Index: lucene/CHANGES.txt
===================================================================
--- lucene/CHANGES.txt	(revision 1352563)
+++ lucene/CHANGES.txt	(working copy)
@@ -283,6 +283,9 @@
   removed, as IndexReaderContext.leaves() is now the preferred way
   to access sub-readers.  (Uwe Schindler)
 
+* LUCENE-4155: oal.util.ReaderUtil class was moved to oal.index package.
+  (Uwe Schindler)
+
 Changes in Runtime Behavior
 
 * LUCENE-2846: omitNorms now behaves like omitTermFrequencyAndPositions, if you
Index: lucene/core/src/java/org/apache/lucene/index/AtomicReader.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/AtomicReader.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/AtomicReader.java	(working copy)
@@ -22,7 +22,6 @@
 import org.apache.lucene.search.SearcherManager; // javadocs
 import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderUtil;         // for javadocs
 
 /** {@code AtomicReader} is an abstract class, providing an interface for accessing an
  index.  Search of an index is done entirely through this abstract interface,
Index: lucene/core/src/java/org/apache/lucene/index/BaseCompositeReader.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/BaseCompositeReader.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/BaseCompositeReader.java	(working copy)
@@ -23,7 +23,6 @@
 import java.util.List;
 
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderUtil;
 
 /** Base class for implementing {@link CompositeReader}s based on an array
  * of sub-readers. The implementing class has to add code for
Index: lucene/core/src/java/org/apache/lucene/index/BitsSlice.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/BitsSlice.java	(revision 0)
+++ lucene/core/src/java/org/apache/lucene/index/BitsSlice.java	(working copy)
@@ -0,0 +1,51 @@
+package org.apache.lucene.index;
+
+import org.apache.lucene.util.Bits;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Exposes a slice of an existing Bits as a new Bits.
+ *
+ * @lucene.internal
+ */
+final class BitsSlice implements Bits {
+  private final Bits parent;
+  private final int start;
+  private final int length;
+
+  // start is inclusive; end is exclusive (length = end-start)
+  public BitsSlice(Bits parent, ReaderSlice slice) {
+    this.parent = parent;
+    this.start = slice.start;
+    this.length = slice.length;
+    assert length >= 0: "length=" + length;
+  }
+    
+  public boolean get(int doc) {
+    if (doc >= length) {
+      throw new RuntimeException("doc " + doc + " is out of bounds 0 .. " + (length-1));
+    }
+    assert doc < length: "doc=" + doc + " length=" + length;
+    return parent.get(doc+start);
+  }
+
+  public int length() {
+    return length;
+  }
+}
Index: lucene/core/src/java/org/apache/lucene/index/BitsSlice.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/BitsSlice.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/BitsSlice.java	(working copy)

Property changes on: lucene/core/src/java/org/apache/lucene/index/BitsSlice.java
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: lucene/core/src/java/org/apache/lucene/index/IndexReader.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/IndexReader.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/IndexReader.java	(working copy)
@@ -31,7 +31,6 @@
 import org.apache.lucene.store.*;
 import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderUtil;         // for javadocs
 
 /** IndexReader is an abstract class, providing an interface for accessing an
  index.  Search of an index is done entirely through this abstract interface,
Index: lucene/core/src/java/org/apache/lucene/index/MultiBits.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiBits.java	(revision 0)
+++ lucene/core/src/java/org/apache/lucene/index/MultiBits.java	(working copy)
@@ -0,0 +1,115 @@
+package org.apache.lucene.index;
+
+import org.apache.lucene.util.Bits;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Concatenates multiple Bits together, on every lookup.
+ *
+ * <p><b>NOTE</b>: This is very costly, as every lookup must
+ * do a binary search to locate the right sub-reader.
+ *
+ * @lucene.experimental
+ */
+final class MultiBits implements Bits {
+  private final Bits[] subs;
+
+  // length is 1+subs.length (the last entry has the maxDoc):
+  private final int[] starts;
+
+  private final boolean defaultValue;
+
+  public MultiBits(Bits[] subs, int[] starts, boolean defaultValue) {
+    assert starts.length == 1+subs.length;
+    this.subs = subs;
+    this.starts = starts;
+    this.defaultValue = defaultValue;
+  }
+
+  private boolean checkLength(int reader, int doc) {
+    final int length = starts[1+reader]-starts[reader];
+    assert doc - starts[reader] < length: "doc=" + doc + " reader=" + reader + " starts[reader]=" + starts[reader] + " length=" + length;
+    return true;
+  }
+
+  public boolean get(int doc) {
+    final int reader = ReaderUtil.subIndex(doc, starts);
+    assert reader != -1;
+    final Bits bits = subs[reader];
+    if (bits == null) {
+      return defaultValue;
+    } else {
+      assert checkLength(reader, doc);
+      return bits.get(doc-starts[reader]);
+    }
+  }
+  
+  @Override
+  public String toString() {
+    StringBuilder b = new StringBuilder();
+    b.append(subs.length + " subs: ");
+    for(int i=0;i<subs.length;i++) {
+      if (i != 0) {
+        b.append("; ");
+      }
+      if (subs[i] == null) {
+        b.append("s=" + starts[i] + " l=null");
+      } else {
+        b.append("s=" + starts[i] + " l=" + subs[i].length() + " b=" + subs[i]);
+      }
+    }
+    b.append(" end=" + starts[subs.length]);
+    return b.toString();
+  }
+
+  /**
+   * Represents a sub-Bits from 
+   * {@link MultiBits#getMatchingSub(org.apache.lucene.index.ReaderSlice) getMatchingSub()}.
+   */
+  public final static class SubResult {
+    public boolean matches;
+    public Bits result;
+  }
+
+  /**
+   * Returns a sub-Bits matching the provided <code>slice</code>
+   * <p>
+   * Because <code>null</code> usually has a special meaning for
+   * Bits (e.g. no deleted documents), you must check
+   * {@link SubResult#matches} instead to ensure the sub was 
+   * actually found.
+   */
+  public SubResult getMatchingSub(ReaderSlice slice) {
+    int reader = ReaderUtil.subIndex(slice.start, starts);
+    assert reader != -1;
+    assert reader < subs.length: "slice=" + slice + " starts[-1]=" + starts[starts.length-1];
+    final SubResult subResult = new SubResult();
+    if (starts[reader] == slice.start && starts[1+reader] == slice.start+slice.length) {
+      subResult.matches = true;
+      subResult.result = subs[reader];
+    } else {
+      subResult.matches = false;
+    }
+    return subResult;
+  }
+
+  public int length() {
+    return starts[starts.length-1];
+  }
+}
Index: lucene/core/src/java/org/apache/lucene/index/MultiBits.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiBits.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiBits.java	(working copy)

Property changes on: lucene/core/src/java/org/apache/lucene/index/MultiBits.java
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: lucene/core/src/java/org/apache/lucene/index/MultiDocsAndPositionsEnum.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiDocsAndPositionsEnum.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiDocsAndPositionsEnum.java	(working copy)
@@ -18,7 +18,6 @@
  */
 
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderSlice;
 
 import java.io.IOException;
 
Index: lucene/core/src/java/org/apache/lucene/index/MultiDocsEnum.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiDocsEnum.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiDocsEnum.java	(working copy)
@@ -17,7 +17,6 @@
  * limitations under the License.
  */
 
-import org.apache.lucene.util.ReaderSlice;
 
 import java.io.IOException;
 import java.util.Arrays;
Index: lucene/core/src/java/org/apache/lucene/index/MultiDocValues.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiDocValues.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiDocValues.java	(working copy)
@@ -28,7 +28,6 @@
 import org.apache.lucene.util.ArrayUtil;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.PagedBytes;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.packed.PackedInts.Reader;
 
 /**
Index: lucene/core/src/java/org/apache/lucene/index/MultiFields.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiFields.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiFields.java	(working copy)
@@ -27,8 +27,6 @@
 
 import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.MultiBits;
-import org.apache.lucene.util.ReaderSlice;
 
 /**
  * Exposes flex API, merged from flex API of sub-segments.
Index: lucene/core/src/java/org/apache/lucene/index/MultiFieldsEnum.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiFieldsEnum.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiFieldsEnum.java	(working copy)
@@ -18,7 +18,6 @@
  */
 
 import org.apache.lucene.util.PriorityQueue;
-import org.apache.lucene.util.ReaderSlice;
 
 import java.io.IOException;
 import java.util.List;
Index: lucene/core/src/java/org/apache/lucene/index/MultiTerms.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiTerms.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiTerms.java	(working copy)
@@ -23,7 +23,6 @@
 import java.util.List;
 
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderSlice;
 
 import org.apache.lucene.util.automaton.CompiledAutomaton;
 
Index: lucene/core/src/java/org/apache/lucene/index/MultiTermsEnum.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/MultiTermsEnum.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/MultiTermsEnum.java	(working copy)
@@ -20,9 +20,6 @@
 import org.apache.lucene.util.PriorityQueue;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.Bits;
-import org.apache.lucene.util.BitsSlice;
-import org.apache.lucene.util.MultiBits;
-import org.apache.lucene.util.ReaderSlice;
 
 import java.io.IOException;
 import java.util.Arrays;
Index: lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java	(revision 0)
+++ lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java	(working copy)
@@ -0,0 +1,41 @@
+package org.apache.lucene.index;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Subreader slice from a parent composite reader.
+ *
+ * @lucene.internal
+ */
+public final class ReaderSlice {
+  public static final ReaderSlice[] EMPTY_ARRAY = new ReaderSlice[0];
+  public final int start;
+  public final int length;
+  public final int readerIndex;
+
+  public ReaderSlice(int start, int length, int readerIndex) {
+    this.start = start;
+    this.length = length;
+    this.readerIndex = readerIndex;
+  }
+
+  @Override
+  public String toString() {
+    return "slice start=" + start + " length=" + length + " readerIndex=" + readerIndex;
+  }
+}
\ No newline at end of file
Index: lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java	(working copy)

Property changes on: lucene/core/src/java/org/apache/lucene/index/ReaderSlice.java
___________________________________________________________________
Added: svn:keywords
## -0,0 +1 ##
+Date Author Id Revision HeadURL
\ No newline at end of property
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java	(revision 0)
+++ lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java	(working copy)
@@ -0,0 +1,94 @@
+package org.apache.lucene.index;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.List;
+
+
+/**
+ * Common util methods for dealing with {@link IndexReader}s and {@link IndexReaderContext}s.
+ *
+ * @lucene.internal
+ */
+public final class ReaderUtil {
+
+  private ReaderUtil() {} // no instance
+
+  /**
+   * Walks up the reader tree and return the given context's top level reader
+   * context, or in other words the reader tree's root context.
+   */
+  public static IndexReaderContext getTopLevelContext(IndexReaderContext context) {
+    while (context.parent != null) {
+      context = context.parent;
+    }
+    return context;
+  }
+
+  /**
+   * Returns index of the searcher/reader for document <code>n</code> in the
+   * array used to construct this searcher/reader.
+   */
+  public static int subIndex(int n, int[] docStarts) { // find
+    // searcher/reader for doc n:
+    int size = docStarts.length;
+    int lo = 0; // search starts array
+    int hi = size - 1; // for first element less than n, return its index
+    while (hi >= lo) {
+      int mid = (lo + hi) >>> 1;
+      int midValue = docStarts[mid];
+      if (n < midValue)
+        hi = mid - 1;
+      else if (n > midValue)
+        lo = mid + 1;
+      else { // found a match
+        while (mid + 1 < size && docStarts[mid + 1] == midValue) {
+          mid++; // scan to last match
+        }
+        return mid;
+      }
+    }
+    return hi;
+  }
+  
+  /**
+   * Returns index of the searcher/reader for document <code>n</code> in the
+   * array used to construct this searcher/reader.
+   */
+  public static int subIndex(int n, List<AtomicReaderContext> leaves) { // find
+    // searcher/reader for doc n:
+    int size = leaves.size();
+    int lo = 0; // search starts array
+    int hi = size - 1; // for first element less than n, return its index
+    while (hi >= lo) {
+      int mid = (lo + hi) >>> 1;
+      int midValue = leaves.get(mid).docBase;
+      if (n < midValue)
+        hi = mid - 1;
+      else if (n > midValue)
+        lo = mid + 1;
+      else { // found a match
+        while (mid + 1 < size && leaves.get(mid + 1).docBase == midValue) {
+          mid++; // scan to last match
+        }
+        return mid;
+      }
+    }
+    return hi;
+  }
+}
Index: lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java	(working copy)

Property changes on: lucene/core/src/java/org/apache/lucene/index/ReaderUtil.java
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java	(working copy)
@@ -34,8 +34,6 @@
 import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.InfoStream;
-import org.apache.lucene.util.ReaderUtil;
-import org.apache.lucene.util.ReaderSlice;
 
 /**
  * The SegmentMerger class combines two or more Segments, represented by an IndexReader ({@link #add},
Index: lucene/core/src/java/org/apache/lucene/search/IndexSearcher.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/search/IndexSearcher.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/search/IndexSearcher.java	(working copy)
@@ -39,13 +39,13 @@
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.MultiFields;
 import org.apache.lucene.index.IndexReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.StoredFieldVisitor;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.index.Terms;
 import org.apache.lucene.search.similarities.DefaultSimilarity;
 import org.apache.lucene.search.similarities.Similarity;
 import org.apache.lucene.store.NIOFSDirectory;    // javadoc
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.TermContext;
 import org.apache.lucene.util.ThreadInterruptedException;
 import org.apache.lucene.index.IndexWriter; // javadocs
Index: lucene/core/src/java/org/apache/lucene/search/TermQuery.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/search/TermQuery.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/search/TermQuery.java	(working copy)
@@ -24,6 +24,7 @@
 import org.apache.lucene.index.DocsEnum;
 import org.apache.lucene.index.AtomicReader;
 import org.apache.lucene.index.IndexReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.index.TermState;
 import org.apache.lucene.index.TermsEnum;
@@ -31,7 +32,6 @@
 import org.apache.lucene.search.similarities.Similarity;
 import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.TermContext;
 import org.apache.lucene.util.ToStringUtils;
 
Index: lucene/core/src/java/org/apache/lucene/util/BitsSlice.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/util/BitsSlice.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/util/BitsSlice.java	(working copy)
@@ -1,46 +0,0 @@
-package org.apache.lucene.util;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/** Exposes a slice of an existing Bits as a new Bits. */
-
-public final class BitsSlice implements Bits {
-  private final Bits parent;
-  private final int start;
-  private final int length;
-
-  // start is inclusive; end is exclusive (length = end-start)
-  public BitsSlice(Bits parent, ReaderSlice slice) {
-    this.parent = parent;
-    this.start = slice.start;
-    this.length = slice.length;
-    assert length >= 0: "length=" + length;
-  }
-    
-  public boolean get(int doc) {
-    if (doc >= length) {
-      throw new RuntimeException("doc " + doc + " is out of bounds 0 .. " + (length-1));
-    }
-    assert doc < length: "doc=" + doc + " length=" + length;
-    return parent.get(doc+start);
-  }
-
-  public int length() {
-    return length;
-  }
-}
Index: lucene/core/src/java/org/apache/lucene/util/MultiBits.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/util/MultiBits.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/util/MultiBits.java	(working copy)
@@ -1,114 +0,0 @@
-package org.apache.lucene.util;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * Concatenates multiple Bits together, on every lookup.
- *
- * <p><b>NOTE</b>: This is very costly, as every lookup must
- * do a binary search to locate the right sub-reader.
- *
- * @lucene.experimental
- */
-
-public final class MultiBits implements Bits {
-  private final Bits[] subs;
-
-  // length is 1+subs.length (the last entry has the maxDoc):
-  private final int[] starts;
-
-  private final boolean defaultValue;
-
-  public MultiBits(Bits[] subs, int[] starts, boolean defaultValue) {
-    assert starts.length == 1+subs.length;
-    this.subs = subs;
-    this.starts = starts;
-    this.defaultValue = defaultValue;
-  }
-
-  private boolean checkLength(int reader, int doc) {
-    final int length = starts[1+reader]-starts[reader];
-    assert doc - starts[reader] < length: "doc=" + doc + " reader=" + reader + " starts[reader]=" + starts[reader] + " length=" + length;
-    return true;
-  }
-
-  public boolean get(int doc) {
-    final int reader = ReaderUtil.subIndex(doc, starts);
-    assert reader != -1;
-    final Bits bits = subs[reader];
-    if (bits == null) {
-      return defaultValue;
-    } else {
-      assert checkLength(reader, doc);
-      return bits.get(doc-starts[reader]);
-    }
-  }
-  
-  @Override
-  public String toString() {
-    StringBuilder b = new StringBuilder();
-    b.append(subs.length + " subs: ");
-    for(int i=0;i<subs.length;i++) {
-      if (i != 0) {
-        b.append("; ");
-      }
-      if (subs[i] == null) {
-        b.append("s=" + starts[i] + " l=null");
-      } else {
-        b.append("s=" + starts[i] + " l=" + subs[i].length() + " b=" + subs[i]);
-      }
-    }
-    b.append(" end=" + starts[subs.length]);
-    return b.toString();
-  }
-
-  /**
-   * Represents a sub-Bits from 
-   * {@link MultiBits#getMatchingSub(org.apache.lucene.util.ReaderSlice) getMatchingSub()}.
-   */
-  public final static class SubResult {
-    public boolean matches;
-    public Bits result;
-  }
-
-  /**
-   * Returns a sub-Bits matching the provided <code>slice</code>
-   * <p>
-   * Because <code>null</code> usually has a special meaning for
-   * Bits (e.g. no deleted documents), you must check
-   * {@link SubResult#matches} instead to ensure the sub was 
-   * actually found.
-   */
-  public SubResult getMatchingSub(ReaderSlice slice) {
-    int reader = ReaderUtil.subIndex(slice.start, starts);
-    assert reader != -1;
-    assert reader < subs.length: "slice=" + slice + " starts[-1]=" + starts[starts.length-1];
-    final SubResult subResult = new SubResult();
-    if (starts[reader] == slice.start && starts[1+reader] == slice.start+slice.length) {
-      subResult.matches = true;
-      subResult.result = subs[reader];
-    } else {
-      subResult.matches = false;
-    }
-    return subResult;
-  }
-
-  public int length() {
-    return starts[starts.length-1];
-  }
-}
Index: lucene/core/src/java/org/apache/lucene/util/ReaderSlice.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/util/ReaderSlice.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/util/ReaderSlice.java	(working copy)
@@ -1,39 +0,0 @@
-package org.apache.lucene.util;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * Subreader slice from a parent composite reader.
- */
-public final class ReaderSlice {
-  public static final ReaderSlice[] EMPTY_ARRAY = new ReaderSlice[0];
-  public final int start;
-  public final int length;
-  public final int readerIndex;
-
-  public ReaderSlice(int start, int length, int readerIndex) {
-    this.start = start;
-    this.length = length;
-    this.readerIndex = readerIndex;
-  }
-
-  @Override
-  public String toString() {
-    return "slice start=" + start + " length=" + length + " readerIndex=" + readerIndex;
-  }
-}
\ No newline at end of file
Index: lucene/core/src/java/org/apache/lucene/util/ReaderUtil.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/util/ReaderUtil.java	(revision 1352563)
+++ lucene/core/src/java/org/apache/lucene/util/ReaderUtil.java	(working copy)
@@ -1,97 +0,0 @@
-package org.apache.lucene.util;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import java.util.List;
-
-import org.apache.lucene.index.AtomicReaderContext;
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.IndexReaderContext;
-
-/**
- * Common util methods for dealing with {@link IndexReader}s.
- *
- * @lucene.internal
- */
-public final class ReaderUtil {
-
-  private ReaderUtil() {} // no instance
-
-  /**
-   * Walks up the reader tree and return the given context's top level reader
-   * context, or in other words the reader tree's root context.
-   */
-  public static IndexReaderContext getTopLevelContext(IndexReaderContext context) {
-    while (context.parent != null) {
-      context = context.parent;
-    }
-    return context;
-  }
-
-  /**
-   * Returns index of the searcher/reader for document <code>n</code> in the
-   * array used to construct this searcher/reader.
-   */
-  public static int subIndex(int n, int[] docStarts) { // find
-    // searcher/reader for doc n:
-    int size = docStarts.length;
-    int lo = 0; // search starts array
-    int hi = size - 1; // for first element less than n, return its index
-    while (hi >= lo) {
-      int mid = (lo + hi) >>> 1;
-      int midValue = docStarts[mid];
-      if (n < midValue)
-        hi = mid - 1;
-      else if (n > midValue)
-        lo = mid + 1;
-      else { // found a match
-        while (mid + 1 < size && docStarts[mid + 1] == midValue) {
-          mid++; // scan to last match
-        }
-        return mid;
-      }
-    }
-    return hi;
-  }
-  
-  /**
-   * Returns index of the searcher/reader for document <code>n</code> in the
-   * array used to construct this searcher/reader.
-   */
-  public static int subIndex(int n, List<AtomicReaderContext> leaves) { // find
-    // searcher/reader for doc n:
-    int size = leaves.size();
-    int lo = 0; // search starts array
-    int hi = size - 1; // for first element less than n, return its index
-    while (hi >= lo) {
-      int mid = (lo + hi) >>> 1;
-      int midValue = leaves.get(mid).docBase;
-      if (n < midValue)
-        hi = mid - 1;
-      else if (n > midValue)
-        lo = mid + 1;
-      else { // found a match
-        while (mid + 1 < size && leaves.get(mid + 1).docBase == midValue) {
-          mid++; // scan to last match
-        }
-        return mid;
-      }
-    }
-    return hi;
-  }
-}
Index: lucene/core/src/test/org/apache/lucene/search/spans/MultiSpansWrapper.java
===================================================================
--- lucene/core/src/test/org/apache/lucene/search/spans/MultiSpansWrapper.java	(revision 1352563)
+++ lucene/core/src/test/org/apache/lucene/search/spans/MultiSpansWrapper.java	(working copy)
@@ -27,9 +27,9 @@
 
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.IndexReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.search.DocIdSetIterator;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.TermContext;
 
 /**
Index: lucene/core/src/test/org/apache/lucene/search/spans/TestSpans.java
===================================================================
--- lucene/core/src/test/org/apache/lucene/search/spans/TestSpans.java	(revision 1352563)
+++ lucene/core/src/test/org/apache/lucene/search/spans/TestSpans.java	(working copy)
@@ -30,6 +30,7 @@
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.search.CheckHits;
 import org.apache.lucene.search.DocIdSetIterator;
@@ -41,7 +42,6 @@
 import org.apache.lucene.search.similarities.Similarity;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.util.LuceneTestCase;
-import org.apache.lucene.util.ReaderUtil;
 
 public class TestSpans extends LuceneTestCase {
   private IndexSearcher searcher;
Index: lucene/core/src/test/org/apache/lucene/search/TestTopDocsMerge.java
===================================================================
--- lucene/core/src/test/org/apache/lucene/search/TestTopDocsMerge.java	(revision 1352563)
+++ lucene/core/src/test/org/apache/lucene/search/TestTopDocsMerge.java	(working copy)
@@ -31,10 +31,10 @@
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.IndexReaderContext;
 import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.util.LuceneTestCase;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util._TestUtil;
 
 public class TestTopDocsMerge extends LuceneTestCase {
Index: lucene/grouping/src/test/org/apache/lucene/search/grouping/TestGrouping.java
===================================================================
--- lucene/grouping/src/test/org/apache/lucene/search/grouping/TestGrouping.java	(revision 1352563)
+++ lucene/grouping/src/test/org/apache/lucene/search/grouping/TestGrouping.java	(working copy)
@@ -23,6 +23,7 @@
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.CompositeReaderContext;
 import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.FieldInfo.IndexOptions;
 import org.apache.lucene.index.RandomIndexWriter;
 import org.apache.lucene.index.IndexReaderContext;
@@ -44,7 +45,6 @@
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.LuceneTestCase;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util._TestUtil;
 import org.apache.lucene.util.mutable.MutableValue;
 import org.apache.lucene.util.mutable.MutableValueStr;
Index: lucene/misc/src/java/org/apache/lucene/misc/HighFreqTerms.java
===================================================================
--- lucene/misc/src/java/org/apache/lucene/misc/HighFreqTerms.java	(revision 1352563)
+++ lucene/misc/src/java/org/apache/lucene/misc/HighFreqTerms.java	(working copy)
@@ -23,6 +23,7 @@
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.MultiFields;
 import org.apache.lucene.index.Fields;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.TermsEnum;
 import org.apache.lucene.index.FieldsEnum;
 import org.apache.lucene.index.Terms;
@@ -32,7 +33,6 @@
 import org.apache.lucene.util.PriorityQueue;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.Bits;
-import org.apache.lucene.util.ReaderUtil;
 
 import java.io.File;
 import java.io.IOException;
Index: lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/JoinDocFreqValueSource.java
===================================================================
--- lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/JoinDocFreqValueSource.java	(revision 1352563)
+++ lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/JoinDocFreqValueSource.java	(working copy)
@@ -22,11 +22,11 @@
 
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.docvalues.IntDocValues;
 import org.apache.lucene.search.FieldCache.DocTerms;
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.packed.PackedInts;
 
 /**
Index: lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/NumDocsValueSource.java
===================================================================
--- lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/NumDocsValueSource.java	(revision 1352563)
+++ lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/NumDocsValueSource.java	(working copy)
@@ -17,9 +17,9 @@
 package org.apache.lucene.queries.function.valuesource;
 
 import org.apache.lucene.index.AtomicReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
-import org.apache.lucene.util.ReaderUtil;
 
 import java.io.IOException;
 import java.util.Map;
Index: lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/OrdFieldSource.java
===================================================================
--- lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/OrdFieldSource.java	(revision 1352563)
+++ lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/OrdFieldSource.java	(working copy)
@@ -21,12 +21,12 @@
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.CompositeReader;
 import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.SlowCompositeReaderWrapper;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
 import org.apache.lucene.queries.function.docvalues.IntDocValues;
 import org.apache.lucene.search.FieldCache;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.mutable.MutableValue;
 import org.apache.lucene.util.mutable.MutableValueInt;
 
Index: lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/QueryValueSource.java
===================================================================
--- lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/QueryValueSource.java	(revision 1352563)
+++ lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/QueryValueSource.java	(working copy)
@@ -18,12 +18,12 @@
 package org.apache.lucene.queries.function.valuesource;
 
 import org.apache.lucene.index.AtomicReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
 import org.apache.lucene.queries.function.docvalues.FloatDocValues;
 import org.apache.lucene.search.*;
 import org.apache.lucene.util.Bits;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.mutable.MutableValue;
 import org.apache.lucene.util.mutable.MutableValueFloat;
 
Index: lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ReverseOrdFieldSource.java
===================================================================
--- lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ReverseOrdFieldSource.java	(revision 1352563)
+++ lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ReverseOrdFieldSource.java	(working copy)
@@ -21,12 +21,12 @@
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.CompositeReader;
 import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.SlowCompositeReaderWrapper;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
 import org.apache.lucene.queries.function.docvalues.IntDocValues;
 import org.apache.lucene.search.FieldCache;
-import org.apache.lucene.util.ReaderUtil;
 
 import java.io.IOException;
 import java.util.Map;
Index: lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ScaleFloatFunction.java
===================================================================
--- lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ScaleFloatFunction.java	(revision 1352563)
+++ lucene/queries/src/java/org/apache/lucene/queries/function/valuesource/ScaleFloatFunction.java	(working copy)
@@ -18,11 +18,11 @@
 package org.apache.lucene.queries.function.valuesource;
 
 import org.apache.lucene.index.AtomicReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
 import org.apache.lucene.queries.function.docvalues.FloatDocValues;
 import org.apache.lucene.search.IndexSearcher;
-import org.apache.lucene.util.ReaderUtil;
 
 import java.io.IOException;
 import java.util.List;
Index: lucene/suggest/src/java/org/apache/lucene/search/spell/SpellChecker.java
===================================================================
--- lucene/suggest/src/java/org/apache/lucene/search/spell/SpellChecker.java	(revision 1352563)
+++ lucene/suggest/src/java/org/apache/lucene/search/spell/SpellChecker.java	(working copy)
@@ -33,6 +33,7 @@
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.index.IndexWriterConfig.OpenMode;
 import org.apache.lucene.index.Terms;
@@ -47,7 +48,6 @@
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.BytesRefIterator;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.Version;
 
 /**
Index: solr/core/src/java/org/apache/solr/handler/component/QueryComponent.java
===================================================================
--- solr/core/src/java/org/apache/solr/handler/component/QueryComponent.java	(revision 1352563)
+++ solr/core/src/java/org/apache/solr/handler/component/QueryComponent.java	(working copy)
@@ -21,6 +21,7 @@
 import org.apache.lucene.document.StringField;
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.IndexReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.Term;
 import org.apache.lucene.queryparser.classic.ParseException;
 import org.apache.lucene.search.*;
@@ -29,7 +30,6 @@
 import org.apache.lucene.search.grouping.TopGroups;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CharsRef;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.lucene.util.UnicodeUtil;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.common.SolrDocument;
Index: solr/core/src/java/org/apache/solr/response/transform/ValueSourceAugmenter.java
===================================================================
--- solr/core/src/java/org/apache/solr/response/transform/ValueSourceAugmenter.java	(revision 1352563)
+++ solr/core/src/java/org/apache/solr/response/transform/ValueSourceAugmenter.java	(working copy)
@@ -22,9 +22,9 @@
 
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.solr.common.SolrDocument;
 import org.apache.solr.common.SolrException;
 import org.apache.solr.search.QParser;
Index: solr/core/src/java/org/apache/solr/schema/RandomSortField.java
===================================================================
--- solr/core/src/java/org/apache/solr/schema/RandomSortField.java	(revision 1352563)
+++ solr/core/src/java/org/apache/solr/schema/RandomSortField.java	(working copy)
@@ -23,11 +23,11 @@
 import org.apache.lucene.index.IndexableField;
 import org.apache.lucene.index.DirectoryReader;
 import org.apache.lucene.index.AtomicReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
 import org.apache.lucene.queries.function.docvalues.IntDocValues;
 import org.apache.lucene.search.*;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.solr.response.TextResponseWriter;
 import org.apache.solr.search.QParser;
 
Index: solr/core/src/java/org/apache/solr/search/function/FileFloatSource.java
===================================================================
--- solr/core/src/java/org/apache/solr/search/function/FileFloatSource.java	(revision 1352563)
+++ solr/core/src/java/org/apache/solr/search/function/FileFloatSource.java	(working copy)
@@ -31,6 +31,7 @@
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.MultiFields;
 import org.apache.lucene.index.IndexReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.index.TermsEnum;
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.queries.function.FunctionValues;
@@ -38,7 +39,6 @@
 import org.apache.lucene.queries.function.docvalues.FloatDocValues;
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.solr.core.SolrCore;
 import org.apache.solr.handler.RequestHandlerBase;
 import org.apache.solr.handler.RequestHandlerUtils;
Index: solr/core/src/test/org/apache/solr/search/TestIndexSearcher.java
===================================================================
--- solr/core/src/test/org/apache/solr/search/TestIndexSearcher.java	(revision 1352563)
+++ solr/core/src/test/org/apache/solr/search/TestIndexSearcher.java	(working copy)
@@ -18,9 +18,9 @@
 
 import org.apache.lucene.index.AtomicReaderContext;
 import org.apache.lucene.index.IndexReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.queries.function.FunctionValues;
 import org.apache.lucene.queries.function.ValueSource;
-import org.apache.lucene.util.ReaderUtil;
 import org.apache.solr.SolrTestCaseJ4;
 import org.apache.solr.request.SolrQueryRequest;
 import org.apache.solr.schema.SchemaField;