Index: MultiSearcher.java
===================================================================
RCS file: /home/cvspublic/jakarta-lucene/src/java/org/apache/lucene/search/MultiSearcher.java,v
retrieving revision 1.17
diff -u -r1.17 MultiSearcher.java
--- MultiSearcher.java	29 Mar 2004 22:48:03 -0000	1.17
+++ MultiSearcher.java	12 Nov 2004 09:37:44 -0000
@@ -27,18 +27,28 @@
  * or {@link #search(Query,Filter)} methods.
  */
 public class MultiSearcher extends Searcher {
-  private Searchable[] searchables;
+  private Searcher[] searchables;
   private int[] starts;
   private int maxDoc = 0;
+  
+  private class MultiSimilarity extends DefaultSimilarity {
+      /* (non-Javadoc)
+     * @see org.apache.lucene.search.Similarity#idf(org.apache.lucene.index.Term, org.apache.lucene.search.Searcher)
+     */
+    public float idf(Term term, Searcher searcher) throws IOException {
+        return super.idf(term, MultiSearcher.this);
+    }
+  }
 
   /** Creates a searcher which searches <i>searchables</i>. */
-  public MultiSearcher(Searchable[] searchables) throws IOException {
+  public MultiSearcher(Searcher[] searchables) throws IOException {
     this.searchables = searchables;
 
     starts = new int[searchables.length + 1];	  // build starts array
     for (int i = 0; i < searchables.length; i++) {
       starts[i] = maxDoc;
       maxDoc += searchables[i].maxDoc();          // compute maxDocs
+      setSimilarity(new MultiSimilarity());
     }
     starts[searchables.length] = maxDoc;
   }
@@ -187,4 +197,10 @@
     return searchables[i].explain(query,doc-starts[i]); // dispatch to searcher
   }
 
+  public void setSimilarity(Similarity similarity) {
+    super.setSimilarity(similarity);
+    for (int i = 0; i < searchables.length; i++) {
+        searchables[i].setSimilarity(similarity);
+    }
+  }
 }