pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / src / java / org / apache / lucene / util / ReaderUtil.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/util/ReaderUtil.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/util/ReaderUtil.java
deleted file mode 100644 (file)
index 6755e68..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/util/ReaderUtil.java
+++ /dev/null
@@ -1,154 +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.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.lucene.index.IndexReader;
-
-/**
- * Common util methods for dealing with {@link IndexReader}s.
- *
- * @lucene.internal
- */
-public final class ReaderUtil {
-
-  private ReaderUtil() {} // no instance
-
-  /**
-   * Gathers sub-readers from reader into a List.
-   * 
-   * @param allSubReaders
-   * @param reader
-   */
-  public static void gatherSubReaders(List<IndexReader> allSubReaders, IndexReader reader) {
-    IndexReader[] subReaders = reader.getSequentialSubReaders();
-    if (subReaders == null) {
-      // Add the reader itself, and do not recurse
-      allSubReaders.add(reader);
-    } else {
-      for (int i = 0; i < subReaders.length; i++) {
-        gatherSubReaders(allSubReaders, subReaders[i]);
-      }
-    }
-  }
-
-  /** Recursively visits all sub-readers of a reader.  You
-   *  should subclass this and override the add method to
-   *  gather what you need.
-   *
-   * @lucene.experimental */
-  public static abstract class Gather {
-    private final IndexReader topReader;
-
-    public Gather(IndexReader r) {
-      topReader = r;
-    }
-
-    public int run() throws IOException {
-      return run(0, topReader);
-    }
-
-    public int run(int docBase) throws IOException {
-      return run(docBase, topReader);
-    }
-
-    private int run(int base, IndexReader reader) throws IOException {
-      IndexReader[] subReaders = reader.getSequentialSubReaders();
-      if (subReaders == null) {
-        // atomic reader
-        add(base, reader);
-        base += reader.maxDoc();
-      } else {
-        // composite reader
-        for (int i = 0; i < subReaders.length; i++) {
-          base = run(base, subReaders[i]);
-        }
-      }
-
-      return base;
-    }
-
-    protected abstract void add(int base, IndexReader r) throws IOException;
-  }
-
-  /**
-   * Returns sub IndexReader that contains the given document id.
-   *    
-   * @param doc id of document
-   * @param reader parent reader
-   * @return sub reader of parent which contains the specified doc id
-   */
-  public static IndexReader subReader(int doc, IndexReader reader) {
-    List<IndexReader> subReadersList = new ArrayList<IndexReader>();
-    ReaderUtil.gatherSubReaders(subReadersList, reader);
-    IndexReader[] subReaders = subReadersList
-        .toArray(new IndexReader[subReadersList.size()]);
-    int[] docStarts = new int[subReaders.length];
-    int maxDoc = 0;
-    for (int i = 0; i < subReaders.length; i++) {
-      docStarts[i] = maxDoc;
-      maxDoc += subReaders[i].maxDoc();
-    }
-    return subReaders[ReaderUtil.subIndex(doc, docStarts)];
-  }
-  
-  /**
-   * Returns sub-reader subIndex from reader.
-   * 
-   * @param reader parent reader
-   * @param subIndex index of desired sub reader
-   * @return the subreader at subIndex
-   */
-  public static IndexReader subReader(IndexReader reader, int subIndex) {
-    List<IndexReader> subReadersList = new ArrayList<IndexReader>();
-    ReaderUtil.gatherSubReaders(subReadersList, reader);
-    IndexReader[] subReaders = subReadersList
-        .toArray(new IndexReader[subReadersList.size()]);
-    return subReaders[subIndex];
-  }
-
-
-  /**
-   * 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;
-  }
-}