1 files changed, 53 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/util/ClassFileLookup.scala b/src/compiler/scala/tools/nsc/util/ClassFileLookup.scala
new file mode 100644
index 0000000000..b36580e6c4
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/util/ClassFileLookup.scala
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2014 Contributor. All rights reserved.
+ */
+package scala.tools.nsc.util
+
+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
+
+  /** The whole sourcepath in the form of one String.
+    */
+  def asSourcePathString: String
+}
+
+/**
+ * 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))
+}