From b241f9b23b225dec5ffc3f8ddd6c81771091f599 Mon Sep 17 00:00:00 2001
From: Federico Igne <federico.igne@cs.ox.ac.uk>
Date: Mon, 7 Dec 2020 18:08:33 +0000
Subject: Add diagnostics for (un)filtered answer ratio

---
 src/main/scala/uk/ac/ox/cs/rsacomb/Main.scala      | 26 +++++++++++++++++-----
 .../scala/uk/ac/ox/cs/rsacomb/RSAOntology.scala    | 14 ++++++++++++
 .../rsacomb/sparql/ConjunctiveQueryAnswers.scala   |  3 +++
 3 files changed, 38 insertions(+), 5 deletions(-)

(limited to 'src/main')

diff --git a/src/main/scala/uk/ac/ox/cs/rsacomb/Main.scala b/src/main/scala/uk/ac/ox/cs/rsacomb/Main.scala
index 60511af..6891c8c 100644
--- a/src/main/scala/uk/ac/ox/cs/rsacomb/Main.scala
+++ b/src/main/scala/uk/ac/ox/cs/rsacomb/Main.scala
@@ -57,13 +57,29 @@ object RSAComb extends App {
     Logger print "Ontology is RSA!"
 
     /** Read SPARQL query from file */
-    val query = RDFoxUtil.loadQueryFromFile(queryPath.getAbsoluteFile)
-
-    /* Compute answers to query */
-    ConjunctiveQuery.parse(query).map(ontology ask _) match {
-      case Some(answers) => Logger print answers
+    val strQuery = RDFoxUtil.loadQueryFromFile(queryPath.getAbsoluteFile)
+    val query = ConjunctiveQuery parse strQuery
+
+    query match {
+      case Some(query) => {
+        val answers = ontology ask query
+        Logger.print(s"$answers", Logger.QUIET)
+        Logger print s"Number of answer: ${answers.length}"
+
+        val unfiltered = ontology askUnfiltered query
+        val percentage = unfiltered match {
+          case Some(u) =>
+            if (u.length > 0) (1 - answers.length / u.length) * 100 else 0
+          case None => 0
+        }
+        Logger.print(
+          s"Percentage of spurious answers: $percentage%",
+          Logger.DEBUG
+        )
+      }
       case None =>
         throw new RuntimeException("Submitted query is not conjunctive")
     }
+
   }
 }
diff --git a/src/main/scala/uk/ac/ox/cs/rsacomb/RSAOntology.scala b/src/main/scala/uk/ac/ox/cs/rsacomb/RSAOntology.scala
index 708e4c7..6a34555 100644
--- a/src/main/scala/uk/ac/ox/cs/rsacomb/RSAOntology.scala
+++ b/src/main/scala/uk/ac/ox/cs/rsacomb/RSAOntology.scala
@@ -403,6 +403,20 @@ class RSAOntology(val ontology: OWLOntology) {
     answers
   }
 
+  /** Returns set of unfiltered answers.
+    *
+    * This is equivalent to quering just the canonical model.
+    *
+    * @note this method does not load any data to RDFox. The return
+    * value is considered well defined only after
+    * [[uk.ac.ox.cs.rsacomb.RSAOntology.ask RSAOntology.ask]]
+    * for the corresponding query has been called.
+    */
+  def askUnfiltered(cq: ConjunctiveQuery): Option[Seq[Seq[Resource]]] = {
+    val query = RDFoxUtil.buildDescriptionQuery("QM", cq.variables.length)
+    queryDataStore(cq, query, RSA.Prefixes)
+  }
+
   def self(axiom: OWLSubClassOfAxiom): Set[Term] = {
     // Assuming just one role in the signature of a T5 axiom
     val role = axiom.objectPropertyExpressionsInSignature(0)
diff --git a/src/main/scala/uk/ac/ox/cs/rsacomb/sparql/ConjunctiveQueryAnswers.scala b/src/main/scala/uk/ac/ox/cs/rsacomb/sparql/ConjunctiveQueryAnswers.scala
index 327ae8e..50cbb86 100644
--- a/src/main/scala/uk/ac/ox/cs/rsacomb/sparql/ConjunctiveQueryAnswers.scala
+++ b/src/main/scala/uk/ac/ox/cs/rsacomb/sparql/ConjunctiveQueryAnswers.scala
@@ -17,6 +17,9 @@ class ConjunctiveQueryAnswers(
     val answers: Seq[Seq[Resource]]
 ) {
 
+  /** Returns number of answers. */
+  val length: Int = if (bcq) 0 else answers.length
+
   override def toString(): String =
     if (bcq) {
       if (answers.isEmpty) "FALSE" else "TRUE"
-- 
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