| /* |
| * 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 System; |
| |
| using ArrayUtil = Lucene.Net.Util.ArrayUtil; |
| using Similarity = Lucene.Net.Search.Similarity; |
| |
| namespace Lucene.Net.Index |
| { |
| |
| /// <summary>Taps into DocInverter, as an InvertedDocEndConsumer, |
| /// which is called at the end of inverting each field. We |
| /// just look at the length for the field (docState.length) |
| /// and record the norm. |
| /// </summary> |
| |
| sealed class NormsWriterPerField:InvertedDocEndConsumerPerField, System.IComparable<NormsWriterPerField> |
| { |
| |
| internal NormsWriterPerThread perThread; |
| internal FieldInfo fieldInfo; |
| internal DocumentsWriter.DocState docState; |
| |
| // Holds all docID/norm pairs we've seen |
| internal int[] docIDs = new int[1]; |
| internal byte[] norms = new byte[1]; |
| internal int upto; |
| |
| internal FieldInvertState fieldState; |
| |
| public void Reset() |
| { |
| // Shrink back if we are overallocated now: |
| docIDs = ArrayUtil.Shrink(docIDs, upto); |
| norms = ArrayUtil.Shrink(norms, upto); |
| upto = 0; |
| } |
| |
| public NormsWriterPerField(DocInverterPerField docInverterPerField, NormsWriterPerThread perThread, FieldInfo fieldInfo) |
| { |
| this.perThread = perThread; |
| this.fieldInfo = fieldInfo; |
| docState = perThread.docState; |
| fieldState = docInverterPerField.fieldState; |
| } |
| |
| internal override void Abort() |
| { |
| upto = 0; |
| } |
| |
| public int CompareTo(NormsWriterPerField other) |
| { |
| return String.CompareOrdinal(fieldInfo.name, other.fieldInfo.name); |
| } |
| |
| internal override void Finish() |
| { |
| System.Diagnostics.Debug.Assert(docIDs.Length == norms.Length); |
| if (fieldInfo.isIndexed && !fieldInfo.omitNorms) |
| { |
| if (docIDs.Length <= upto) |
| { |
| System.Diagnostics.Debug.Assert(docIDs.Length == upto); |
| docIDs = ArrayUtil.Grow(docIDs, 1 + upto); |
| norms = ArrayUtil.Grow(norms, 1 + upto); |
| } |
| float norm = docState.similarity.ComputeNorm(fieldInfo.name, fieldState); |
| norms[upto] = Similarity.EncodeNorm(norm); |
| docIDs[upto] = docState.docID; |
| upto++; |
| } |
| } |
| } |
| } |