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author | mpociecha <michal.pociecha@gmail.com> | 2014-11-29 18:00:37 +0100 |
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committer | mpociecha <michal.pociecha@gmail.com> | 2014-11-30 22:31:31 +0100 |
commit | 3b585e901040e6a820e8533c5a818b7096b9625e (patch) | |
tree | 4dfe5b55d5d40268b84ee4fb4e5176c91b944a0a /src/compiler/scala | |
parent | af295c53a9c9bc3d579abd5678aba62210d23ada (diff) | |
download | scala-3b585e901040e6a820e8533c5a818b7096b9625e.tar.gz scala-3b585e901040e6a820e8533c5a818b7096b9625e.tar.bz2 scala-3b585e901040e6a820e8533c5a818b7096b9625e.zip |
Add flat classpath implementation for directories
There's added the flat classpath implementation for directories using
java.util.File directly. Since we work with a real directory - not
the AbstractFile - we don't need to iterate all entries of a file to
get inner entries of some package. We can just find an adequate
directory for a package.
There are added implementations for a class- and a sourcepath. Both
extend DirectoryFileLookup which provides common logic.
Diffstat (limited to 'src/compiler/scala')
4 files changed, 189 insertions, 1 deletions
diff --git a/src/compiler/scala/tools/nsc/classpath/DirectoryFlatClassPath.scala b/src/compiler/scala/tools/nsc/classpath/DirectoryFlatClassPath.scala new file mode 100644 index 0000000000..81d2f7320f --- /dev/null +++ b/src/compiler/scala/tools/nsc/classpath/DirectoryFlatClassPath.scala @@ -0,0 +1,162 @@ +/* + * Copyright (c) 2014 Contributor. All rights reserved. + */ +package scala.tools.nsc.classpath + +import java.io.File +import java.io.FileFilter +import java.net.URL +import scala.reflect.io.AbstractFile +import scala.reflect.io.PlainFile +import scala.tools.nsc.util.ClassRepresentation +import FileUtils._ + +/** + * A trait allowing to look for classpath entries of given type in directories. + * It provides common logic for classes handling class and source files. + * It makes use of the fact that in the case of nested directories it's easy to find a file + * when we have a name of a package. + */ +trait DirectoryFileLookup[FileEntryType <: ClassRepClassPathEntry] extends FlatClassPath { + val dir: File + assert(dir != null, "Directory file in DirectoryFileLookup cannot be null") + + override def asURLs: Seq[URL] = Seq(dir.toURI.toURL) + override def asClassPathStrings: Seq[String] = Seq(dir.getPath) + + import FlatClassPath.RootPackage + private def getDirectory(forPackage: String): Option[File] = { + if (forPackage == RootPackage) { + Some(dir) + } else { + val packageDirName = FileUtils.dirPath(forPackage) + val packageDir = new File(dir, packageDirName) + if (packageDir.exists && packageDir.isDirectory) { + Some(packageDir) + } else None + } + } + + override private[nsc] def packages(inPackage: String): Seq[PackageEntry] = { + val dirForPackage = getDirectory(inPackage) + val nestedDirs: Array[File] = dirForPackage match { + case None => Array.empty + case Some(directory) => directory.listFiles(DirectoryFileLookup.packageDirectoryFileFilter) + } + val prefix = PackageNameUtils.packagePrefix(inPackage) + val entries = nestedDirs map { file => + PackageEntryImpl(prefix + file.getName) + } + entries + } + + protected def files(inPackage: String): Seq[FileEntryType] = { + val dirForPackage = getDirectory(inPackage) + val files: Array[File] = dirForPackage match { + case None => Array.empty + case Some(directory) => directory.listFiles(fileFilter) + } + val entries = files map { file => + val wrappedFile = new scala.reflect.io.File(file) + createFileEntry(new PlainFile(wrappedFile)) + } + entries + } + + override private[nsc] def list(inPackage: String): FlatClassPathEntries = { + val dirForPackage = getDirectory(inPackage) + val files: Array[File] = dirForPackage match { + case None => Array.empty + case Some(directory) => directory.listFiles() + } + val packagePrefix = PackageNameUtils.packagePrefix(inPackage) + val packageBuf = collection.mutable.ArrayBuffer.empty[PackageEntry] + val fileBuf = collection.mutable.ArrayBuffer.empty[FileEntryType] + for (file <- files) { + if (file.isPackage) { + val pkgEntry = PackageEntryImpl(packagePrefix + file.getName) + packageBuf += pkgEntry + } else if (fileFilter.accept(file)) { + val wrappedFile = new scala.reflect.io.File(file) + val abstractFile = new PlainFile(wrappedFile) + fileBuf += createFileEntry(abstractFile) + } + } + FlatClassPathEntries(packageBuf, fileBuf) + } + + protected def createFileEntry(file: AbstractFile): FileEntryType + protected def fileFilter: FileFilter +} + +object DirectoryFileLookup { + + private[classpath] object packageDirectoryFileFilter extends FileFilter { + override def accept(pathname: File): Boolean = pathname.isPackage + } +} + +case class DirectoryFlatClassPath(dir: File) + extends DirectoryFileLookup[ClassFileEntryImpl] + with NoSourcePaths { + + override def findClass(className: String): Option[ClassRepresentation[AbstractFile]] = findClassFile(className) map ClassFileEntryImpl + + override def findClassFile(className: String): Option[AbstractFile] = { + val relativePath = FileUtils.dirPath(className) + val classFile = new File(s"$dir/$relativePath.class") + if (classFile.exists) { + val wrappedClassFile = new scala.reflect.io.File(classFile) + val abstractClassFile = new PlainFile(wrappedClassFile) + Some(abstractClassFile) + } else None + } + + override protected def createFileEntry(file: AbstractFile): ClassFileEntryImpl = ClassFileEntryImpl(file) + override protected def fileFilter: FileFilter = DirectoryFlatClassPath.classFileFilter + + override private[nsc] def classes(inPackage: String): Seq[ClassFileEntry] = files(inPackage) +} + +object DirectoryFlatClassPath { + + private val classFileFilter = new FileFilter { + override def accept(pathname: File): Boolean = pathname.isClass + } +} + +case class DirectoryFlatSourcePath(dir: File) + extends DirectoryFileLookup[SourceFileEntryImpl] + with NoClassPaths { + + override def asSourcePathString: String = asClassPathString + + override protected def createFileEntry(file: AbstractFile): SourceFileEntryImpl = SourceFileEntryImpl(file) + override protected def fileFilter: FileFilter = DirectoryFlatSourcePath.sourceFileFilter + + override def findClass(className: String): Option[ClassRepresentation[AbstractFile]] = { + findSourceFile(className) map SourceFileEntryImpl + } + + private def findSourceFile(className: String): Option[AbstractFile] = { + val relativePath = FileUtils.dirPath(className) + val sourceFile = Stream("scala", "java") + .map(ext => new File(s"$dir/$relativePath.$ext")) + .collectFirst { case file if file.exists() => file } + + sourceFile.map { file => + val wrappedSourceFile = new scala.reflect.io.File(file) + val abstractSourceFile = new PlainFile(wrappedSourceFile) + abstractSourceFile + } + } + + override private[nsc] def sources(inPackage: String): Seq[SourceFileEntry] = files(inPackage) +} + +object DirectoryFlatSourcePath { + + private val sourceFileFilter = new FileFilter { + override def accept(pathname: File): Boolean = endsScalaOrJava(pathname.getName) + } +} diff --git a/src/compiler/scala/tools/nsc/classpath/FileUtils.scala b/src/compiler/scala/tools/nsc/classpath/FileUtils.scala index 0221454c04..f8f5ac3ac5 100644 --- a/src/compiler/scala/tools/nsc/classpath/FileUtils.scala +++ b/src/compiler/scala/tools/nsc/classpath/FileUtils.scala @@ -3,12 +3,13 @@ */ 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 files used in the context of classpath + * 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 { @@ -20,12 +21,20 @@ object FileUtils { 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" @@ -43,4 +52,9 @@ object FileUtils { 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) != '.') } diff --git a/src/compiler/scala/tools/nsc/classpath/FlatClassPath.scala b/src/compiler/scala/tools/nsc/classpath/FlatClassPath.scala index bbd244b647..26b5429e23 100644 --- a/src/compiler/scala/tools/nsc/classpath/FlatClassPath.scala +++ b/src/compiler/scala/tools/nsc/classpath/FlatClassPath.scala @@ -89,3 +89,13 @@ private[nsc] case class ClassAndSourceFilesEntry(classFile: AbstractFile, srcFil } private[nsc] case class PackageEntryImpl(name: String) extends PackageEntry + +private[nsc] trait NoSourcePaths { + def asSourcePathString: String = "" + private[nsc] def sources(inPackage: String): Seq[SourceFileEntry] = Seq.empty +} + +private[nsc] trait NoClassPaths { + def findClassFile(className: String): Option[AbstractFile] = None + private[nsc] def classes(inPackage: String): Seq[ClassFileEntry] = Seq.empty +} diff --git a/src/compiler/scala/tools/nsc/classpath/PackageNameUtils.scala b/src/compiler/scala/tools/nsc/classpath/PackageNameUtils.scala index c93ce6ed27..c907d565d2 100644 --- a/src/compiler/scala/tools/nsc/classpath/PackageNameUtils.scala +++ b/src/compiler/scala/tools/nsc/classpath/PackageNameUtils.scala @@ -21,4 +21,6 @@ object PackageNameUtils { else (fullClassName.substring(0, lastDotIndex), fullClassName.substring(lastDotIndex + 1)) } + + def packagePrefix(inPackage: String): String = if (inPackage == RootPackage) "" else inPackage + "." } |