| /* |
| * 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)); |
| } |
| } |