1 files changed, 66 insertions, 0 deletions
diff --git a/cask/src/cask/router/Result.scala b/cask/src/cask/router/Result.scala
new file mode 100644
index 0000000..52ef0f8
--- /dev/null
+++ b/cask/src/cask/router/Result.scala
@@ -0,0 +1,66 @@
+package cask.router
+
+
+
+
+/**
+ * Represents what comes out of an attempt to invoke an [[EntryPoint]].
+ * Could succeed with a value, but could fail in many different ways.
+ */
+sealed trait Result[+T]{
+  def map[V](f: T => V): Result[V]
+}
+object Result{
+
+  /**
+   * Invoking the [[EntryPoint]] was totally successful, and returned a
+   * result
+   */
+  case class Success[T](value: T) extends Result[T]{
+    def map[V](f: T => V) = Success(f(value))
+  }
+
+  /**
+   * Invoking the [[EntryPoint]] was not successful
+   */
+  sealed trait Error extends Result[Nothing]{
+    def map[V](f: Nothing => V) = this
+  }
+
+
+  object Error{
+
+
+    /**
+     * Invoking the [[EntryPoint]] failed with an exception while executing
+     * code within it.
+     */
+    case class Exception(t: Throwable) extends Error
+
+    /**
+     * Invoking the [[EntryPoint]] failed because the arguments provided
+     * did not line up with the arguments expected
+     */
+    case class MismatchedArguments(missing: Seq[ArgSig[_, _, _, _]],
+                                   unknown: Seq[String]) extends Error
+    /**
+     * Invoking the [[EntryPoint]] failed because there were problems
+     * deserializing/parsing individual arguments
+     */
+    case class InvalidArguments(values: Seq[ParamError]) extends Error
+  }
+
+  sealed trait ParamError
+  object ParamError{
+    /**
+     * Something went wrong trying to de-serialize the input parameter;
+     * the thrown exception is stored in [[ex]]
+     */
+    case class Invalid(arg: ArgSig[_, _, _, _], value: String, ex: Throwable) extends ParamError
+    /**
+     * Something went wrong trying to evaluate the default value
+     * for this input parameter
+     */
+    case class DefaultFailed(arg: ArgSig[_, _, _, _], ex: Throwable) extends ParamError
+  }
+}
+\ No newline at end of file