diff options
Diffstat (limited to 'src/compiler/scala/tools/nsc/classpath/FileUtils.scala')
-rw-r--r-- | src/compiler/scala/tools/nsc/classpath/FileUtils.scala | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/classpath/FileUtils.scala b/src/compiler/scala/tools/nsc/classpath/FileUtils.scala new file mode 100644 index 0000000000..ee2528e15c --- /dev/null +++ b/src/compiler/scala/tools/nsc/classpath/FileUtils.scala @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2014 Contributor. All rights reserved. + */ +package scala.tools.nsc.classpath + +import java.io.{ File => JFile } +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") + + 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") + } + + 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 + private def mayBeValidPackage(dirName: String): Boolean = + (dirName != "META-INF") && (dirName != "") && (dirName.charAt(0) != '.') +} |