| // Lucene version compatibility level 4.8.1 |
| using System; |
| |
| namespace Lucene.Net.Facet.Taxonomy.WriterCache |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// Utilities for use of <see cref="FacetLabel"/> by <see cref="CompactLabelToOrdinal"/>. |
| /// </summary> |
| internal class CategoryPathUtils |
| { |
| /// <summary> |
| /// Serializes the given <see cref="FacetLabel"/> to the <see cref="CharBlockArray"/>. |
| /// </summary> |
| public static void Serialize(FacetLabel cp, CharBlockArray charBlockArray) |
| { |
| charBlockArray.Append((char)cp.Length); |
| if (cp.Length == 0) |
| { |
| return; |
| } |
| for (int i = 0; i < cp.Length; i++) |
| { |
| charBlockArray.Append((char)cp.Components[i].Length); |
| charBlockArray.Append(cp.Components[i]); |
| } |
| } |
| |
| /// <summary> |
| /// Calculates a hash function of a path that was serialized with |
| /// <see cref="Serialize(FacetLabel, CharBlockArray)"/>. |
| /// </summary> |
| public static int HashCodeOfSerialized(CharBlockArray charBlockArray, int offset) |
| { |
| int length = charBlockArray[offset++]; |
| if (length == 0) |
| { |
| return 0; |
| } |
| |
| int hash = length; |
| for (int i = 0; i < length; i++) |
| { |
| int len = charBlockArray[offset++]; |
| hash = hash * 31 + charBlockArray.Subsequence(offset, len).GetHashCode(); // LUCENENET: Corrected 2nd Subsequence parameter |
| offset += len; |
| } |
| return hash; |
| } |
| |
| /// <summary> |
| /// Check whether the <see cref="FacetLabel"/> is equal to the one serialized in |
| /// <see cref="CharBlockArray"/>. |
| /// </summary> |
| public static bool EqualsToSerialized(FacetLabel cp, CharBlockArray charBlockArray, int offset) |
| { |
| int n = charBlockArray[offset++]; |
| if (cp.Length != n) |
| { |
| return false; |
| } |
| if (cp.Length == 0) |
| { |
| return true; |
| } |
| |
| for (int i = 0; i < cp.Length; i++) |
| { |
| int len = charBlockArray[offset++]; |
| if (len != cp.Components[i].Length) |
| { |
| return false; |
| } |
| |
| if (!cp.Components[i].Equals(charBlockArray.Subsequence(offset, len).ToString(), StringComparison.Ordinal)) // LUCENENET: Corrected 2nd Subsequence parameter |
| { |
| return false; |
| } |
| offset += len; |
| } |
| return true; |
| } |
| } |
| } |