docs/attachments/LUCENE-6476/LUCENE-6476.patch

Index: lucene/core/src/java/org/apache/lucene/index/TermContext.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/TermContext.java	(revision 1678760)
+++ lucene/core/src/java/org/apache/lucene/index/TermContext.java	(working copy)
@@ -117,16 +117,31 @@
    * should be derived from a {@link IndexReaderContext}'s leaf ord.
    */
   public void register(TermState state, final int ord, final int docFreq, final long totalTermFreq) {
+    register(state, ord);
+    accumulateStatistics(docFreq, totalTermFreq);
+  }
+
+  /**
+   * Expert: Registers and associates a {@link TermState} with an leaf ordinal. The
+   * leaf ordinal should be derived from a {@link IndexReaderContext}'s leaf ord.
+   * On the contrary to {@link #register(TermState, int, int, long)} this method
+   * does NOT update term statistics.
+   */
+  public void register(TermState state, final int ord) {
     assert state != null : "state must not be null";
     assert ord >= 0 && ord < states.length;
     assert states[ord] == null : "state for ord: " + ord
         + " already registered";
+    states[ord] = state;
+  }
+
+  /** Expert: Accumulate term statistics. */
+  public void accumulateStatistics(final int docFreq, final long totalTermFreq) {
     this.docFreq += docFreq;
     if (this.totalTermFreq >= 0 && totalTermFreq >= 0)
       this.totalTermFreq += totalTermFreq;
     else
       this.totalTermFreq = -1;
-    states[ord] = state;
   }
 
   /**
Index: lucene/sandbox/src/java/org/apache/lucene/sandbox/queries/FuzzyLikeThisQuery.java
===================================================================
--- lucene/sandbox/src/java/org/apache/lucene/sandbox/queries/FuzzyLikeThisQuery.java	(revision 1678760)
+++ lucene/sandbox/src/java/org/apache/lucene/sandbox/queries/FuzzyLikeThisQuery.java	(working copy)
@@ -277,11 +277,11 @@
         if (terms != null) {
           TermsEnum termsEnum = terms.iterator();
           if (termsEnum.seekExact(term.bytes())) {
-            int freq = 1 - context.docFreq(); // we want the total df and ttf to be 1
-            context.register(termsEnum.termState(), leafContext.ord, freq, freq);
+            context.register(termsEnum.termState(), leafContext.ord);
           }
         }
       }
+      context.accumulateStatistics(1, 1);
       return new TermQuery(term, context);
     }
   }