org.wartremover.warts.PlatformDefault.scala Maven / Gradle / Ivy
package org.wartremover
package warts
object PlatformDefault extends WartTraverser {
private[wartremover] def getByte: String =
"please specify charset parameter. don't use platform's default charset https://docs.oracle.com/javase/8/docs/api/java/lang/String.html#getBytes--"
private[wartremover] def upperLowerCase: String =
"please specify locale parameter. don't use platform's default locale https://docs.oracle.com/javase/8/docs/api/java/lang/String.html"
private[wartremover] def newString: String =
"please specify charset parameter. don't use platform's default charset https://docs.oracle.com/javase/8/docs/api/java/lang/String.html#String-byte:A-"
private[wartremover] def fallbackSystemCodec: String =
"don't use scala.io.Codec.fallbackSystemCodec. don't use platform's default charset"
def apply(u: WartUniverse): u.Traverser = {
new u.Traverser(this) {
import q.reflect.*
override def traverseTree(tree: Tree)(owner: Symbol): Unit = {
tree match {
case t if hasWartAnnotation(t) =>
case t if t.isExpr =>
t.asExpr match {
case '{ ($x: String).getBytes } =>
error(tree.pos, getByte)
case '{ ($_ : String).toLowerCase } | '{ ($_ : String).toUpperCase } =>
error(tree.pos, upperLowerCase)
case '{ new String($x: Array[Byte]) } =>
error(tree.pos, newString)
case '{ scala.io.Codec.fallbackSystemCodec } =>
error(tree.pos, fallbackSystemCodec)
case _ =>
t match {
case Apply(
Select(New(tpe: TypeTree), ""),
arg1 :: Nil
) if tpe.tpe =:= TypeRepr.of[String] && arg1.tpe =:= TypeRepr.of[Array[Byte]] =>
error(tree.pos, newString)
case _ =>
super.traverseTree(tree)(owner)
}
}
case _ =>
super.traverseTree(tree)(owner)
}
}
}
}
}