Class: HTS::Bam

Inherits:
Hts
  • Object
show all
Includes:
Enumerable
Defined in:
lib/hts/bam.rb,
lib/hts/bam/aux.rb,
lib/hts/bam/flag.rb,
lib/hts/bam/cigar.rb,
lib/hts/bam/header.rb,
lib/hts/bam/record.rb

Overview

A class for working with SAM, BAM, CRAM files.

Defined Under Namespace

Classes: Aux, Cigar, Flag, Header, Record

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Hts

#closed?, #file_format, #file_format_version, #rewind, #seek, #set_threads, #struct, #tell, #to_ptr

Constructor Details

#initialize(file_name, mode = "r", index: nil, fai: nil, threads: nil, create_index: false) ⇒ Bam

Returns a new instance of Bam.

Raises:

  • (Errno::ENOENT) 


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# File 'lib/hts/bam.rb', line 30

def initialize(file_name, mode = "r", index: nil, fai: nil, threads: nil,
               create_index: false)
  if block_given?
    message = "HTS::Bam.new() dose not take block; Please use HTS::Bam.open() instead"
    raise message
  end

  # NOTE: Do not check for the existence of local files, since file_names may be remote URIs.

  @file_name  = file_name
  @index_name = index
  @mode       = mode
  @hts_file   = LibHTS.hts_open(@file_name, mode)

  raise Errno::ENOENT, "Failed to open #{@file_name}" if @hts_file.null?

  if fai
    r = LibHTS.hts_set_fai_filename(@hts_file, fai)
    raise "Failed to load fasta index: #{fai}" if r < 0
  end

  set_threads(threads) if threads

  return if @mode[0] == "w"

  @header = Bam::Header.new(@hts_file)
  create_index(index) if create_index
  @idx = load_index(index)
  @start_position = tell
  super # do nothing
end

Instance Attribute Details

#file_name ⇒ Object (readonly)

Returns the value of attribute file_name.



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# File 'lib/hts/bam.rb', line 16

def file_name
  @file_name
end

#header ⇒ Object (readonly)

Returns the value of attribute header.



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# File 'lib/hts/bam.rb', line 16

def header
  @header
end

#index_name ⇒ Object (readonly)

Returns the value of attribute index_name.



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# File 'lib/hts/bam.rb', line 16

def index_name
  @index_name
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/hts/bam.rb', line 16

def mode
  @mode
end

Class Method Details

.open(*args, **kw) ⇒ Object 



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# File 'lib/hts/bam.rb', line 18

def self.open(*args, **kw)
  file = new(*args, **kw) # do not yield
  return file unless block_given?

  begin
    yield file
  ensure
    file.close
  end
  file
end

Instance Method Details

#aux(tag) ⇒ Object 



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# File 'lib/hts/bam.rb', line 208

def aux(tag)
  warn "experimental"
  check_closed
  position = tell
  ary = map { |r| r.aux(tag) }
  seek(position)
  ary
end

#chrom ⇒ Array

Get chrom array

Returns:

  • (Array) —

    the chrom array



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# File 'lib/hts/bam.rb', line 195

define_getter :chrom

#cigar ⇒ Array

Get cigar array

Returns:

  • (Array) —

    the cigar array



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# File 'lib/hts/bam.rb', line 198

define_getter :cigar

#close ⇒ Object

Close the current file.



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# File 'lib/hts/bam.rb', line 90

def close
  LibHTS.hts_idx_destroy(@idx) if @idx&.null?
  @idx = nil
  super
end

#create_index(index_name = nil) ⇒ Object 



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# File 'lib/hts/bam.rb', line 62

def create_index(index_name = nil)
  check_closed

  warn "Create index for #{@file_name} to #{index_name}"
  if index
    LibHTS.sam_index_build2(@file_name, index_name, -1)
  else
    LibHTS.sam_index_build(@file_name, -1)
  end
end

#each(copy: false, &block) ⇒ Object 



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# File 'lib/hts/bam.rb', line 111

def each(copy: false, &block)
  if copy
    each_record_copy(&block)
  else
    each_record_reuse(&block)
  end
end

#each_aux(tag) ⇒ Object 



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# File 'lib/hts/bam.rb', line 235

def each_aux(tag)
  warn "experimental"
  check_closed
  return to_enum(__method__, tag) unless block_given?

  each do |record|
    yield record.aux(tag)
  end

  self
end

#each_chrom ⇒ Object

Get chrom iterator



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# File 'lib/hts/bam.rb', line 222

define_iterator :chrom

#each_cigar ⇒ Object

Get cigar iterator



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# File 'lib/hts/bam.rb', line 225

define_iterator :cigar

#each_flag ⇒ Object

Get flag iterator



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# File 'lib/hts/bam.rb', line 221

define_iterator :flag

#each_insert_size ⇒ Object Also known as: each_isize

Get insert_size iterator



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# File 'lib/hts/bam.rb', line 228

define_iterator :insert_size

#each_mapq ⇒ Object

Get mapq iterator



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# File 'lib/hts/bam.rb', line 224

define_iterator :mapq

#each_mate_chrom ⇒ Object

Get mate_chrom iterator



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# File 'lib/hts/bam.rb', line 226

define_iterator :mate_chrom

#each_mate_pos ⇒ Object Also known as: each_mpos

Get mate_pos iterator



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# File 'lib/hts/bam.rb', line 227

define_iterator :mate_pos

#each_pos ⇒ Object

Get pos iterator



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# File 'lib/hts/bam.rb', line 223

define_iterator :pos

#each_qname ⇒ Object

Get qname iterator



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# File 'lib/hts/bam.rb', line 220

define_iterator :qname

#each_qual ⇒ Object

Get qual iterator



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# File 'lib/hts/bam.rb', line 230

define_iterator :qual

#each_seq ⇒ Object

Get seq iterator



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# File 'lib/hts/bam.rb', line 229

define_iterator :seq

#flag ⇒ Array

Get flag array

Returns:

  • (Array) —

    the flag array



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# File 'lib/hts/bam.rb', line 194

define_getter :flag

#index_loaded? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hts/bam.rb', line 83

def index_loaded?
  check_closed

  !@idx.null?
end

#insert_size ⇒ Array Also known as: isize

Get insert_size array

Returns:

  • (Array) —

    the insert_size array



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# File 'lib/hts/bam.rb', line 201

define_getter :insert_size

#load_index(index_name = nil) ⇒ Object 



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# File 'lib/hts/bam.rb', line 73

def load_index(index_name = nil)
  check_closed

  if index_name
    LibHTS.sam_index_load2(@hts_file, @file_name, index_name)
  else
    LibHTS.sam_index_load3(@hts_file, @file_name, nil, 2) # should be 3 ? (copy remote file to local?)
  end
end

#mapq ⇒ Array

Get mapq array

Returns:

  • (Array) —

    the mapq array



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# File 'lib/hts/bam.rb', line 197

define_getter :mapq

#mate_chrom ⇒ Array

Get mate_chrom array

Returns:

  • (Array) —

    the mate_chrom array



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# File 'lib/hts/bam.rb', line 199

define_getter :mate_chrom

#mate_pos ⇒ Array Also known as: mpos

Get mate_pos array

Returns:

  • (Array) —

    the mate_pos array



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# File 'lib/hts/bam.rb', line 200

define_getter :mate_pos

#pos ⇒ Array

Get pos array

Returns:

  • (Array) —

    the pos array



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# File 'lib/hts/bam.rb', line 196

define_getter :pos

#qname ⇒ Array

Get qname array

Returns:

  • (Array) —

    the qname array



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# File 'lib/hts/bam.rb', line 193

define_getter :qname

#qual ⇒ Array

Get qual array

Returns:

  • (Array) —

    the qual array



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# File 'lib/hts/bam.rb', line 203

define_getter :qual

#query(region, copy: false, &block) ⇒ Object 



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# File 'lib/hts/bam.rb', line 142

def query(region, copy: false, &block)
  if copy
    query_copy(region, &block)
  else
    query_reuse(region, &block)
  end
end

#seq ⇒ Array

Get seq array

Returns:

  • (Array) —

    the seq array



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# File 'lib/hts/bam.rb', line 202

define_getter :seq

#write(aln) ⇒ Object 



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# File 'lib/hts/bam.rb', line 104

def write(aln)
  check_closed

  aln_dup = aln.dup
  LibHTS.sam_write1(@hts_file, header, aln_dup) > 0 || raise
end

#write_header(header) ⇒ Object 



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# File 'lib/hts/bam.rb', line 96

def write_header(header)
  check_closed

  @header = header.dup
  LibHTS.hts_set_fai_filename(@hts_file, @file_name)
  LibHTS.sam_hdr_write(@hts_file, header)
end