issue/50 Removed SegmentPostingsTestFactory for just using VecPostings

1 files changed, 19 insertions, 1 deletions

diff --git a/src/query/scorer.rs b/src/query/scorer.rs
index 32ed4b4..7513705 100644
--- a/src/query/scorer.rs
+++ b/src/query/scorer.rs
@@ -1,7 +1,10 @@
 use DocSet;
 use collector::Collector;
+use std::ops::{Deref, DerefMut};
 
-/// Scored `DocSet`
+/// Scored set of documents matching a query within a specific segment.
+/// 
+/// See [Query](./trait.Query.html).
 pub trait Scorer: DocSet {
     
     /// Returns the score.
@@ -9,6 +12,8 @@ pub trait Scorer: DocSet {
     /// This method will perform a bit of computation and is not cached.
     fn score(&self,) -> f32;
     
+    /// Consumes the complete `DocSet` and
+    /// push the scored documents to the collector. 
     fn collect(&mut self, collector: &mut Collector) {
         while self.advance() {
             collector.collect(self.doc(), self.score());
@@ -16,3 +21,16 @@ pub trait Scorer: DocSet {
     }
 } 
 
+
+impl<'a> Scorer for Box<Scorer + 'a> {
+    fn score(&self,) -> f32 {
+        self.deref().score()
+    }
+    
+    fn collect(&mut self, collector: &mut Collector) {
+        let scorer = self.deref_mut();
+        while scorer.advance() {
+            collector.collect(scorer.doc(), scorer.score());
+        }
+    }
+}
\ No newline at end of file