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/*
* Copyright (c) 2014 Contributor. All rights reserved.
*/
package scala.tools.nsc.util
import scala.tools.nsc.Settings
import scala.tools.nsc.classpath.{AggregateFlatClassPath, FlatClassPath, FlatClassPathFactory}
import scala.tools.nsc.io.AbstractFile
import java.net.URL
/**
* Simple interface that allows us to abstract over how class file lookup is performed
* in different classpath representations.
*/
// TODO at the end, after the possible removal of the old classpath representation, this class shouldn't be generic
// T should be just changed to AbstractFile
trait ClassFileLookup[T] {
def findClassFile(name: String): Option[AbstractFile]
/**
* It returns both classes from class file and source files (as our base ClassRepresentation).
* So note that it's not so strictly related to findClassFile.
*/
def findClass(name: String): Option[ClassRepresentation[T]]
/**
* A sequence of URLs representing this classpath.
*/
def asURLs: Seq[URL]
/** The whole classpath in the form of one String.
*/
def asClassPathString: String
// for compatibility purposes
@deprecated("Use asClassPathString instead of this one", "2.11.5")
def asClasspathString: String = asClassPathString
/** The whole sourcepath in the form of one String.
*/
def asSourcePathString: String
}
object ClassFileLookup {
def createForFile(f: AbstractFile, current: ClassFileLookup[AbstractFile], settings: Settings): ClassFileLookup[AbstractFile] = current match {
case cp: ClassPath[_] => cp.context.newClassPath(f)
case _: FlatClassPath => FlatClassPathFactory.newClassPath(f, settings)
}
def createAggregate(elems: Iterable[ClassFileLookup[AbstractFile]], current: ClassFileLookup[AbstractFile]): ClassFileLookup[AbstractFile] = {
assert(elems.nonEmpty)
if (elems.size == 1) elems.head
else current match {
case cp: ClassPath[_] =>
new MergedClassPath(elems.asInstanceOf[Iterable[ClassPath[AbstractFile]]], cp.context)
case _: FlatClassPath =>
AggregateFlatClassPath.createAggregate(elems.asInstanceOf[Iterable[FlatClassPath]].toSeq : _*)
}
}
}
/**
* Represents classes which can be loaded with a ClassfileLoader and/or SourcefileLoader.
*/
// TODO at the end, after the possible removal of the old classpath implementation, this class shouldn't be generic
// T should be just changed to AbstractFile
trait ClassRepresentation[T] {
def binary: Option[T]
def source: Option[AbstractFile]
def name: String
}
object ClassRepresentation {
def unapply[T](classRep: ClassRepresentation[T]): Option[(Option[T], Option[AbstractFile])] =
Some((classRep.binary, classRep.source))
}
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