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package com.rockymadden.stringmetric.cli.similarity
import com.rockymadden.stringmetric.cli._
import com.rockymadden.stringmetric.similarity.WeightedLevenshteinMetric
import scala.math.BigDecimal
/**
* The weightedLevenshteinMetric [[com.rockymadden.stringmetric.cli.Command]]. Compares the number of characters that
* two strings are different from one another via insertion, deletion, and substitution. Allows the invoker to indicate
* the weight each operation takes.
*/
object weightedLevenshteinMetric extends Command {
override def main(args: Array[String]): Unit = {
val opts: OptionMap = args
try
if (opts.contains('h) || opts.contains('help)) {
help()
exit(opts)
} else if (opts.contains('dashless) && (opts('dashless): Array[String]).length == 2
&& opts.contains('deleteWeight) && (opts('deleteWeight): Double) >= 0
&& opts.contains('insertWeight) && (opts('insertWeight): Double) >= 0
&& opts.contains('substituteWeight) && (opts('substituteWeight): Double) >= 0) {
execute(opts)
exit(opts)
} else throw new IllegalArgumentException("Expected valid syntax. See --help.")
catch { case e: Throwable => error(e, opts) }
}
override def help(): Unit = {
val ls = sys.props("line.separator")
val tab = " "
println(
"Compares the number of characters that two strings are different from one another via insertion, deletion, " +
"and substitution. Allows the invoker to indicate the weight each operation takes." + ls + ls +
"Syntax:" + ls +
tab + "weightedLevenshteinMetric [Options] --deleteWeight=[double] --insertWeight=[double] --substituteWeight=[double] string1 string2..." + ls + ls +
"Options:" + ls +
tab + "--deleteWeight" + ls +
tab + tab + "The weight given to delete operations." +
tab + "-h, --help" + ls +
tab + tab + "Outputs description, syntax, and opts." +
tab + "--insertWeight" + ls +
tab + tab + "The weight given to insert operations." +
tab + "--substituteWeight" + ls +
tab + tab + "The weight given to substitute operations."
)
}
override def execute(opts: OptionMap): Unit = {
val strings: Array[String] = opts('dashless)
val weights = Tuple3[BigDecimal, BigDecimal, BigDecimal](
opts('deleteWeight),
opts('insertWeight),
opts('substituteWeight)
)
println(WeightedLevenshteinMetric.compare(strings(0), strings(1))(weights).getOrElse("not comparable"))
}
}
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