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/* NSC -- new Scala compiler
* Copyright 2005-2009 LAMP/EPFL
*/
// $Id$
package scala.tools.nsc.io
import scala.collection.{mutable=>mut}
/**
* An in-memory directory.
*
* @author Lex Spoon
*/
class VirtualDirectory(val name: String, maybeContainer: Option[VirtualDirectory])
extends AbstractFile {
def path: String =
maybeContainer match {
case None => name
case Some(parent) => parent.path+'/'+ name
}
def container = maybeContainer.get
def isDirectory = true
var lastModified: Long = System.currentTimeMillis
private def updateLastModified {
lastModified = System.currentTimeMillis
}
override def file = null
override def input = error("directories cannot be read")
override def output = error("directories cannot be written")
private val files = mut.Map.empty[String, AbstractFile]
// the toList is so that the directory may continue to be
// modified while its elements are iterated
def iterator = files.values.toList.iterator
override def lookupName(name: String, directory: Boolean): AbstractFile = {
files.get(name) match {
case None => null
case Some(file) =>
if (file.isDirectory == directory)
file
else
null
}
}
override def fileNamed(name: String): AbstractFile = {
val existing = lookupName(name, false)
if (existing == null) {
val newFile = new VirtualFile(name, path+'/'+name)
files(name) = newFile
newFile
} else {
existing
}
}
override def subdirectoryNamed(name: String): AbstractFile = {
val existing = lookupName(name, true)
if (existing == null) {
val dir = new VirtualDirectory(name, Some(this))
files(name) = dir
dir
} else {
existing
}
}
def clear() {
files.clear();
}
}
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