1 files changed, 40 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/backend/icode/Repository.scala b/src/compiler/scala/tools/nsc/backend/icode/Repository.scala
new file mode 100644
index 0000000000..9a60f671ef
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/backend/icode/Repository.scala
@@ -0,0 +1,40 @@
+package scala.tools.nsc.backend.icode;
+
+import scala.collection._
+
+trait Repository {
+  val global: Global
+  import global._
+  import icodes._
+
+  val loaded: mutable.Map[Symbol, IClass] = new mutable.HashMap
+
+  /** Is the given class available as icode? */
+  def available(sym: Symbol) = classes.contains(sym) || loaded.contains(sym)
+
+  /** The icode of the given class, if available */
+  def icode(sym: Symbol): Option[IClass] =
+    if (classes.contains(sym)) Some(classes(sym))
+    else if (loaded.contains(sym)) Some(loaded(sym))
+    else None
+
+  /** The icode of the given class. If not available, it loads
+   *  its bytecode.
+   */
+  def icode(sym: Symbol, force: Boolean): IClass =
+    if (available(sym)) icode(sym).get
+    else {
+      load(sym)
+      assert(available(sym))
+      loaded(sym)
+    }
+
+  /** Load bytecode for given symbol. */
+  private def load(sym: Symbol) {
+    val (c1, c2) = icodeReader.readClass(sym)
+
+    assert(c1.symbol == sym || c2.symbol == sym)
+    loaded += c1.symbol -> c1
+    loaded += c2.symbol -> c2
+  }
+}