Examples with VCFInfoHeaderLine htsjdk.variant.vcf.VCFInfoHeaderLine used on opensource projects

Example 21 with VCFInfoHeaderLine

use of htsjdk.variant.vcf.VCFInfoHeaderLine in project jvarkit by lindenb.

the class AnnPredictionParserFactory method createDefaultParser.

/**
 * create a parser without the VCF header
 */
public AnnPredictionParser createDefaultParser() {
    final VCFHeader tmpheader = new VCFHeader();
    final VCFInfoHeaderLine info = new VCFInfoHeaderLine(AnnPredictionParser.getDefaultTag(), VCFHeaderLineCount.UNBOUNDED, VCFHeaderLineType.String, "");
    tmpheader.addMetaDataLine(info);
    return new AnnPredictionParser(tmpheader, getTag());
}

Example 22 with VCFInfoHeaderLine

use of htsjdk.variant.vcf.VCFInfoHeaderLine in project jvarkit by lindenb.

the class VcfCalledWithAnotherMethod method doVcfToVcf.

protected int doVcfToVcf(final String inputName, final VcfIterator in, final VariantContextWriter out) {
    final List<ExternalVcf> externalVcfs = new ArrayList<>();
    try {
        final VCFHeader header = in.getHeader();
        this.dictionary = header.getSequenceDictionary();
        /**
         * open primitive input
         */
        if (this.dictionary == null) {
            LOG.error("no dictionary in input");
            return -1;
        }
        final Set<File> samtoolsFiles = new HashSet<>();
        this.externalVcfStrs.stream().filter(S -> S.endsWith(".list")).map(S -> Paths.get(S)).forEach(P -> {
            try {
                samtoolsFiles.addAll(Files.readAllLines(P).stream().filter(L -> !(L.startsWith("#") || L.trim().isEmpty())).map(S -> new File(S)).collect(Collectors.toSet()));
            } catch (final Exception err) {
                throw new RuntimeIOException(err);
            }
        });
        samtoolsFiles.addAll(this.externalVcfStrs.stream().filter(S -> !S.endsWith(".list")).map(S -> new File(S)).collect(Collectors.toSet()));
        externalVcfs.addAll(samtoolsFiles.stream().map(F -> new ExternalVcf(F)).collect(Collectors.toList()));
        /**
         * check for uniq keys
         */
        final Set<String> uniqKeys = new HashSet<>();
        for (final ExternalVcf extvcf : externalVcfs) {
            int n = 0;
            for (; ; ) {
                final String newkey = extvcf.key + (n == 0 ? "" : "_" + n);
                if (!uniqKeys.contains(newkey)) {
                    extvcf.key = newkey;
                    uniqKeys.add(newkey);
                    break;
                }
                ++n;
            }
        }
        final VCFHeader h2 = new VCFHeader(header);
        for (final ExternalVcf extvcf : externalVcfs) {
            h2.addMetaDataLine(new VCFHeaderLine("otherVcf:" + extvcf.key, extvcf.vcfFile.getPath()));
        }
        final VCFFilterHeaderLine variantNotFoundElsewhereFILTER = (filterNameVariantNotFoundElseWhere.isEmpty() ? null : new VCFFilterHeaderLine(filterNameVariantNotFoundElseWhere, "Variant Was not found in other VCFs: " + externalVcfs.stream().map(S -> S.vcfFile.getPath()).collect(Collectors.joining(", "))));
        if (variantNotFoundElsewhereFILTER != null) {
            h2.addMetaDataLine(variantNotFoundElsewhereFILTER);
        }
        final VCFInfoHeaderLine variantFoundElseWhereKeys = new VCFInfoHeaderLine(this.infoFoundKey, VCFHeaderLineCount.UNBOUNDED, VCFHeaderLineType.String, "Variant was found in the VCFs designed by those keys");
        h2.addMetaDataLine(variantFoundElseWhereKeys);
        final VCFInfoHeaderLine variantFoundElseWhereCount = new VCFInfoHeaderLine(this.infoFoundKey, 1, VCFHeaderLineType.Integer, "Number of times the Variant was found  in the VCFs");
        h2.addMetaDataLine(variantFoundElseWhereCount);
        final VCFFormatHeaderLine genotypeCountSame = new VCFFormatHeaderLine(this.formatCountSame, 1, VCFHeaderLineType.Integer, "Number of times the Genotype was found the same in other VCFs");
        h2.addMetaDataLine(genotypeCountSame);
        final VCFFormatHeaderLine genotypeCountDiscordant = new VCFFormatHeaderLine(this.formatCountDiscordant, 1, VCFHeaderLineType.Integer, "Number of times the Genotype was found dicordant in other VCFs");
        h2.addMetaDataLine(genotypeCountDiscordant);
        super.addMetaData(h2);
        final VariantContextWriter w = super.openVariantContextWriter(outputFile);
        w.writeHeader(h2);
        final SAMSequenceDictionaryProgress progress = new SAMSequenceDictionaryProgress(this.dictionary);
        while (in.hasNext()) {
            final VariantContext ctx = progress.watch(in.next());
            final List<GenotypeCount> genotypeCounts = ctx.getGenotypes().stream().map(G -> new GenotypeCount(G)).collect(Collectors.toList());
            final VariantContextBuilder vcb = new VariantContextBuilder(ctx);
            final Set<String> variantFoundInOtherVcfs = new HashSet<>();
            for (final ExternalVcf extvcf : externalVcfs) {
                final List<VariantContext> otherVariants = extvcf.get(ctx);
                if (otherVariants.stream().filter(CTX2 -> {
                    if (ctx.getAlternateAlleles().isEmpty())
                        return true;
                    for (final Allele a : ctx.getAlternateAlleles()) {
                        if (CTX2.hasAllele(a))
                            return true;
                    }
                    return false;
                }).findAny().isPresent()) {
                    variantFoundInOtherVcfs.add(extvcf.key);
                }
                for (final GenotypeCount gt : genotypeCounts) {
                    for (final VariantContext otherVariant : otherVariants) {
                        final Genotype otherGt = otherVariant.getGenotype(gt.gt.getSampleName());
                        if (otherGt == null)
                            continue;
                        if (gt.gt.sameGenotype(otherGt) || (this.noCallSameAsHomRef && ((gt.gt.isNoCall() && otherGt.isHomRef()) || (gt.gt.isHomRef() && otherGt.isNoCall())))) {
                            gt.countSame++;
                        } else {
                            gt.countDiscordant++;
                        }
                    }
                }
            }
            vcb.genotypes(genotypeCounts.stream().map(G -> {
                final GenotypeBuilder gb = new GenotypeBuilder(G.gt);
                gb.attribute(genotypeCountSame.getID(), G.countSame);
                gb.attribute(genotypeCountDiscordant.getID(), G.countDiscordant);
                return gb.make();
            }).collect(Collectors.toList()));
            vcb.attribute(variantFoundElseWhereCount.getID(), variantFoundInOtherVcfs.size());
            if (variantFoundInOtherVcfs.isEmpty()) {
                if (variantNotFoundElsewhereFILTER != null) {
                    vcb.filter(variantNotFoundElsewhereFILTER.getID());
                }
            } else {
                if (variantNotFoundElsewhereFILTER != null && !ctx.isFiltered()) {
                    vcb.passFilters();
                }
                vcb.attribute(variantFoundElseWhereKeys.getID(), new ArrayList<>(variantFoundInOtherVcfs));
            }
            w.add(vcb.make());
        }
        progress.finish();
        while (!externalVcfs.isEmpty()) externalVcfs.remove(0).close();
        return RETURN_OK;
    } catch (Exception err) {
        LOG.error(err);
        return -1;
    } finally {
        while (!externalVcfs.isEmpty()) externalVcfs.remove(0).close();
    }
}

Example 23 with VCFInfoHeaderLine

use of htsjdk.variant.vcf.VCFInfoHeaderLine in project jvarkit by lindenb.

the class VcfFilterXPath method doVcfToVcf.

@Override
protected int doVcfToVcf(String inputName, VcfIterator in, VariantContextWriter out) {
    try {
        // TODO in jdk8 replace with http://docs.oracle.com/javase/8/docs/api/java/util/Base64.html
        VCFHeader header = in.getHeader();
        VCFInfoHeaderLine infoHeader = header.getInfoHeaderLine(this.infoTag);
        if (infoHeader == null) {
            LOG.warning("No INFO header line for " + this.infoTag + " in " + inputName);
        } else if (!(infoHeader.getCountType() == VCFHeaderLineCount.INTEGER && infoHeader.getCount() == 1 && infoHeader.getType() == VCFHeaderLineType.String)) {
            LOG.warning("Bad definition of INFO header line for " + this.infoTag + " in " + inputName + " expected one 'string' got " + infoHeader);
            infoHeader = null;
        }
        VCFHeader h2 = new VCFHeader(header);
        h2.addMetaDataLine(new VCFHeaderLine(getClass().getSimpleName() + "CmdLine", String.valueOf(getProgramCommandLine())));
        h2.addMetaDataLine(new VCFHeaderLine(getClass().getSimpleName() + "Version", String.valueOf(getVersion())));
        h2.addMetaDataLine(new VCFHeaderLine(getClass().getSimpleName() + "HtsJdkVersion", HtsjdkVersion.getVersion()));
        h2.addMetaDataLine(new VCFHeaderLine(getClass().getSimpleName() + "HtsJdkHome", HtsjdkVersion.getHome()));
        SAMSequenceDictionaryProgress progess = new SAMSequenceDictionaryProgress(header.getSequenceDictionary());
        out.writeHeader(h2);
        while (in.hasNext()) {
            VariantContext ctx = progess.watch(in.next());
            if (// no tag in header
            infoHeader == null) {
                out.add(ctx);
                continue;
            }
            Object o = ctx.getAttribute(this.infoTag);
            if (o == null) {
                out.add(ctx);
                continue;
            }
            StringBuilder base64 = new StringBuilder(o.toString());
            while (base64.length() % 4 != 0) base64.append('=');
            ByteArrayInputStream xmlBytes = new ByteArrayInputStream(Base64.getDecoder().decode(base64.toString()));
            InputSource inputSource = new InputSource(xmlBytes);
            xpathVariableMap.put(new QName("chrom"), ctx.getContig());
            xpathVariableMap.put(new QName("start"), ctx.getStart());
            xpathVariableMap.put(new QName("end"), ctx.getEnd());
            xpathVariableMap.put(new QName("id"), ctx.hasID() ? ctx.getID() : ".");
            boolean accept = (Boolean) xpathExpr.evaluate(inputSource, XPathConstants.BOOLEAN);
            if (accept) {
                out.add(ctx);
            }
            if (out.checkError())
                break;
        }
        progess.finish();
        return 0;
    } catch (Exception err) {
        LOG.error(err);
        return -1;
    } finally {
        xpathVariableMap.clear();
    }
}

Example 24 with VCFInfoHeaderLine

use of htsjdk.variant.vcf.VCFInfoHeaderLine in project jvarkit by lindenb.

the class IndexCovToVcf method doWork.

@Override
public int doWork(final List<String> args) {
    if (this.deletionTreshold >= 1.0f) {
        LOG.error("Bad deletion treshold >=1.0");
        return -1;
    }
    if (this.duplicationTreshold <= 1.0f) {
        LOG.error("Bad duplication treshold <=1.0");
        return -1;
    }
    if (this.deletionTreshold >= this.duplicationTreshold) {
        LOG.error("Bad tresholds del>=dup");
        return -1;
    }
    final Pattern tab = Pattern.compile("[\t]");
    BufferedReader r = null;
    VariantContextWriter vcw = null;
    try {
        final SAMSequenceDictionary dict;
        if (this.refFile == null) {
            dict = null;
        } else {
            dict = SAMSequenceDictionaryExtractor.extractDictionary(this.refFile);
            if (dict == null) {
                LOG.error("Cannot find dict in " + this.refFile);
                return -1;
            }
        }
        r = super.openBufferedReader(oneFileOrNull(args));
        String line = r.readLine();
        if (line == null) {
            LOG.error("Cannot read first line of input");
            return -1;
        }
        String[] tokens = tab.split(line);
        if (tokens.length < 4 || !tokens[0].equals("#chrom") || !tokens[1].equals("start") || !tokens[2].equals("end")) {
            LOG.error("bad first line " + line);
            return -1;
        }
        final Set<VCFHeaderLine> metaData = new HashSet<>();
        VCFStandardHeaderLines.addStandardFormatLines(metaData, true, "GT");
        VCFStandardHeaderLines.addStandardInfoLines(metaData, true, "END");
        final VCFFormatHeaderLine foldHeader = new VCFFormatHeaderLine("F", 1, VCFHeaderLineType.Float, "Relative number of copy: 0.5 deletion 1 normal 2.0 duplication");
        metaData.add(foldHeader);
        final VCFFormatHeaderLine formatIsDeletion = new VCFFormatHeaderLine("DEL", 1, VCFHeaderLineType.Integer, "set to 1 if relative number of copy <= " + this.deletionTreshold);
        metaData.add(formatIsDeletion);
        final VCFFormatHeaderLine formatIsDuplication = new VCFFormatHeaderLine("DUP", 1, VCFHeaderLineType.Integer, "set to 1 if relative number of copy >= " + this.duplicationTreshold);
        metaData.add(formatIsDuplication);
        final VCFFilterHeaderLine filterAllDel = new VCFFilterHeaderLine("ALL_DEL", "number of samples greater than 1 and all are deletions");
        metaData.add(filterAllDel);
        final VCFFilterHeaderLine filterAllDup = new VCFFilterHeaderLine("ALL_DUP", "number of samples  greater than  1 and all are duplication");
        metaData.add(filterAllDup);
        final VCFFilterHeaderLine filterNoSV = new VCFFilterHeaderLine("NO_SV", "There is no DUP or DEL in this variant");
        metaData.add(filterNoSV);
        final VCFInfoHeaderLine infoNumDup = new VCFInfoHeaderLine("NDUP", 1, VCFHeaderLineType.Integer, "Number of samples being duplicated");
        metaData.add(infoNumDup);
        final VCFInfoHeaderLine infoNumDel = new VCFInfoHeaderLine("NDEL", 1, VCFHeaderLineType.Integer, "Number of samples being deleted");
        metaData.add(infoNumDel);
        final List<String> samples = Arrays.asList(tokens).subList(3, tokens.length);
        final VCFHeader vcfHeader = new VCFHeader(metaData, samples);
        if (dict != null) {
            vcfHeader.setSequenceDictionary(dict);
        }
        vcw = super.openVariantContextWriter(outputFile);
        vcw.writeHeader(vcfHeader);
        // final List<Allele> NO_CALL_NO_CALL = Arrays.asList(Allele.NO_CALL,Allele.NO_CALL);
        final Allele DUP_ALLELE = Allele.create("<DUP>", false);
        final Allele DEL_ALLELE = Allele.create("<DEL>", false);
        final Allele REF_ALLELE = Allele.create("N", true);
        while ((line = r.readLine()) != null) {
            if (StringUtil.isBlank(line))
                continue;
            tokens = tab.split(line);
            if (tokens.length != 3 + samples.size()) {
                throw new JvarkitException.TokenErrors("expected " + (samples.size() + 3) + "columns.", tokens);
            }
            final Set<Allele> alleles = new HashSet<>();
            alleles.add(REF_ALLELE);
            final VariantContextBuilder vcb = new VariantContextBuilder();
            vcb.chr(tokens[0]);
            vcb.start(Integer.parseInt(tokens[1]));
            final int chromEnd = Integer.parseInt(tokens[2]);
            vcb.stop(chromEnd);
            vcb.attribute(VCFConstants.END_KEY, chromEnd);
            if (dict != null) {
                final SAMSequenceRecord ssr = dict.getSequence(tokens[0]);
                if (ssr == null) {
                    LOG.error(JvarkitException.ContigNotFoundInDictionary.getMessage(tokens[0], dict));
                    return -1;
                }
                if (chromEnd > ssr.getSequenceLength()) {
                    LOG.warn("WARNING sequence length in " + line + " is greater than in dictionary ");
                }
            }
            int count_dup = 0;
            int count_del = 0;
            final List<Genotype> genotypes = new ArrayList<>(samples.size());
            for (int i = 3; i < tokens.length; i++) {
                final float f = Float.parseFloat(tokens[i]);
                if (f < 0 || Float.isNaN(f) || !Float.isFinite(f)) {
                    LOG.error("Bad fold " + f + " in " + line);
                }
                final GenotypeBuilder gb;
                if (f <= this.deletionTreshold) {
                    gb = new GenotypeBuilder(samples.get(i - 3), Collections.singletonList(DEL_ALLELE));
                    alleles.add(DEL_ALLELE);
                    gb.attribute(formatIsDeletion.getID(), 1);
                    count_del++;
                } else if (f >= this.duplicationTreshold) {
                    gb = new GenotypeBuilder(samples.get(i - 3), Collections.singletonList(DUP_ALLELE));
                    alleles.add(DUP_ALLELE);
                    gb.attribute(formatIsDuplication.getID(), 1);
                    count_dup++;
                } else {
                    gb = new GenotypeBuilder(samples.get(i - 3), Collections.singletonList(REF_ALLELE));
                    gb.attribute(formatIsDuplication.getID(), 0);
                }
                gb.attribute(foldHeader.getID(), f);
                genotypes.add(gb.make());
            }
            vcb.alleles(alleles);
            vcb.genotypes(genotypes);
            if (count_dup == samples.size() && samples.size() != 1) {
                vcb.filter(filterAllDup.getID());
            }
            if (count_del == samples.size() && samples.size() != 1) {
                vcb.filter(filterAllDel.getID());
            }
            if (count_dup == 0 && count_del == 0) {
                vcb.filter(filterNoSV.getID());
            }
            vcb.attribute(infoNumDel.getID(), count_del);
            vcb.attribute(infoNumDup.getID(), count_dup);
            vcw.add(vcb.make());
        }
        vcw.close();
        vcw = null;
        r.close();
        r = null;
        return 0;
    } catch (final Exception err) {
        LOG.error(err);
        return -1;
    } finally {
        CloserUtil.close(r);
        CloserUtil.close(vcw);
    }
}

Example 25 with VCFInfoHeaderLine

use of htsjdk.variant.vcf.VCFInfoHeaderLine in project jvarkit by lindenb.

the class SamFindClippedRegions method doWork.

/*private static boolean closeTo(int pos1,int pos2, int max)
		{
		return Math.abs(pos2-pos1)<=max;
		}*/
/*
	private static boolean same(char c1,char c2)
		{
		if(c1=='N' || c2=='N') return false;
		return Character.toUpperCase(c1)==Character.toUpperCase(c2);
		}*/
@Override
public int doWork(List<String> args) {
    int readLength = 150;
    if (args.isEmpty()) {
        LOG.error("illegal.number.of.arguments");
        return -1;
    }
    List<Input> inputs = new ArrayList<Input>();
    VariantContextWriter w = null;
    // SAMFileWriter w=null;
    try {
        SAMSequenceDictionary dict = null;
        /* create input, collect sample names */
        Map<String, Input> sample2input = new HashMap<String, Input>();
        for (final String filename : args) {
            Input input = new Input(new File(filename));
            // input.index=inputs.size();
            inputs.add(input);
            if (sample2input.containsKey(input.sampleName)) {
                LOG.error("Duplicate sample " + input.sampleName + " in " + input.bamFile + " and " + sample2input.get(input.sampleName).bamFile);
                return -1;
            }
            sample2input.put(input.sampleName, input);
            if (dict == null) {
                dict = input.header.getSequenceDictionary();
            } else if (!SequenceUtil.areSequenceDictionariesEqual(dict, input.header.getSequenceDictionary())) {
                LOG.error("Found more than one dictint sequence dictionary");
                return -1;
            }
        }
        LOG.info("Sample N= " + sample2input.size());
        /* create merged iterator */
        List<SAMFileHeader> headers = new ArrayList<SAMFileHeader>(sample2input.size());
        for (Input input : inputs) headers.add(input.header);
        SamFileHeaderMerger headerMerger = new SamFileHeaderMerger(SortOrder.coordinate, headers, true);
        List<SamReader> readers = new ArrayList<SamReader>(sample2input.size());
        for (Input input : inputs) readers.add(input.samFileReaderScan);
        MergingSamRecordIterator merginIter = new MergingSamRecordIterator(headerMerger, readers, true);
        Allele reference_allele = Allele.create("N", true);
        Allele[] alternate_alleles = new Allele[] { Allele.create("<CLIP5>", false), Allele.create("<CLIP3>", false) };
        Set<VCFHeaderLine> vcfHeaderLines = new HashSet<VCFHeaderLine>();
        for (Allele alt : alternate_alleles) {
            vcfHeaderLines.add(new VCFSimpleHeaderLine("<ID=" + alt.getDisplayString() + ",Description=\"StructVar\">", VCFHeaderVersion.VCF4_1, VCFConstants.ALT_HEADER_START.substring(2), Arrays.asList("ID", "Description")));
        }
        vcfHeaderLines.add(new VCFInfoHeaderLine("COUNT_SAMPLES", 1, VCFHeaderLineType.Integer, "Number of samples with  depth>=" + this.min_depth));
        vcfHeaderLines.add(new VCFInfoHeaderLine(VCFConstants.DEPTH_KEY, 1, VCFHeaderLineType.Integer, "Approximate read depth."));
        vcfHeaderLines.add(new VCFFormatHeaderLine(VCFConstants.GENOTYPE_KEY, 1, VCFHeaderLineType.String, "Genotype"));
        vcfHeaderLines.add(new VCFFormatHeaderLine(VCFConstants.DEPTH_KEY, 1, VCFHeaderLineType.Integer, "Approximate read depth"));
        vcfHeaderLines.add(new VCFHeaderLine(getClass().getSimpleName() + "CmdLine", String.valueOf(getProgramCommandLine())));
        vcfHeaderLines.add(new VCFHeaderLine(getClass().getSimpleName() + "Version", String.valueOf(getVersion())));
        for (int side = 0; side < 2; ++side) {
            vcfHeaderLines.add(new VCFFormatHeaderLine("CN" + (side == 0 ? 5 : 3), 1, VCFHeaderLineType.Integer, "count clipped in " + (side == 0 ? 5 : 3) + "'"));
        }
        if (dict != null) {
            vcfHeaderLines.addAll(VCFUtils.samSequenceDictToVCFContigHeaderLine(dict));
        }
        VCFHeader vcfHeader = new VCFHeader(vcfHeaderLines, sample2input.keySet());
        w = VCFUtils.createVariantContextWriterToStdout();
        w.writeHeader(vcfHeader);
        final IntervalTreeMap<Boolean> intervals = new IntervalTreeMap<>();
        // w=swf.make(header, System.out);
        SAMSequenceDictionaryProgress progress = new SAMSequenceDictionaryProgress(dict);
        if (bedFile != null) {
            final BedLineCodec bedLineCodec = new BedLineCodec();
            LOG.info("Reading " + bedFile);
            BufferedReader r = IOUtils.openFileForBufferedReading(bedFile);
            String line;
            while ((line = r.readLine()) != null) {
                BedLine bedLine = bedLineCodec.decode(line);
                if (bedLine == null)
                    continue;
                if (dict != null && dict.getSequence(bedLine.getContig()) == null) {
                    LOG.warning("undefined chromosome  in " + bedFile + " " + line);
                    continue;
                }
                intervals.put(bedLine.toInterval(), true);
            }
            CloserUtil.close(r);
        }
        LinkedList<SAMRecord> buffer = new LinkedList<SAMRecord>();
        final Predicate<SAMRecord> filterSamRecords = new Predicate<SAMRecord>() {

            @Override
            public boolean test(SAMRecord rec) {
                if (rec.getReadUnmappedFlag())
                    return false;
                if (rec.isSecondaryOrSupplementary())
                    return false;
                if (rec.getDuplicateReadFlag())
                    return false;
                if (rec.getReadFailsVendorQualityCheckFlag())
                    return false;
                Cigar cigar = rec.getCigar();
                if (cigar == null || cigar.numCigarElements() < 2)
                    return false;
                boolean found_S = false;
                for (int side = 0; side < 2; ++side) {
                    CigarElement ce = cigar.getCigarElement(side == 0 ? 0 : cigar.numCigarElements() - 1);
                    // read must be clipped on 5' or 3' with a good length
                    if (!ce.getOperator().equals(CigarOperator.S))
                        continue;
                    found_S = true;
                    break;
                }
                if (!found_S)
                    return false;
                SAMReadGroupRecord g = rec.getReadGroup();
                if (g == null || g.getSample() == null || g.getSample().isEmpty())
                    return false;
                return true;
            }
        };
        final FilteringIterator<SAMRecord> forwardIterator = new FilteringIterator<SAMRecord>(merginIter, filterSamRecords);
        for (; ; ) {
            SAMRecord rec = null;
            if (forwardIterator.hasNext()) {
                rec = forwardIterator.next();
                progress.watch(rec);
                if (intervals != null && !intervals.containsOverlapping(new Interval(rec.getReferenceName(), rec.getAlignmentStart(), rec.getAlignmentEnd())))
                    continue;
            }
            // need to flush buffer ?
            if (rec == null || (!buffer.isEmpty() && !buffer.getLast().getReferenceIndex().equals(rec.getReferenceIndex())) || (!buffer.isEmpty() && buffer.getLast().getUnclippedEnd() + readLength < rec.getUnclippedStart())) {
                if (!buffer.isEmpty()) {
                    int chromStart = buffer.getFirst().getUnclippedStart();
                    int chromEnd = buffer.getFirst().getUnclippedEnd();
                    for (SAMRecord sam : buffer) {
                        chromStart = Math.min(chromStart, sam.getUnclippedStart());
                        chromEnd = Math.max(chromEnd, sam.getUnclippedEnd());
                    }
                    final int winShift = 5;
                    for (int pos = chromStart; pos + winShift <= chromEnd; pos += winShift) {
                        int[] count_big_clip = new int[] { 0, 0 };
                        // int max_depth[]=new int[]{0,0};
                        List<Genotype> genotypes = new ArrayList<Genotype>();
                        Set<Allele> all_alleles = new HashSet<Allele>();
                        all_alleles.add(reference_allele);
                        boolean found_one_depth_ok = false;
                        int sum_depth = 0;
                        int samples_with_high_depth = 0;
                        for (String sample : sample2input.keySet()) {
                            GenotypeBuilder gb = new GenotypeBuilder(sample);
                            int[] count_clipped = new int[] { 0, 0 };
                            Set<Allele> sample_alleles = new HashSet<Allele>(3);
                            for (int side = 0; side < 2; ++side) {
                                for (SAMRecord sam : buffer) {
                                    if (!sam.getReadGroup().getSample().equals(sample))
                                        continue;
                                    Cigar cigar = sam.getCigar();
                                    CigarElement ce = cigar.getCigarElement(side == 0 ? 0 : cigar.numCigarElements() - 1);
                                    if (!ce.getOperator().equals(CigarOperator.S))
                                        continue;
                                    int clipStart = (side == 0 ? sam.getUnclippedStart() : sam.getAlignmentEnd() + 1);
                                    int clipEnd = (side == 0 ? sam.getAlignmentStart() - 1 : sam.getUnclippedEnd());
                                    if ((pos + winShift < clipStart || pos > clipEnd))
                                        continue;
                                    count_clipped[side]++;
                                    if (ce.getLength() >= this.min_clip_length) {
                                        count_big_clip[side]++;
                                    }
                                    sample_alleles.add(alternate_alleles[side]);
                                    gb.attribute("CN" + (side == 0 ? 5 : 3), count_clipped[side]);
                                }
                            }
                            // if(!(found_one_big_clip[0] || found_one_big_clip[1])) continue;
                            if (count_clipped[0] + count_clipped[1] == 0)
                                continue;
                            if ((count_clipped[0] + count_clipped[1]) > min_depth) {
                                found_one_depth_ok = true;
                                ++samples_with_high_depth;
                            }
                            sum_depth += (count_clipped[0] + count_clipped[1]);
                            gb.alleles(new ArrayList<Allele>(sample_alleles));
                            all_alleles.addAll(sample_alleles);
                            gb.DP(count_clipped[0] + count_clipped[1]);
                            genotypes.add(gb.make());
                        }
                        if (all_alleles.size() == 1) {
                            // all homozygotes
                            continue;
                        }
                        if (!found_one_depth_ok) {
                            continue;
                        }
                        if (!(count_big_clip[0] >= 1 || count_big_clip[1] >= 1)) {
                            continue;
                        }
                        Map<String, Object> atts = new HashMap<String, Object>();
                        atts.put("COUNT_SAMPLES", samples_with_high_depth);
                        atts.put(VCFConstants.DEPTH_KEY, sum_depth);
                        VariantContextBuilder vcb = new VariantContextBuilder();
                        vcb.chr(buffer.getFirst().getReferenceName());
                        vcb.start(pos);
                        vcb.stop(pos + winShift);
                        vcb.alleles(all_alleles);
                        vcb.attributes(atts);
                        vcb.genotypes(genotypes);
                        w.add(vcb.make());
                    }
                    buffer.clear();
                }
                if (rec == null) {
                    break;
                }
            }
            buffer.add(rec);
        }
        merginIter.close();
        progress.finish();
        return 0;
    } catch (Exception err) {
        LOG.error(err);
        return -1;
    } finally {
        for (Input input : inputs) {
            CloserUtil.close(input);
        }
    }
}