annotate search-mz @ 2:20d69a062da3 draft

planemo upload for repository https://github.com/workflow4metabolomics/lcmsmatching.git commit d4048accde6bdfd5b3e14f5394902d38991854f8

#!/usr/bin/env Rscript
# vi: ft=R
args <- commandArgs(trailingOnly = F)
script.path <- sub("--file=","",args[grep("--file=",args)])
library(getopt)
source(file.path(dirname(script.path), 'msdb-common.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'MsFileDb.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'MsPeakForestDb.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'MsXlsDb.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'Ms4TabSqlDb.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'MsDbLogger.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'MsDbInputDataFrameStream.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'MsDbOutputDataFrameStream.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'htmlhlp.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'strhlp.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'fshlp.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'biodb-common.R'), chdir = TRUE)
source(file.path(dirname(script.path), 'nethlp.R'), chdir = TRUE)

# Missing paste0() function in R 2.14.1
if (as.integer(R.Version()$major) == 2 && as.numeric(R.Version()$minor) < 15)
	paste0 <- function(...) paste(..., sep = '')

#############
# CONSTANTS #
#############

PROG <- sub('^.*/([^/]+)$', '\\1', commandArgs()[4], perl = TRUE)
USERAGENT <- 'search-mz ; [e-mail]'

# Authorized database types
MSDB.XLS <- 'xls'
MSDB.4TABSQL <- '4tabsql'
MSDB.FILE <- 'file'
MSDB.PEAKFOREST <- 'peakforest'
MSDB.VALS <- c(MSDB.XLS, MSDB.4TABSQL, MSDB.FILE, MSDB.PEAKFOREST)

# Authorized mode values
POS_MODE <- 'pos'
NEG_MODE <- 'neg'
MSDB.MODE.VALS <- c(POS_MODE, NEG_MODE)

# Default 
MSDB.DFT <- list()
MSDB.DFT[['mzshift']] <- 0 # in ppm
MSDB.DFT[['mzprec']] <- 5 # in ppm
MSDB.DFT[['mztolunit']] <- MSDB.DFT.MZTOLUNIT
MSDB.DFT[['precursor-rt-tol']] <- 5
MSDB.DFT[['molids-sep']] <- MSDB.DFT.MATCH.SEP
MSDB.DFT[['db-fields']] <- concat.kv.list(msdb.get.dft.db.fields())
MSDB.DFT[['db-ms-modes']] <- concat.kv.list(MSDB.DFT.MODES)
MSDB.DFT[['pos-prec']] <- paste(MSDB.DFT.PREC[[MSDB.TAG.POS]], collapse = ',')
MSDB.DFT[['neg-prec']] <- paste(MSDB.DFT.PREC[[MSDB.TAG.NEG]], collapse = ',')
DEFAULT.ARG.VALUES <- MSDB.DFT
DEFAULT.ARG.VALUES[['input-col-names']] <- concat.kv.list(msdb.get.dft.input.fields())
DEFAULT.ARG.VALUES[['output-col-names']] <- concat.kv.list(msdb.get.dft.output.fields())

##############
# PRINT HELP #
##############

print.help <- function(spec, status = 0) {
	cat(getopt(spec, usage = TRUE, command = PROG))
	q(status = status)
}

###############################
# SET DEFAULT ARGUMENT VALUES #
###############################

set.dft.arg.val <-function(opt) {

	for (f in names(MSDB.DFT))
		if (is.null(opt[[f]]))
			opt[[f]] <- MSDB.DFT[[f]]

	# Set default values
	if ( opt$database == MSDB.XLS && ! is.null(opt$url) && is.null(opt[['cache-dir']]))
		opt[['cache-dir']] <- file.path(opt$url, 'cache')

	if ( ! is.null(opt$rtcol) && opt$rtcol == '')
		opt$rtcol <- NULL

	return(opt)
}

#########################
# PARSE ARGUMENT VALUES #
#########################

parse.arg.val <- function(opt) {

	# Parse input column names
	if ( ! is.null(opt[['db-fields']])) {
		cust <- split.kv.list(opt[['db-fields']])
		opt[['db-fields']] <- split.kv.list(MSDB.DFT[['db-fields']])
		opt[['db-fields']][names(cust)] <- cust
	}

	# Parse MS modes
	if ( ! is.null(opt[['db-ms-modes']])) {
		cust <- split.kv.list(opt[['db-ms-modes']])
		opt[['db-ms-modes']] <- split.kv.list(MSDB.DFT[['db-ms-modes']])
		opt[['db-ms-modes']][names(cust)] <- cust
	}

	# Parse retention time columns
	if ( ! is.null(opt$rtcol))
		opt$rtcol <- strsplit(opt$rtcol, ',')[[1]]

	# Parse input column names
	if (is.null(opt[['input-col-names']])) {
		opt[['input-col-names']] <- msdb.get.dft.input.fields()
	}
	else {
		custcols <- split.kv.list(opt[['input-col-names']])
		dftcols <- msdb.get.dft.input.fields()
		opt[['input-col-names']] <- c(custcols, dftcols[ ! names(dftcols) %in% names(custcols)]) 
	}

	# Parse output column names
	if (is.null(opt[['output-col-names']])) {
		# By default keep input col names for output
		opt[['output-col-names']] <- msdb.get.dft.output.fields()
		input.cols <- names(opt[['input-col-names']])
		output.cols <- names(opt[['output-col-names']])
		opt[['output-col-names']] <- c(opt[['input-col-names']][input.cols %in% output.cols], opt[['output-col-names']][ ! output.cols %in% input.cols])
	}
	else {
		custcols <- split.kv.list(opt[['output-col-names']])
		dftcols <- msdb.get.dft.output.fields()
		opt[['output-col-names']] <- c(custcols, dftcols[ ! names(dftcols) %in% names(custcols)]) 
	}

	# Parse lists of precursors
	if ( ! is.null(opt[['pos-prec']]))
		opt[['pos-prec']] <- split.str(opt[['pos-prec']], unlist = TRUE)
	if ( ! is.null(opt[['neg-prec']]))
		opt[['neg-prec']] <- split.str(opt[['neg-prec']], unlist = TRUE)

	return(opt)
}

#################################
# PRINT DEFAULT ARGUMENT VALUES #
#################################

print.dft.arg.val <- function(opt) {

	print.flags <- DEFAULT.ARG.VALUES
	names(print.flags) <- vapply(names(print.flags), function(x) paste0('print-', x), FUN.VALUE = '')
	for (f in names(print.flags))
		if ( ! is.null(opt[[f]])) {
			cat(print.flags[[f]])
			q(status = 0)
		}
}

make.getopt.spec.print.dft <- function() {

	spec <- character()

	for (f in names(DEFAULT.ARG.VALUES))
		spec <- c(spec, paste0('print-', f), NA_character_, 0, 'logical', paste0('Print default value of --', f))

	return(spec)
}

##############################
# MAKE GETOPT SPECIFICATIONS #
##############################

make.getopt.spec <- function() {
	spec = c(
		'help',             'h',            0,  'logical',      'Print this help.',
		'mode',             'm',            1,  'character',    paste0('MS mode. Possible values are:', paste(MSDB.MODE.VALS, collapse = ", "), '.'),
		'mzshift',          's',            1,  'numeric',      paste0('Shift on m/z, in ppm. Default is ', MSDB.DFT$mzshift,'.'),
		'mzprec',           'p',            1,  'numeric',      paste0('Tolerance on m/z, in ppm. Default is ', MSDB.DFT$mzprec,'.'),
		'mztolunit',        NA_character_,  1,  'character',    paste0('Tolerance on m/z, in ppm. Default is ', MSDB.DFT$mztolunit,'.'),
		'rttol',            'r',            1,  'numeric',      paste0('Tolerance on retention times. Unset by default.'),
		'rttolx',           'x',            1,  'numeric',      paste0('Tolerance on retention times. Unset by default.'),
		'rttoly',           'y',            1,  'numeric',      paste0('Tolerance on retention times. Unset by default.'),
		'rtcol',            'c',            1,  'character',    paste0('Chromatographic column to use. Unset by default. If set, use the corresponding column to filter on retention times, if retention times are provided.'),
		'all-cols',         NA_character_,  0,  'logical',      'Use all available chromatographic columns to match retention times.',
		'check-cols',       NA_character_,  0,  'logical',      'Check that the chromatographic column names specified with option -c really exist.',
		'list-cols',        NA_character_,  0,  'logical',      'List all chromatographic columns present in the database. Write list inside the file specified by -o option.',
		'same-rows',        'a',            0,  'logical',      'If set, output exactly the same number of rows as the input. This means that in case of multiple matches for one mz, then only one line is output (i.e.: the mz value is not duplicated on several lines). In the main output file, an "ms.matching" column is output with inside, for each mz, a comma separated list of matched component/molecule IDs. If unset, then only the main output file is used, and one single is written to it with one line per peak match, and eventual mz line duplicated if there are multiple matches for this mz.',
		'same-cols',        'b',            0,  'logical',      'If set, output the same columns as inside the input. All input columns are copied to the output.',
		'input-file',       'i',            1,  'character',    'Set input file.',
		'output-file',      'o',            1,  'character',    'Set file to use for the main output.',
		'peak-output-file', NA_character_,  1,  'character',    'If set and if --same-rows is set, then output all matches inside the specified file, with one mz match per line. The output columns are: mz, rt, id, col, colrt, composition, attribution. This means that if an mz value is matched several times, then it will repeated on several lines, with one match description per line.',
		'html-output-file', NA_character_,  1,  'character',    'Set file to use for the HTML output.',
		'no-main-table-in-html-output',  NA_character_,  0,  'logical',      'Do not display main table in HTML output.',
		'precursor-match',  NA_character_,  0,  'logical',      'Remove peaks whose molecule precursor peak has not been matched. Unset by default.',
		'precursor-rt-tol', NA_character_,  1,  'numeric',      paste0('Precursor retention time tolerance. Only used when precursor-match is enabled. Default is ', MSDB.DFT[['precursor-rt-tol']], '.'),
		'pos-prec',         NA_character_,  1,  'character',    paste0('Set the list of precursors to use in positive mode. Default is "', MSDB.DFT[['pos-prec']], '".'),
		'neg-prec',         NA_character_,  1,  'character',    paste0('Set the list of precursors to use in negative mode. Default is "', MSDB.DFT[['neg-prec']], '".'),
		'input-col-names',  NA_character_,  1,  'character',    paste0('Set the input column names. Default is "', DEFAULT.ARG.VALUES[['input-col-names']], '".'),
		'output-col-names', NA_character_,  1,  'character',    paste0('Set the output column names. Default is "', DEFAULT.ARG.VALUES[['output-col-names']], '".'),
		'molids-sep',       NA_character_,  1,  'character',    paste0('Set character separator used to when concatenating molecule IDs in output. Default is "', MSDB.DFT[['molids-sep']] , '".'),
		'first-val',        NA_character_,  0,  'logical',      'Keep only the first value in multi-value fields. Unset by default.',
		'excel2011comp',            NA_character_,  0,  'logical',      'Excel 2011 compatiblity mode. Output ASCII text files instead of UTF-8 files, where greek letters are replaced with their latin names, plusminus sign is replaced with +- and apostrophe is replaced with \"prime\". All other non-ASCII characters are repladed with underscore.',
		'database',         'd',            1,  'character',    paste0('Set database to use: "xls" for an Excel database, "file" for a single file database, "4tabsql" for a 4Tab SQL database, and "peakforest" for a connection to PeakForest database.'),
		'url',              NA_character_,  1,  'character',    'URL of database. For "peakforest" database it is the HTTP URL, for the "xls" database it is the path to the directory containing the Excel files, for the "file" database it is the path to the file database and for the "4tabsql" database it is the IP address of the server.',
		'cache-dir',        NA_character_,  1,  'character',    'Path to directory where to store cache files. Only used when database flag is set to "xls".',
		'db-name',          NA_character_,  1,  'character',    'Name of the database. Used by the "4tabsql" database.',
		'db-user',          NA_character_,  1,  'character',    'User of the database. Used by the "4tabsql" database.',
		'db-password',      NA_character_,  1,  'character',    'Password of the database user. Used by the "4tabsql" database.',
		'db-fields',        NA_character_,  1,  'character',    paste0('Comma separated key/value list giving the field names to be used in the single file database (option --db-file). Default is "', MSDB.DFT[['db-fields']], '".'),
		'db-ms-modes',      NA_character_,  1,  'character',    paste0('Comma separated key/value list giving the MS modes to be used in the single file database (option --db-file). Default is "', MSDB.DFT[['db-ms-modes']], '".'),
		'db-token',         NA_character_,  1,  'character',    'Database token. Used by Peakforest database.',
		'debug',            NA_character_,  0,  'logical',      'Set debug mode.'
		)

	spec <- c(spec, make.getopt.spec.print.dft())	

	if ( ! is.null(spec))
		spec <- matrix(spec, byrow = TRUE, ncol = 5)

	return(spec)
}

#############
# READ ARGS #
#############

read_args <- function() {

	# options
	spec <- make.getopt.spec()
	opt <- getopt(spec)

	# help
	if ( ! is.null(opt$help))
		print.help(spec)

	print.dft.arg.val(opt) # Print default values
	opt <- set.dft.arg.val(opt) # Set default values
	opt <- parse.arg.val(opt) # Parse list values

	# Check values
	error <- .check.db.conn.opts(opt)
	if (is.null(opt[['output-file']]) && is.null(opt[['list-cols']])) {
		warning("You must set a path for the output file.")
		error <- TRUE
	}
	if (is.null(opt[['list-cols']])) {
		if (is.null(opt[['input-file']])) {
			warning("You must provide an input file.")
			error <- TRUE
		}
		if (is.null(opt$mode) || ( ! opt$mode %in% MSDB.MODE.VALS)) {
			warning("You must specify a mode through the --mode option.")
			error <- TRUE
		}
		if (is.null(opt$mzprec)) {
			warning("You must set a precision in MZ with the --mzprec option.")
			error <- TRUE
		}
		if ( ( ! is.null(opt$rtcol) || ! is.null(opt[['all-cols']])) && (is.null(opt$rttolx) || is.null(opt$rttoly))) {
			warning("When chromatographic columns are set, you must provide values for --rttolx and -rttoly.")
			error <- TRUE
		}
		if (is.null(opt$mztolunit) || ( ! opt$mztolunit %in% MSDB.MZTOLUNIT.VALS)) {
			warning("You must specify an M/Z tolerance unit through the --mztolunit option.")
			error <- TRUE
		}
	}

	# help
	if (error)
		print.help(spec, status = 1)

	return(opt)
}
	
	#####################################
	# CHECK DATABASE CONNECTION OPTIONS #
	#####################################
	
	.check.db.conn.opts <- function(opt) {

		# Print default values
		if ( ! is.null(opt[['print-db-fields']])) {
			cat(MSDB.DFT[['db-fields']])
			q(status = 0)
		}
		if ( ! is.null(opt[['print-db-ms-modes']])) {
			cat(MSDB.DFT[['db-ms-modes']])
			q(status = 0)
		}
	
		# Check values
		error <- FALSE
		if (is.null(opt$database)) {
			warning("You must provide a database type through --database option.")
			error <- TRUE
		}
		if ( ! opt$database %in% MSDB.VALS) {
			warning(paste0("Invalid value \"", opt$database, "\" for --database option."))
			error <- TRUE
		}
		if (opt$database == MSDB.FILE) {
			if (is.null(opt$url)) {
			warning("When using single file database, you must specify the location of the database file with option --url.")
			error <- TRUE
			}
			if ( ! file.exists(opt$url)) {
				warning(paste0("The file path \"", opt$url,"\" specified with --db-file option is not valid."))
				error <- TRUE
			}
		}
		if (opt$database == MSDB.XLS) {
			if (is.null(opt$url)) {
				warning("When using Excel database, you must specify the location of the Excel files directory with option --url.")
				error <- TRUE
			}
			if ( ! file.exists(opt$url)) {
				warning(paste0("The directory path \"", opt$url,"\" specified with --xls-dir option is not valid."))
				error <- TRUE
			}
		}
		if (opt$database == MSDB.4TABSQL) {
			if (is.null(opt$url)) {
				warning("When using 4Tab SQL database, you must specify the URL of the SQL server with option --url.")
				error <- TRUE
			}
			if (is.null(opt[['db-name']])) {
				warning("When using 4Tab SQL database, you must specify the database name through the --db-name option.")
				error <- TRUE
			}
			if (is.null(opt[['db-user']])) {
				warning("When using 4Tab SQL database, you must specify the database user through the --db-user option.")
				error <- TRUE
			}
			if (is.null(opt[['db-password']])) {
				warning("When using 4Tab SQL database, you must specify the database user password through the --db-password option.")
				error <- TRUE
			}
		}
		if (opt$database == MSDB.PEAKFOREST) {
			if (is.null(opt$url)) {
				warning("When using PeakForest database, you must specify the URL of the PeakForest server with option --url.")
				error <- TRUE
			}
		}
	
		return(error)
	}
	
	#############################
	# DISPLAY COMMAND LINE HELP #
	#############################
	
	.disp.cmd.line.help <- function(optspec, opt, prog, error = FALSE) {
	
		if ( ! is.null(opt$help) || error ) {
			cat(getopt(optspec, usage = TRUE, command = prog))
			q(status = 1)
		}
	}
	
	#################
	# LOAD DATABASE #
	#################
	
	.load.db <- function(opt) {

		if (is.null(opt[['pos-prec']]) && is.null(opt[['neg-prec']])) {
			precursors <- NULL
		} else {
			precursors <- list()
			precursors[[MSDB.TAG.POS]] <- opt[['pos-prec']]
			precursors[[MSDB.TAG.NEG]] <- opt[['neg-prec']]
		}

		db <- switch(opt$database,
		             peakforest = MsPeakForestDb$new(url = opt$url, useragent = USERAGENT, token = opt[['db-token']]),
		             xls = MsXlsDb$new(db_dir = opt$url, cache_dir = opt[['cache-dir']]),
		             '4tabsql' = Ms4TabSqlDb$new(host = extract.address(opt$url), port = extract.port(opt$url), dbname = opt[['db-name']], user = opt[['db-user']], password = opt[['db-password']]),
		             file = MsFileDb$new(file = opt$url),
		             NULL)
		db$setPrecursors(precursors)
		if (db$areDbFieldsSettable())
			db$setDbFields(opt[['db-fields']])
		if (db$areDbMsModesSettable())
			db$setDbMsModes(opt[['db-ms-modes']])
		db$addObservers(MsDbLogger$new())

		return(db)
	}

###############
# OUTPUT HTML #
###############

output.html <- function(db, main, peaks, file, opt, output.fields) {

	# Replace public database IDs by URLs
	if ( ! is.null(peaks) || ! is.null(main)) {
		# Conversion from extdb id field to extdb name
		extdb2classdb = list()
		extdb2classdb[MSDB.TAG.KEGG] = BIODB.KEGG
		extdb2classdb[MSDB.TAG.HMDB] = BIODB.HMDB
		extdb2classdb[MSDB.TAG.CHEBI] = BIODB.CHEBI
		extdb2classdb[MSDB.TAG.PUBCHEM] = BIODB.PUBCHEMCOMP

		# Loop on all dbs
		for (extdb in c(MSDB.TAG.KEGG, MSDB.TAG.HMDB, MSDB.TAG.CHEBI, MSDB.TAG.PUBCHEM)) {
			field <- output.fields[[extdb]]
			if ( ! is.null(peaks) && field %in% colnames(peaks))
				peaks[[field]] <- vapply(peaks[[field]], function(id) if (is.na(id)) '' else paste0('<a href="', get.entry.url(class = extdb2classdb[[extdb]], accession = id, content.type = BIODB.HTML), '">', id, '</a>'), FUN.VALUE = '')
			if ( ! is.null(main) && field %in% colnames(main))
				main[[field]] <- vapply(main[[field]], function(ids) if (is.na(ids) || nchar(ids) == 0) '' else paste(vapply(strsplit(ids, opt[['molids-sep']])[[1]], function(id) paste0('<a href="', get.entry.url(class = extdb2classdb[[extdb]], accession = id, content.type = BIODB.HTML), '">', id, '</a>'), FUN.VALUE = ''), collapse = opt[['molids-sep']]), FUN.VALUE = '')
		}
	}

	# Write HTML
	html <- HtmlWriter(file = file)
	html$writeBegTag('html')
	html$writeBegTag('header')
	html$writeTag('meta', attr = c(charset = "UTF-8"))
	html$writeTag('title', text = "LC/MS matching results")
	html$writeBegTag('style')
	html$write('table, th, td { border-collapse: collapse; }')
	html$write('table, th { border: 1px solid black; }')
	html$write('td { border-left: 1px solid black; border-right: 1px solid black; }')
	html$write('th, td { padding: 5px; }')
	html$write('th { background-color: LightBlue; }')
	html$write('tr:nth-child(even) { background-color: LemonChiffon; }')
	html$write('tr:nth-child(odd) { background-color: LightGreen; }')
	html$writeEndTag('style')
	html$writeEndTag('header')
	html$writeBegTag('body')
	html$writeTag('h1', text = "LC/MS matching")

	# Write parameters
	html$writeTag('h2', text = "Parameters")
	html$writeBegTag('ul')
	html$writeTag('li', text = paste0("Mode = ", opt$mode, "."))
	html$writeTag('li', text = paste0("M/Z precision = ", opt$mzprec, "."))
	html$writeTag('li', text = paste0("M/Z shift = ", opt$mzshift, "."))
	html$writeTag('li', text = paste0("Precursor match = ", (if (is.null(opt[['precursor-match']])) "no" else "yes"), "."))
	if ( ! is.null(opt[['precursor-match']])) {
		html$writeTag('li', text = paste0("Positive precursors = ", paste0(opt[['pos-prec']], collapse = ', '), "."))
		html$writeTag('li', text = paste0("Negative precursors = ", paste0(opt[['neg-prec']], collapse = ', '), "."))
	}
	if ( ! is.null(opt$rtcol)) {
		html$writeTag('li', text = paste0("Columns = ", paste(opt$rtcol, collapse = ", "), "."))
		html$writeTag('li', text = paste0("RTX = ", opt$rttolx, "."))
		html$writeTag('li', text = paste0("RTY = ", opt$rttoly, "."))
		if ( ! is.null(opt[['precursor-match']]))
			html$writeTag('li', text = paste0("RTZ = ", opt[['precursor-rt-tol']], "."))
	}
	html$writeEndTag('ul')

	# Write results
	html$writeTag('h2', text = "Results")
	results <- FALSE
	if ( ! is.null(main) && nrow(main) > 0 && is.null(opt[['no-main-table-in-html-output']])) {
		html$writeTag('h3', text = "Main output")
		html$writeTable(main)
		results <- TRUE
	}
	if ( ! is.null(peaks) && nrow(peaks) > 0) {
		html$writeTag('h3', text = "Matched peaks")
		html$writeTable(peaks)
		results <- TRUE
	}
	if ( ! results)
		html$writeTag('p', 'None.')

	html$writeEndTag('body')
	html$writeEndTag('html')
}

########
# MAIN #
########

options(error = function() { traceback(2) ; quit(status = 1) }, warn = 2 )

# Read command line arguments
opt <- read_args()

if (is.null(opt$debug)) {
	options(error = function() { quit(status = 1) }, warn = 0 )
}

# Load database
db <- .load.db(opt)

# Print columns
if ( ! is.null(opt[['list-cols']])) {
	cols <- db$getChromCol()
	df.write.tsv(cols, file = if (is.null(opt[['output-file']])) stdout() else opt[['output-file']])
	q(status = 0)
}

# Read input
if ( ! is.null(opt[['input-file']]) && ! file.exists(opt[['input-file']]))
	stop(paste0("Input file \"", opt[['input-file']], "\" does not exist."))
if (file.info(opt[['input-file']])$size > 0) {

	# Load file into data frame
	input <- read.table(file = opt[['input-file']], header = TRUE, sep = "\t", stringsAsFactor = FALSE)

	# Convert each column that is identified by a number into a name
	for (field in names(opt[['input-col-names']])) {
		if ( ! opt[['input-col-names']][[field]] %in% colnames(input) && length(grep('^[0-9]+$', opt[['input-col-names']][[field]])) > 0) {
			col.index <- as.integer(opt[['input-col-names']][[field]])
			if (col.index < 1 || col.index > length(colnames(input)))
				stop(paste0("No column n°", col.index, " for input field ", field, "."))
			opt[['input-col-names']][[field]] <- colnames(input)[[col.index]]
		}
	}
} else {
	input <- data.frame()
	input[[opt[['input-col-names']][['mz']]]] <- double()
	input[[opt[['input-col-names']][['rt']]]] <- double()
}

# Check mz column
if ( ! opt[['input-col-names']][['mz']] %in% colnames(input))
	stop(paste0('No column named "', opt[['input-col-names']][['mz']], '" in input file.'))

# Set columns 'all-cols' specified
if ( ! is.null(opt[['all-cols']]))
	opt$rtcol <- db$getChromCol()

# Check chrom columns
if ( ! is.null(opt[['check-cols']]) && ! is.null(opt$rtcol)) {
	dbcols <- db$getChromCol()[['id']]
	unknown.cols <- opt$rtcol[ ! opt$rtcol %in% dbcols]
	if (length(unknown.cols) > 0) {
		stop(paste0("Unknown chromatographic column", (if (length(unknown.cols) > 1) 's' else ''), ': ', paste(unknown.cols, collapse = ', '), ".\nAllowed chromatographic column names are:\n", paste(dbcols, collapse = "\n")))
	}
}

# Check that an RT column exists when using MZ/RT matching
if ( ! is.null(opt$rtcol) && ! opt[['input-col-names']][['rt']] %in% colnames(input))
	stop(paste0("You are running an MZ/RT match run on your input data, but no retention time column named '", opt[['input-col-names']][['rt']],"' can be found inside your input file."))

# Set streams
input.stream <- MsDbInputDataFrameStream$new(df = input, input.fields = opt[['input-col-names']])
main.output <- MsDbOutputDataFrameStream$new(keep.unused = ! is.null(opt[['same-cols']]), output.fields = opt[['output-col-names']], one.line = ! is.null(opt[['same-rows']]), match.sep = opt[['molids-sep']], first.val = ! is.null(opt[['first-val']]), ascii = ! is.null(opt[['excel2011comp']]), nogreek = ! is.null(opt[['excel2011comp']]), noapostrophe = ! is.null(opt[['excel2011comp']]), noplusminus = ! is.null(opt[['excel2011comp']]))
peaks.output <- MsDbOutputDataFrameStream$new(keep.unused = ! is.null(opt[['same-cols']]), output.fields = opt[['output-col-names']], first.val = ! is.null(opt[['first-val']]), ascii = ! is.null(opt[['excel2011comp']]), nogreek = ! is.null(opt[['excel2011comp']]), noapostrophe = ! is.null(opt[['excel2011comp']]), noplusminus = ! is.null(opt[['excel2011comp']]))
invisible(db$setInputStream(input.stream))
db$addOutputStreams(c(main.output, peaks.output))

# Set M/Z tolerance unit
db$setMzTolUnit(opt$mztolunit)

# Search database
mode <- if (opt$mode == POS_MODE) MSDB.TAG.POS else MSDB.TAG.NEG
db$searchForMzRtList(mode = mode, shift = opt$mzshift, prec = opt$mzprec, rt.tol = opt$rttol, rt.tol.x = opt$rttolx, rt.tol.y = opt$rttoly, col = opt$rtcol, precursor.match = ! is.null(opt[['precursor-match']]), precursor.rt.tol = opt[['precursor-rt-tol']])

# Write output
main.output$moveColumnsToBeginning(colnames(input))
peaks.output$moveColumnsToBeginning(colnames(input))
# TODO Create a class MsDbOutputCsvFileStream
df.write.tsv(main.output$getDataFrame(), file = opt[['output-file']], row.names = FALSE)
if ( ! is.null(opt[['peak-output-file']]))
	# TODO Create a class MsDbOutputCsvFileStream
	df.write.tsv(peaks.output$getDataFrame(), file = opt[['peak-output-file']], row.names = FALSE)
if ( ! is.null(opt[['html-output-file']]))
	# TODO Create a class MsDbOutputHtmlFileStream
	output.html(db = db, main = main.output$getDataFrame(), peaks = peaks.output$getDataFrame(), file = opt[['html-output-file']], opt = opt, output.fields = opt[['output-col-names']])