content: 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 org.apache.lucene.util.ArrayUtil;
  import org.apache.lucene.util.RamUsageEstimator;
  
  class ParallelPostingsArray {
    final static int BYTES_PER_POSTING = 3 * RamUsageEstimator.NUM_BYTES_INT;
  
    final int size;
    final int[] textStarts;
    final int[] intStarts;
    final int[] byteStarts;
  
    ParallelPostingsArray(final int size) {
      this.size = size;
      textStarts = new int[size];
      intStarts = new int[size];
      byteStarts = new int[size];
    }
  
    int bytesPerPosting() {
      return BYTES_PER_POSTING;
    }
  
    ParallelPostingsArray newInstance(int size) {
      return new ParallelPostingsArray(size);
    }
  
    final ParallelPostingsArray grow() {
      int newSize = ArrayUtil.oversize(size + 1, bytesPerPosting());
      ParallelPostingsArray newArray = newInstance(newSize);
      copyTo(newArray, size);
      return newArray;
    }
  
    void copyTo(ParallelPostingsArray toArray, int numToCopy) {
      System.arraycopy(textStarts, 0, toArray.textStarts, 0, numToCopy);
      System.arraycopy(intStarts, 0, toArray.intStarts, 0, numToCopy);
      System.arraycopy(byteStarts, 0, toArray.byteStarts, 0, numToCopy);
    }
  }
  