Examples with BinaryCodec htsjdk.samtools.util.BinaryCodec used on opensource projects

Example 1 with BinaryCodec

use of htsjdk.samtools.util.BinaryCodec in project gatk by broadinstitute.

the class SparkUtils method writeBAMHeaderToStream.

/**
     * Private helper method for {@link #convertHeaderlessHadoopBamShardToBam} that takes a SAMFileHeader and writes it
     * to the provided `OutputStream`, correctly encoded for the BAM format and preceded by the BAM magic bytes.
     *
     * @param samFileHeader SAM header to write
     * @param outputStream stream to write the SAM header to
     */
private static void writeBAMHeaderToStream(final SAMFileHeader samFileHeader, final OutputStream outputStream) {
    final BlockCompressedOutputStream blockCompressedOutputStream = new BlockCompressedOutputStream(outputStream, null);
    final BinaryCodec outputBinaryCodec = new BinaryCodec(new DataOutputStream(blockCompressedOutputStream));
    final String headerString;
    final Writer stringWriter = new StringWriter();
    new SAMTextHeaderCodec().encode(stringWriter, samFileHeader, true);
    headerString = stringWriter.toString();
    outputBinaryCodec.writeBytes(ReadUtils.BAM_MAGIC);
    // calculate and write the length of the SAM file header text and the header text
    outputBinaryCodec.writeString(headerString, true, false);
    // write the sequences binarily.  This is redundant with the text header
    outputBinaryCodec.writeInt(samFileHeader.getSequenceDictionary().size());
    for (final SAMSequenceRecord sequenceRecord : samFileHeader.getSequenceDictionary().getSequences()) {
        outputBinaryCodec.writeString(sequenceRecord.getSequenceName(), true, true);
        outputBinaryCodec.writeInt(sequenceRecord.getSequenceLength());
    }
    try {
        blockCompressedOutputStream.flush();
    } catch (final IOException ioe) {
        throw new RuntimeIOException(ioe);
    }
}