| using Lucene.Net.Diagnostics; |
| using System; |
| using System.Diagnostics; |
| using System.Runtime.CompilerServices; |
| |
| namespace Lucene.Net.Codecs |
| { |
| /* |
| * 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 FieldInfo = Lucene.Net.Index.FieldInfo; |
| using Fields = Lucene.Net.Index.Fields; |
| using MergeState = Lucene.Net.Index.MergeState; |
| |
| // javadocs |
| using Terms = Lucene.Net.Index.Terms; |
| |
| /// <summary> |
| /// Abstract API that consumes terms, doc, freq, prox, offset and |
| /// payloads postings. Concrete implementations of this |
| /// actually do "something" with the postings (write it into |
| /// the index in a specific format). |
| /// <para/> |
| /// The lifecycle is: |
| /// <list type="number"> |
| /// <item><description>FieldsConsumer is created by |
| /// <see cref="PostingsFormat.FieldsConsumer(Index.SegmentWriteState)"/>.</description></item> |
| /// <item><description>For each field, <see cref="AddField(FieldInfo)"/> is called, |
| /// returning a <see cref="TermsConsumer"/> for the field.</description></item> |
| /// <item><description>After all fields are added, the consumer is <see cref="Dispose()"/>d.</description></item> |
| /// </list> |
| /// <para/> |
| /// @lucene.experimental |
| /// </summary> |
| public abstract class FieldsConsumer : IDisposable |
| { |
| /// <summary> |
| /// Sole constructor. (For invocation by subclass |
| /// constructors, typically implicit.) |
| /// </summary> |
| protected internal FieldsConsumer() |
| { |
| } |
| |
| /// <summary> |
| /// Add a new field. </summary> |
| public abstract TermsConsumer AddField(FieldInfo field); |
| |
| /// <summary> |
| /// Called when we are done adding everything. </summary> |
| // LUCENENET specific - implementing proper dispose pattern |
| public void Dispose() |
| { |
| Dispose(true); |
| GC.SuppressFinalize(this); |
| } |
| |
| /// <summary> |
| /// Implementations must override and should dispose all resources used by this instance. |
| /// </summary> |
| protected abstract void Dispose(bool disposing); |
| |
| /// <summary> |
| /// Called during merging to merge all <see cref="Fields"/> from |
| /// sub-readers. this must recurse to merge all postings |
| /// (terms, docs, positions, etc.). A |
| /// <see cref="PostingsFormat"/> can override this default |
| /// implementation to do its own merging. |
| /// </summary> |
| [MethodImpl(MethodImplOptions.NoInlining)] |
| public virtual void Merge(MergeState mergeState, Fields fields) |
| { |
| foreach (string field in fields) |
| { |
| FieldInfo info = mergeState.FieldInfos.FieldInfo(field); |
| if (Debugging.AssertsEnabled) Debugging.Assert(info != null, () => "FieldInfo for field is null: " + field); |
| Terms terms = fields.GetTerms(field); |
| if (terms != null) |
| { |
| TermsConsumer termsConsumer = AddField(info); |
| termsConsumer.Merge(mergeState, info.IndexOptions, terms.GetEnumerator()); |
| } |
| } |
| } |
| } |
| } |