raw.compiler.base.Counter.scala Maven / Gradle / Ivy
/*
* Copyright 2023 RAW Labs S.A.
*
* Use of this software is governed by the Business Source License
* included in the file licenses/BSL.txt.
*
* As of the Change Date specified in that file, in accordance with
* the Business Source License, use of this software will be governed
* by the Apache License, Version 2.0, included in the file
* licenses/APL.txt.
*/
package raw.compiler.base
import scala.collection.mutable
object Counter {
private val counterByIdn = mutable.HashMap[String, Int]()
private val lock = new Object
/** Return the next unique identifier. */
def next(prefix: String = "", suffix: String = ""): String = {
lock.synchronized {
if (!counterByIdn.contains(prefix)) {
counterByIdn.put(prefix, 0)
}
val n = counterByIdn(prefix)
counterByIdn.put(prefix, n + 1)
if (suffix.isEmpty) {
s"${prefix}_$$$n"
} else {
s"${prefix}_$$$n$$$suffix"
}
}
}
}