Kotlin Regex Extensions

Main.kt

/**
 *
 * Copyright 2017 FRANCESCO SAVERIO CANNIZZARO
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

fun main(args: Array<String>) {

    val regex = "[a-z]*\\[([0-9]+)\\]@(.*)"
    val value = "id[850]@text"

    value.groups(regex) {
        println("id=${it[0]}")
        println("content=${it[1]}")
    }

    value.matches(regex) {
       println("regex matches")
    }

    value.notMatches(regex) {
        println("regex not matches")
    }

}

RegexExtensions.kt

/**
 *
 * Copyright 2017 FRANCESCO SAVERIO CANNIZZARO
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

fun String.matches(regex: Regex, runner: String.() -> Unit) {
    if (matches(regex)) {
        runner.invoke(this)
    }
}

fun String.notMatches(regex: Regex, runner: String.() -> Unit) {
    if (!matches(regex)) {
        runner.invoke(this)
    }
}

fun String.groups(regex: String, runner: (groups: Array<String>) -> Unit) {
    val matcher = regex.toPattern().matcher(this)
    if (matcher.matches()) {
        val size = matcher.groupCount()
        var array = emptyArray<String>()
        for (i in 1..size) array += matcher.group(i)
        runner.invoke(array)
    }
}

fun String.matches(regex: String, runner: String.() -> Unit) = matches(regex.toRegex(), runner)

fun String.notMatches(regex: String, runner: String.() -> Unit) = notMatches(regex.toRegex(), runner)