/* * Copyright 2004 The Apache Software Foundation * * Licensed 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 IndexInput = Lucene.Net.Store.IndexInput; namespace Lucene.Net.Index { sealed class SegmentTermPositions : SegmentTermDocs, TermPositions { private IndexInput proxStream; private int proxCount; private int position; internal SegmentTermPositions(SegmentReader p) : base(p) { this.proxStream = (IndexInput) parent.proxStream.Clone(); } internal override void Seek(TermInfo ti) { base.Seek(ti); if (ti != null) proxStream.Seek(ti.proxPointer); proxCount = 0; } public override void Close() { base.Close(); proxStream.Close(); } public int NextPosition() { proxCount--; return position += proxStream.ReadVInt(); } protected internal override void SkippingDoc() { for (int f = freq; f > 0; f--) // skip all positions proxStream.ReadVInt(); } public override bool Next() { for (int f = proxCount; f > 0; f--) // skip unread positions proxStream.ReadVInt(); if (base.Next()) { // run super proxCount = freq; // note frequency position = 0; // reset position return true; } return false; } public override int Read(int[] docs, int[] freqs) { throw new System.NotSupportedException("TermPositions does not support processing multiple documents in one call. Use TermDocs instead."); } /// Called by base.SkipTo(). protected internal override void SkipProx(long proxPointer) { proxStream.Seek(proxPointer); proxCount = 0; } } }