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 = {
import u.universe._
val FallbackSystemCodec = TermName("fallbackSystemCodec")
val GetBytes = TermName("getBytes")
val ToLowerCase = TermName("toLowerCase")
val ToUpperCase = TermName("toUpperCase")
new Traverser {
override def traverse(tree: Tree): Unit = {
tree match {
case t if hasWartAnnotation(u)(t) =>
// Ignore trees marked by SuppressWarnings
case Apply(Select(obj, GetBytes), Nil) if obj.tpe <:< typeOf[String] =>
error(u)(tree.pos, getByte)
case Apply(Select(obj, ToLowerCase | ToUpperCase), Nil) if obj.tpe <:< typeOf[String] =>
error(u)(tree.pos, upperLowerCase)
case Apply(Select(New(clazz), termNames.CONSTRUCTOR), List(arg))
if clazz.tpe =:= typeOf[String] && arg.tpe =:= typeOf[Array[Byte]] =>
error(u)(tree.pos, newString)
case Select(obj, FallbackSystemCodec) if obj.tpe =:= typeOf[scala.io.Codec.type] =>
// `fallbackSystemCodec` depends on `java.nio.charset.Charset.defaultCharset`
// https://github.com/scala/scala/blob/v2.13.6/src/library/scala/io/Codec.scala#L80
error(u)(tree.pos, fallbackSystemCodec)
case _ =>
super.traverse(tree)
}
}
}
}
}