| // Lucene version compatibility level 4.8.1 |
| using Lucene.Net.Support; |
| |
| namespace Lucene.Net.Facet.Taxonomy |
| { |
| /* |
| * 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. |
| */ |
| |
| using BytesRef = Lucene.Net.Util.BytesRef; |
| using Document = Lucene.Net.Documents.Document; |
| |
| /// <summary> |
| /// Add an instance of this to your <see cref="Document"/> to add |
| /// a facet label associated with an <see cref="int"/>. Use <see cref="TaxonomyFacetSumInt32Associations"/> |
| /// to aggregate int values per facet label at search time. |
| /// <para/> |
| /// NOTE: This was IntAssociationFacetField in Lucene |
| /// <para/> |
| /// @lucene.experimental |
| /// </summary> |
| public class Int32AssociationFacetField : AssociationFacetField |
| { |
| /// <summary> |
| /// Creates this from <paramref name="dim"/> and <paramref name="path"/> and an |
| /// int association |
| /// </summary> |
| public Int32AssociationFacetField(int assoc, string dim, params string[] path) |
| : base(Int32ToBytesRef(assoc), dim, path) |
| { |
| } |
| |
| /// <summary> |
| /// Encodes an <see cref="int"/> as a 4-byte <see cref="BytesRef"/>, |
| /// big-endian. |
| /// <para/> |
| /// NOTE: This was intToBytesRef() in Lucene |
| /// </summary> |
| public static BytesRef Int32ToBytesRef(int v) |
| { |
| byte[] bytes = new byte[4]; |
| // big-endian: |
| bytes[0] = (byte)(v >> 24); |
| bytes[1] = (byte)(v >> 16); |
| bytes[2] = (byte)(v >> 8); |
| bytes[3] = (byte)v; |
| return new BytesRef(bytes); |
| } |
| |
| /// <summary> |
| /// Decodes a previously encoded <see cref="int"/>. |
| /// <para/> |
| /// NOTE: This was bytesRefToInt() in Lucene |
| /// </summary> |
| public static int BytesRefToInt32(BytesRef b) |
| { |
| return ((b.Bytes[b.Offset] & 0xFF) << 24) | ((b.Bytes[b.Offset + 1] & 0xFF) << 16) | |
| ((b.Bytes[b.Offset + 2] & 0xFF) << 8) | (b.Bytes[b.Offset + 3] & 0xFF); |
| } |
| |
| public override string ToString() |
| { |
| return "Int32AssociationFacetField(dim=" + Dim + " path=" + Arrays.ToString(Path) + " value=" + BytesRefToInt32(Assoc) + ")"; |
| } |
| } |
| } |