content: /*
   * 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.
   */
  
  package org.apache.cassandra.db.tries;
  
  import java.util.Arrays;
  
  import org.agrona.DirectBuffer;
  import org.apache.cassandra.utils.bytecomparable.ByteComparable;
  
  public class TriePathReconstructor implements Trie.ResettingTransitionsReceiver
  {
      protected byte[] keyBytes = new byte[32];
      protected int keyPos = 0;
  
      public void addPathByte(int nextByte)
      {
          if (keyPos >= keyBytes.length)
              keyBytes = Arrays.copyOf(keyBytes, keyPos * 2);
          keyBytes[keyPos++] = (byte) nextByte;
      }
  
      public void addPathBytes(DirectBuffer buffer, int pos, int count)
      {
          int newPos = keyPos + count;
          if (newPos > keyBytes.length)
              keyBytes = Arrays.copyOf(keyBytes, Math.max(newPos + 16, keyBytes.length * 2));
          buffer.getBytes(pos, keyBytes, keyPos, count);
          keyPos = newPos;
      }
  
      public void resetPathLength(int newLength)
      {
          keyPos = newLength;
      }
  
      static ByteComparable toByteComparable(byte[] bytes, int byteLength)
      {
          return ByteComparable.fixedLength(Arrays.copyOf(bytes, byteLength));
      }
  }
  