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/*
* Copyright (c) 2014 Contributor. All rights reserved.
*/
package dotty.tools.dotc.classpath
import java.io.{File => JFile, FileFilter}
import java.net.URL
import scala.reflect.internal.FatalError
import scala.reflect.io.AbstractFile
/**
* Common methods related to Java files and abstract files used in the context of classpath
*/
object FileUtils {
implicit class AbstractFileOps(val file: AbstractFile) extends AnyVal {
def isPackage: Boolean = file.isDirectory && mayBeValidPackage(file.name)
def isClass: Boolean = !file.isDirectory && file.hasExtension("class") && !file.name.endsWith("$class.class")
// FIXME: drop last condition when we stop being compatible with Scala 2.11
def isScalaOrJavaSource: Boolean = !file.isDirectory && (file.hasExtension("scala") || file.hasExtension("java"))
// TODO do we need to check also other files using ZipMagicNumber like in scala.tools.nsc.io.Jar.isJarOrZip?
def isJarOrZip: Boolean = file.hasExtension("jar") || file.hasExtension("zip")
/**
* Safe method returning a sequence containing one URL representing this file, when underlying file exists,
* and returning given default value in other case
*/
def toURLs(default: => Seq[URL] = Seq.empty): Seq[URL] = if (file.file == null) default else Seq(file.toURL)
}
implicit class FileOps(val file: JFile) extends AnyVal {
def isPackage: Boolean = file.isDirectory && mayBeValidPackage(file.getName)
def isClass: Boolean = file.isFile && file.getName.endsWith(".class") && !file.getName.endsWith("$class.class")
// FIXME: drop last condition when we stop being compatible with Scala 2.11
}
def stripSourceExtension(fileName: String): String = {
if (endsScala(fileName)) stripClassExtension(fileName)
else if (endsJava(fileName)) stripJavaExtension(fileName)
else throw new FatalError("Unexpected source file ending: " + fileName)
}
def dirPath(forPackage: String) = forPackage.replace('.', '/')
def endsClass(fileName: String): Boolean =
fileName.length > 6 && fileName.substring(fileName.length - 6) == ".class"
def endsScalaOrJava(fileName: String): Boolean =
endsScala(fileName) || endsJava(fileName)
def endsJava(fileName: String): Boolean =
fileName.length > 5 && fileName.substring(fileName.length - 5) == ".java"
def endsScala(fileName: String): Boolean =
fileName.length > 6 && fileName.substring(fileName.length - 6) == ".scala"
def stripClassExtension(fileName: String): String =
fileName.substring(0, fileName.length - 6) // equivalent of fileName.length - ".class".length
def stripJavaExtension(fileName: String): String =
fileName.substring(0, fileName.length - 5)
// probably it should match a pattern like [a-z_]{1}[a-z0-9_]* but it cannot be changed
// because then some tests in partest don't pass
def mayBeValidPackage(dirName: String): Boolean =
(dirName != "META-INF") && (dirName != "") && (dirName.charAt(0) != '.')
def mkFileFilter(f: JFile => Boolean) = new FileFilter {
def accept(pathname: JFile): Boolean = f(pathname)
}
}
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