| /* |
| * 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 Lucene.Net.Support; |
| |
| namespace Lucene.Net.Index |
| { |
| |
| // TODO FI: some of this is "generic" to TermsHash* so we |
| // should factor it out so other consumers don't have to |
| // duplicate this code |
| |
| /// <summary>Used by DocumentsWriter to merge the postings from |
| /// multiple ThreadStates when creating a segment |
| /// </summary> |
| sealed class FreqProxFieldMergeState |
| { |
| |
| internal FreqProxTermsWriterPerField field; |
| internal int numPostings; |
| internal CharBlockPool charPool; |
| internal RawPostingList[] postings; |
| |
| private FreqProxTermsWriter.PostingList p; |
| internal char[] text; |
| internal int textOffset; |
| |
| private int postingUpto = - 1; |
| |
| internal ByteSliceReader freq = new ByteSliceReader(); |
| internal ByteSliceReader prox = new ByteSliceReader(); |
| |
| internal int docID; |
| internal int termFreq; |
| |
| public FreqProxFieldMergeState(FreqProxTermsWriterPerField field) |
| { |
| this.field = field; |
| this.charPool = field.perThread.termsHashPerThread.charPool; |
| this.numPostings = field.termsHashPerField.numPostings; |
| this.postings = field.termsHashPerField.SortPostings(); |
| } |
| |
| internal bool NextTerm() |
| { |
| postingUpto++; |
| if (postingUpto == numPostings) |
| return false; |
| |
| p = (FreqProxTermsWriter.PostingList) postings[postingUpto]; |
| docID = 0; |
| |
| text = charPool.buffers[p.textStart >> DocumentsWriter.CHAR_BLOCK_SHIFT]; |
| textOffset = p.textStart & DocumentsWriter.CHAR_BLOCK_MASK; |
| |
| field.termsHashPerField.InitReader(freq, p, 0); |
| if (!field.fieldInfo.omitTermFreqAndPositions) |
| field.termsHashPerField.InitReader(prox, p, 1); |
| |
| // Should always be true |
| bool result = NextDoc(); |
| System.Diagnostics.Debug.Assert(result); |
| |
| return true; |
| } |
| |
| public bool NextDoc() |
| { |
| if (freq.Eof()) |
| { |
| if (p.lastDocCode != - 1) |
| { |
| // Return last doc |
| docID = p.lastDocID; |
| if (!field.omitTermFreqAndPositions) |
| termFreq = p.docFreq; |
| p.lastDocCode = - 1; |
| return true; |
| } |
| // EOF |
| else |
| return false; |
| } |
| |
| int code = freq.ReadVInt(); |
| if (field.omitTermFreqAndPositions) |
| docID += code; |
| else |
| { |
| docID += Number.URShift(code, 1); |
| if ((code & 1) != 0) |
| termFreq = 1; |
| else |
| termFreq = freq.ReadVInt(); |
| } |
| |
| System.Diagnostics.Debug.Assert(docID != p.lastDocID); |
| |
| return true; |
| } |
| } |
| } |