.add(new GenotypeBuilder("het").alleles(Arrays.asList(refT, altG)).make());
expectedGenotypes.add(new GenotypeBuilder("homvar").alleles(Arrays.asList(altG, altG)).make());
final Map<Allele, Allele> reverseComplementAlleleMap = new HashMap<Allele, Allele>(2);
reverseComplementAlleleMap.put(refA, refT);
reverseComplementAlleleMap.put(altC, altG);
final GenotypesContext actualGenotypes =
LiftoverVcf.fixGenotypes(originalGenotypes, reverseComplementAlleleMap);
for (final String sample : Arrays.asList("homref", "het", "homvar")) {
final List<Allele> expected = expectedGenotypes.get(sample).getAlleles();
final List<Allele> actual = actualGenotypes.get(sample).getAlleles();
Assert.assertEquals(expected.get(0), actual.get(0));
Assert.assertEquals(expected.get(1), actual.get(1));
}
}
private static Type typeOfBiallelicVariant(Allele ref, Allele allele) {
if (ref.isSymbolic())
throw new IllegalStateException(
"Unexpected error: encountered a record with a symbolic reference allele");
if (allele.isSymbolic()) return Type.SYMBOLIC;
if (ref.length() == allele.length()) {
if (allele.length() == 1) return Type.SNP;
else return Type.MNP;
}
// Important note: previously we were checking that one allele is the prefix of the other.
// However, that's not an
// appropriate check as can be seen from the following example:
// REF = CTTA and ALT = C,CT,CA
// This should be assigned the INDEL type but was being marked as a MIXED type because of the
// prefix check.
// In truth, it should be absolutely impossible to return a MIXED type from this method because
// it simply
// performs a pairwise comparison of a single alternate allele against the reference allele
// (whereas the MIXED type
// is reserved for cases of multiple alternate alleles of different types). Therefore, if we've
// reached this point
// in the code (so we're not a SNP, MNP, or symbolic allele), we absolutely must be an INDEL.
return Type.INDEL;
// old incorrect logic:
// if (oneIsPrefixOfOther(ref, allele))
// return Type.INDEL;
// else
// return Type.MIXED;
}
protected void printVerboseData(
String pos,
VariantContext vc,
double PofF,
double phredScaledConfidence,
final GenotypeLikelihoodsCalculationModel.Model model) {
Allele refAllele = null, altAllele = null;
for (Allele allele : vc.getAlleles()) {
if (allele.isReference()) refAllele = allele;
else altAllele = allele;
}
for (int i = 0; i <= N; i++) {
StringBuilder AFline = new StringBuilder("AFINFO\t");
AFline.append(pos);
AFline.append("\t");
AFline.append(refAllele);
AFline.append("\t");
if (altAllele != null) AFline.append(altAllele);
else AFline.append("N/A");
AFline.append("\t");
AFline.append(i + "/" + N + "\t");
AFline.append(String.format("%.2f\t", ((float) i) / N));
AFline.append(String.format("%.8f\t", getAlleleFrequencyPriors(model)[i]));
verboseWriter.println(AFline.toString());
}
verboseWriter.println("P(f>0) = " + PofF);
verboseWriter.println("Qscore = " + phredScaledConfidence);
verboseWriter.println();
}
protected final void printCallInfo(
final VariantContext vc,
final double[] log10AlleleFrequencyPriors,
final long runtimeNano,
final AFCalcResult result) {
printCallElement(vc, "type", "ignore", vc.getType());
int allelei = 0;
for (final Allele a : vc.getAlleles())
printCallElement(vc, "allele", allelei++, a.getDisplayString());
for (final Genotype g : vc.getGenotypes())
printCallElement(vc, "PL", g.getSampleName(), g.getLikelihoodsString());
for (int priorI = 0; priorI < log10AlleleFrequencyPriors.length; priorI++)
printCallElement(vc, "priorI", priorI, log10AlleleFrequencyPriors[priorI]);
printCallElement(vc, "runtime.nano", "ignore", runtimeNano);
printCallElement(vc, "log10PosteriorOfAFEq0", "ignore", result.getLog10PosteriorOfAFEq0());
printCallElement(vc, "log10PosteriorOfAFGt0", "ignore", result.getLog10PosteriorOfAFGT0());
for (final Allele allele : result.getAllelesUsedInGenotyping()) {
if (allele.isNonReference()) {
printCallElement(vc, "MLE", allele, result.getAlleleCountAtMLE(allele));
printCallElement(
vc, "pNonRefByAllele", allele, result.getLog10PosteriorOfAFGt0ForAllele(allele));
}
}
callReport.flush();
}
public boolean hasSymbolicAlleles() {
for (final Allele a : getAlleles()) {
if (a.isSymbolic()) {
return true;
}
}
return false;
}
/**
* Returns the number of chromosomes carrying any allele in the genotypes (i.e., excluding
* NO_CALLS)
*
* @return chromosome count
*/
public int getCalledChrCount() {
int n = 0;
for (final Genotype g : getGenotypes()) {
for (final Allele a : g.getAlleles()) n += a.isNoCall() ? 0 : 1;
}
return n;
}
public boolean hasAllele(Allele allele, boolean ignoreRefState) {
if (allele == REF || allele == ALT) // optimization for cached cases
return true;
for (Allele a : getAlleles()) {
if (a.equals(allele, ignoreRefState)) return true;
}
return false;
}
public int[] getGLIndecesOfAlternateAllele(Allele targetAllele) {
int index = 1;
for (Allele allele : getAlternateAlleles()) {
if (allele.equals(targetAllele)) break;
index++;
}
return GenotypeLikelihoods.getPLIndecesOfAlleles(0, index);
}
private Collection<VariantContext> getVariantContexts(
RefMetaDataTracker tracker, ReferenceContext ref) {
List<Feature> features = tracker.getValues(variants, ref.getLocus());
List<VariantContext> VCs = new ArrayList<VariantContext>(features.size());
for (Feature record : features) {
if (VariantContextAdaptors.canBeConvertedToVariantContext(record)) {
// we need to special case the HapMap format because indels aren't handled correctly
if (record instanceof RawHapMapFeature) {
// is it an indel?
RawHapMapFeature hapmap = (RawHapMapFeature) record;
if (hapmap.getAlleles()[0].equals(RawHapMapFeature.NULL_ALLELE_STRING)
|| hapmap.getAlleles()[1].equals(RawHapMapFeature.NULL_ALLELE_STRING)) {
// get the dbsnp object corresponding to this record (needed to help us distinguish
// between insertions and deletions)
VariantContext dbsnpVC = getDbsnp(hapmap.getName());
if (dbsnpVC == null || dbsnpVC.isMixed()) continue;
Map<String, Allele> alleleMap = new HashMap<String, Allele>(2);
alleleMap.put(
RawHapMapFeature.DELETION,
Allele.create(ref.getBase(), dbsnpVC.isSimpleInsertion()));
alleleMap.put(
RawHapMapFeature.INSERTION,
Allele.create(
(char) ref.getBase() + ((RawHapMapFeature) record).getAlleles()[1],
!dbsnpVC.isSimpleInsertion()));
hapmap.setActualAlleles(alleleMap);
// also, use the correct positioning for insertions
hapmap.updatePosition(dbsnpVC.getStart());
if (hapmap.getStart() < ref.getWindow().getStart()) {
logger.warn(
"Hapmap record at "
+ ref.getLocus()
+ " represents an indel too large to be converted; skipping...");
continue;
}
}
}
// ok, we might actually be able to turn this record in a variant context
VariantContext vc =
VariantContextAdaptors.toVariantContext(variants.getName(), record, ref);
if (vc != null) // sometimes the track has odd stuff in it that can't be converted
VCs.add(vc);
}
}
return VCs;
}
private void validateAlleles() {
// check alleles
boolean alreadySeenRef = false, alreadySeenNull = false;
for (Allele allele : alleles) {
// make sure there's only one reference allele
if (allele.isReference()) {
if (alreadySeenRef)
throw new IllegalArgumentException(
"BUG: Received two reference tagged alleles in VariantContext "
+ alleles
+ " this="
+ this);
alreadySeenRef = true;
}
if (allele.isNoCall()) {
throw new IllegalArgumentException(
"BUG: Cannot add a no call allele to a variant context " + alleles + " this=" + this);
}
// make sure there's only one null allele
if (allele.isNull()) {
if (alreadySeenNull)
throw new IllegalArgumentException(
"BUG: Received two null alleles in VariantContext " + alleles + " this=" + this);
alreadySeenNull = true;
}
}
// make sure there's one reference allele
if (!alreadySeenRef)
throw new IllegalArgumentException("No reference allele found in VariantContext");
// if ( getType() == Type.INDEL ) {
// if ( getReference().length() != (getLocation().size()-1) ) {
long length = (stop - start) + 1;
if ((getReference().isNull() && length != 1)
|| (getReference().isNonNull() && (length - getReference().length() > 1))) {
throw new IllegalStateException(
"BUG: GenomeLoc "
+ contig
+ ":"
+ start
+ "-"
+ stop
+ " has a size == "
+ length
+ " but the variation reference allele has length "
+ getReference().length()
+ " this = "
+ this);
}
}
/**
* Gets the sizes of the alternate alleles if they are insertion/deletion events, and returns a
* list of their sizes
*
* @return a list of indel lengths ( null if not of type indel or mixed )
*/
public List<Integer> getIndelLengths() {
if (getType() != Type.INDEL && getType() != Type.MIXED) {
return null;
}
List<Integer> lengths = new ArrayList<Integer>();
for (Allele a : getAlternateAlleles()) {
lengths.add(a.length() - getReference().length());
}
return lengths;
}
private void validateGenotypes() {
if (this.genotypes == null) throw new IllegalStateException("Genotypes is null");
for (final Genotype g : this.genotypes) {
if (g.isAvailable()) {
for (Allele gAllele : g.getAlleles()) {
if (!hasAllele(gAllele) && gAllele.isCalled())
throw new IllegalStateException(
"Allele in genotype " + gAllele + " not in the variant context " + alleles);
}
}
}
}
/**
* helper routine for subcontext
*
* @param genotypes genotypes
* @return allele set
*/
private final Set<Allele> allelesOfGenotypes(Collection<Genotype> genotypes) {
final Set<Allele> alleles = new HashSet<Allele>();
boolean addedref = false;
for (final Genotype g : genotypes) {
for (final Allele a : g.getAlleles()) {
addedref = addedref || a.isReference();
if (a.isCalled()) alleles.add(a);
}
}
if (!addedref) alleles.add(getReference());
return alleles;
}
public static void addComplexGenotypesTest() {
final List<Allele> allAlleles =
Arrays.asList(
Allele.create("A", true), Allele.create("C", false), Allele.create("G", false));
for (int nAlleles : Arrays.asList(2, 3)) {
for (int highestPloidy : Arrays.asList(1, 2, 3)) {
// site alleles
final List<Allele> siteAlleles = allAlleles.subList(0, nAlleles);
// possible alleles for genotypes
final List<Allele> possibleGenotypeAlleles = new ArrayList<Allele>(siteAlleles);
possibleGenotypeAlleles.add(Allele.NO_CALL);
// there are n^ploidy possible genotypes
final List<List<Allele>> possibleGenotypes =
makeAllGenotypes(possibleGenotypeAlleles, highestPloidy);
final int nPossibleGenotypes = possibleGenotypes.size();
VariantContextBuilder vb = new VariantContextBuilder("unittest", "1", 1, 1, siteAlleles);
// first test -- create n copies of each genotype
for (int i = 0; i < nPossibleGenotypes; i++) {
final List<Genotype> samples = new ArrayList<Genotype>(3);
samples.add(GenotypeBuilder.create("sample" + i, possibleGenotypes.get(i)));
add(vb.genotypes(samples));
}
// second test -- create one sample with each genotype
{
final List<Genotype> samples = new ArrayList<Genotype>(nPossibleGenotypes);
for (int i = 0; i < nPossibleGenotypes; i++) {
samples.add(GenotypeBuilder.create("sample" + i, possibleGenotypes.get(i)));
}
add(vb.genotypes(samples));
}
// test mixed ploidy
for (int i = 0; i < nPossibleGenotypes; i++) {
for (int ploidy = 1; ploidy < highestPloidy; ploidy++) {
final List<Genotype> samples = new ArrayList<Genotype>(highestPloidy);
final List<Allele> genotype = possibleGenotypes.get(i).subList(0, ploidy);
samples.add(GenotypeBuilder.create("sample" + i, genotype));
add(vb.genotypes(samples));
}
}
}
}
}
private ReverseClippingPositionTestProvider(
final int expectedClip, final String ref, final String... alleles) {
super(ReverseClippingPositionTestProvider.class);
this.ref = ref;
for (final String allele : alleles) this.alleles.add(Allele.create(allele));
this.expectedClip = expectedClip;
}
private VariantCallContext generateEmptyContext(
RefMetaDataTracker tracker,
ReferenceContext ref,
Map<String, AlignmentContext> stratifiedContexts,
AlignmentContext rawContext) {
VariantContext vc;
if (UAC.GenotypingMode
== GenotypeLikelihoodsCalculationModel.GENOTYPING_MODE.GENOTYPE_GIVEN_ALLELES) {
VariantContext vcInput =
UnifiedGenotyperEngine.getVCFromAllelesRod(
tracker, ref, rawContext.getLocation(), false, logger, UAC.alleles);
if (vcInput == null) return null;
vc =
new VariantContextBuilder(
"UG_call",
ref.getLocus().getContig(),
vcInput.getStart(),
vcInput.getEnd(),
vcInput.getAlleles())
.make();
} else {
// deal with bad/non-standard reference bases
if (!Allele.acceptableAlleleBases(new byte[] {ref.getBase()})) return null;
Set<Allele> alleles = new HashSet<Allele>();
alleles.add(Allele.create(ref.getBase(), true));
vc =
new VariantContextBuilder(
"UG_call",
ref.getLocus().getContig(),
ref.getLocus().getStart(),
ref.getLocus().getStart(),
alleles)
.make();
}
if (annotationEngine != null) {
// Note: we want to use the *unfiltered* and *unBAQed* context for the annotations
final ReadBackedPileup pileup = rawContext.getBasePileup();
stratifiedContexts = AlignmentContextUtils.splitContextBySampleName(pileup);
vc = annotationEngine.annotateContext(tracker, ref, stratifiedContexts, vc);
}
return new VariantCallContext(vc, false);
}
public char getFirstBase(Allele allele) {
byte[] bases = allele.getBases();
if (bases.length > 0) {
return (char) bases[0];
} else {
return '.';
}
}
private static final boolean hasPLIncompatibleAlleles(
final Collection<Allele> alleleSet1, final Collection<Allele> alleleSet2) {
final Iterator<Allele> it1 = alleleSet1.iterator();
final Iterator<Allele> it2 = alleleSet2.iterator();
while (it1.hasNext() && it2.hasNext()) {
final Allele a1 = it1.next();
final Allele a2 = it2.next();
if (!a1.equals(a2)) return true;
}
// by this point, at least one of the iterators is empty. All of the elements
// we've compared are equal up until this point. But it's possible that the
// sets aren't the same size, which is indicated by the test below. If they
// are of the same size, though, the sets are compatible
return it1.hasNext() || it2.hasNext();
}
static boolean someSampleHasDoubleNonReferenceAllele(VariantContext vc1, VariantContext vc2) {
for (final Genotype gt1 : vc1.getGenotypes()) {
Genotype gt2 = vc2.getGenotype(gt1.getSampleName());
List<Allele> site1Alleles = gt1.getAlleles();
List<Allele> site2Alleles = gt2.getAlleles();
Iterator<Allele> all2It = site2Alleles.iterator();
for (Allele all1 : site1Alleles) {
Allele all2 = all2It.next(); // this is OK, since allSamplesAreMergeable()
if (all1.isNonReference() && all2.isNonReference()) // corresponding alleles are alternate
return true;
}
}
return false;
}
private RepeatDetectorTest(
boolean isTrueRepeat, String ref, String refAlleleString, String... altAlleleStrings) {
super(RepeatDetectorTest.class);
this.ref = "N" + ref; // add a dummy base for the event here
this.isTrueRepeat = isTrueRepeat;
List<Allele> alleles = new LinkedList<Allele>();
final Allele refAllele = Allele.create(refAlleleString, true);
alleles.add(refAllele);
for (final String altString : altAlleleStrings) {
final Allele alt = Allele.create(altString, false);
alleles.add(alt);
}
VariantContextBuilder builder =
new VariantContextBuilder("test", "chr1", 1, 1 + refAllele.length(), alleles);
this.vc = builder.make();
}
private Allele ensureMergedAllele(
Allele all1, Allele all2, boolean creatingReferenceForFirstTime) {
AlleleOneAndTwo all12 = new AlleleOneAndTwo(all1, all2);
Allele mergedAllele = mergedAlleles.get(all12);
if (mergedAllele == null) {
byte[] bases1 = all1.getBases();
byte[] bases2 = all2.getBases();
byte[] mergedBases = new byte[bases1.length + intermediateLength + bases2.length];
System.arraycopy(bases1, 0, mergedBases, 0, bases1.length);
if (intermediateBases != null)
System.arraycopy(intermediateBases, 0, mergedBases, bases1.length, intermediateLength);
System.arraycopy(bases2, 0, mergedBases, bases1.length + intermediateLength, bases2.length);
mergedAllele = Allele.create(mergedBases, creatingReferenceForFirstTime);
mergedAlleles.put(all12, mergedAllele);
}
return mergedAllele;
}
/**
* Returns a context identical to this with the REF and ALT alleles reverse complemented.
*
* @param vc variant context
* @return new vc
*/
public static VariantContext reverseComplement(VariantContext vc) {
// create a mapping from original allele to reverse complemented allele
HashMap<Allele, Allele> alleleMap = new HashMap<Allele, Allele>(vc.getAlleles().size());
for (Allele originalAllele : vc.getAlleles()) {
Allele newAllele;
if (originalAllele.isNoCall() || originalAllele.isNull()) newAllele = originalAllele;
else
newAllele =
Allele.create(
BaseUtils.simpleReverseComplement(originalAllele.getBases()),
originalAllele.isReference());
alleleMap.put(originalAllele, newAllele);
}
// create new Genotype objects
GenotypesContext newGenotypes = GenotypesContext.create(vc.getNSamples());
for (final Genotype genotype : vc.getGenotypes()) {
List<Allele> newAlleles = new ArrayList<Allele>();
for (Allele allele : genotype.getAlleles()) {
Allele newAllele = alleleMap.get(allele);
if (newAllele == null) newAllele = Allele.NO_CALL;
newAlleles.add(newAllele);
}
newGenotypes.add(Genotype.modifyAlleles(genotype, newAlleles));
}
return new VariantContextBuilder(vc).alleles(alleleMap.values()).genotypes(newGenotypes).make();
}
public void validateReferenceBases(Allele reference, Byte paddedRefBase) {
if (reference == null) return;
// don't validate if we're a complex event
if (!isComplexIndel() && !reference.isNull() && !reference.basesMatch(getReference())) {
throw new TribbleException.InternalCodecException(
String.format(
"the REF allele is incorrect for the record at position %s:%d, fasta says %s vs. VCF says %s",
getChr(), getStart(), reference.getBaseString(), getReference().getBaseString()));
}
// we also need to validate the padding base for simple indels
if (hasReferenceBaseForIndel() && !getReferenceBaseForIndel().equals(paddedRefBase)) {
throw new TribbleException.InternalCodecException(
String.format(
"the padded REF base is incorrect for the record at position %s:%d, fasta says %s vs. VCF says %s",
getChr(),
getStart(),
(char) paddedRefBase.byteValue(),
(char) getReferenceBaseForIndel().byteValue()));
}
}
static boolean doubleAllelesSegregatePerfectlyAmongSamples(
VariantContext vc1, VariantContext vc2) {
// Check that Alleles at vc1 and at vc2 always segregate together in all samples (including
// reference):
Map<Allele, Allele> allele1ToAllele2 = new HashMap<Allele, Allele>();
Map<Allele, Allele> allele2ToAllele1 = new HashMap<Allele, Allele>();
// Note the segregation of the alleles for the reference genome:
allele1ToAllele2.put(vc1.getReference(), vc2.getReference());
allele2ToAllele1.put(vc2.getReference(), vc1.getReference());
// Note the segregation of the alleles for each sample (and check that it is consistent with the
// reference and all previous samples).
for (final Genotype gt1 : vc1.getGenotypes()) {
Genotype gt2 = vc2.getGenotype(gt1.getSampleName());
List<Allele> site1Alleles = gt1.getAlleles();
List<Allele> site2Alleles = gt2.getAlleles();
Iterator<Allele> all2It = site2Alleles.iterator();
for (Allele all1 : site1Alleles) {
Allele all2 = all2It.next();
Allele all1To2 = allele1ToAllele2.get(all1);
if (all1To2 == null) allele1ToAllele2.put(all1, all2);
else if (!all1To2.equals(all2)) // all1 segregates with two different alleles at site 2
return false;
Allele all2To1 = allele2ToAllele1.get(all2);
if (all2To1 == null) allele2ToAllele1.put(all2, all1);
else if (!all2To1.equals(all1)) // all2 segregates with two different alleles at site 1
return false;
}
}
return true;
}
/**
* Outputs all intervals that are behind the current reference locus
*
* @param refLocus the current reference locus
* @param refBase the reference allele
*/
private void outputFinishedIntervals(final GenomeLoc refLocus, final byte refBase) {
// output any intervals that were finished
final List<GenomeLoc> toRemove = new LinkedList<>();
for (GenomeLoc key : intervalMap.keySet()) {
if (key.isBefore(refLocus)) {
final IntervalStratification intervalStats = intervalMap.get(key);
outputStatsToVCF(intervalStats, Allele.create(refBase, true));
if (hasMissingLoci(intervalStats)) {
outputMissingInterval(intervalStats);
}
toRemove.add(key);
}
}
for (GenomeLoc key : toRemove) {
intervalMap.remove(key);
}
}
private static Allele determineReferenceAllele(List<VariantContext> VCs) {
Allele ref = null;
for (VariantContext vc : VCs) {
Allele myRef = vc.getReference();
if (ref == null || ref.length() < myRef.length()) ref = myRef;
else if (ref.length() == myRef.length() && !ref.equals(myRef))
throw new UserException.BadInput(
String.format(
"The provided variant file(s) have inconsistent references for the same position(s) at %s:%d, %s vs. %s",
vc.getChr(), vc.getStart(), ref, myRef));
}
return ref;
}
@BeforeSuite
public void setup() {
final File referenceFile = new File(b37KGReference);
try {
IndexedFastaSequenceFile seq = new CachingIndexedFastaSequenceFile(referenceFile);
genomeLocParser = new GenomeLocParser(seq);
} catch (FileNotFoundException ex) {
throw new UserException.CouldNotReadInputFile(referenceFile, ex);
}
// alleles
Aref = Allele.create("A", true);
Cref = Allele.create("C", true);
T = Allele.create("T");
C = Allele.create("C");
ATC = Allele.create("ATC");
ATCATC = Allele.create("ATCATC");
}
/**
* 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
}
}
}
}
public void writeBeagleOutput(
VariantContext preferredVC, VariantContext otherVC, boolean isValidationSite, double prior) {
GenomeLoc currentLoc =
VariantContextUtils.getLocation(getToolkit().getGenomeLocParser(), preferredVC);
StringBuffer beagleOut = new StringBuffer();
String marker = String.format("%s:%d ", currentLoc.getContig(), currentLoc.getStart());
beagleOut.append(marker);
if (markers != null)
markers.append(marker).append("\t").append(Integer.toString(markerCounter++)).append("\t");
for (Allele allele : preferredVC.getAlleles()) {
String bglPrintString;
if (allele.isNoCall() || allele.isNull()) bglPrintString = "-";
else bglPrintString = allele.getBaseString(); // get rid of * in case of reference allele
beagleOut.append(String.format("%s ", bglPrintString));
if (markers != null) markers.append(bglPrintString).append("\t");
}
if (markers != null) markers.append("\n");
GenotypesContext preferredGenotypes = preferredVC.getGenotypes();
GenotypesContext otherGenotypes = goodSite(otherVC) ? otherVC.getGenotypes() : null;
for (String sample : samples) {
boolean isMaleOnChrX = CHECK_IS_MALE_ON_CHR_X && getSample(sample).getGender() == Gender.MALE;
Genotype genotype;
boolean isValidation;
// use sample as key into genotypes structure
if (preferredGenotypes.containsSample(sample)) {
genotype = preferredGenotypes.get(sample);
isValidation = isValidationSite;
} else if (otherGenotypes != null && otherGenotypes.containsSample(sample)) {
genotype = otherGenotypes.get(sample);
isValidation = !isValidationSite;
} else {
// there is magically no genotype for this sample.
throw new StingException(
"Sample "
+ sample
+ " arose with no genotype in variant or validation VCF. This should never happen.");
}
/*
* Use likelihoods if: is validation, prior is negative; or: is not validation, has genotype key
*/
double[] log10Likelihoods = null;
if ((isValidation && prior < 0.0) || genotype.hasLikelihoods()) {
log10Likelihoods = genotype.getLikelihoods().getAsVector();
// see if we need to randomly mask out genotype in this position.
if (GenomeAnalysisEngine.getRandomGenerator().nextDouble() <= insertedNoCallRate) {
// we are masking out this genotype
log10Likelihoods =
isMaleOnChrX ? HAPLOID_FLAT_LOG10_LIKELIHOODS : DIPLOID_FLAT_LOG10_LIKELIHOODS;
}
if (isMaleOnChrX) {
log10Likelihoods[1] = -255; // todo -- warning this is dangerous for multi-allele case
}
}
/** otherwise, use the prior uniformly */
else if (!isValidation && genotype.isCalled() && !genotype.hasLikelihoods()) {
// hack to deal with input VCFs with no genotype likelihoods. Just assume the called
// genotype
// is confident. This is useful for Hapmap and 1KG release VCFs.
double AA = (1.0 - prior) / 2.0;
double AB = (1.0 - prior) / 2.0;
double BB = (1.0 - prior) / 2.0;
if (genotype.isHomRef()) {
AA = prior;
} else if (genotype.isHet()) {
AB = prior;
} else if (genotype.isHomVar()) {
BB = prior;
}
log10Likelihoods = MathUtils.toLog10(new double[] {AA, isMaleOnChrX ? 0.0 : AB, BB});
} else {
log10Likelihoods =
isMaleOnChrX ? HAPLOID_FLAT_LOG10_LIKELIHOODS : DIPLOID_FLAT_LOG10_LIKELIHOODS;
}
writeSampleLikelihoods(beagleOut, preferredVC, log10Likelihoods);
}
beagleWriter.println(beagleOut.toString());
}
