| /* |
| * 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. |
| */ |
| |
| package org.apache.lucene.index; |
| |
| import java.io.IOException; |
| import org.apache.lucene.codecs.Codec; |
| import org.apache.lucene.codecs.KnnFieldVectorsWriter; |
| import org.apache.lucene.codecs.KnnVectorsFormat; |
| import org.apache.lucene.codecs.KnnVectorsWriter; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.util.Accountable; |
| import org.apache.lucene.util.IOUtils; |
| import org.apache.lucene.util.InfoStream; |
| |
| /** |
| * Streams vector values for indexing to the given codec's vectors writer. The codec's vectors |
| * writer is responsible for buffering and processing vectors. |
| */ |
| class VectorValuesConsumer { |
| private final Codec codec; |
| private final Directory directory; |
| private final SegmentInfo segmentInfo; |
| private final InfoStream infoStream; |
| |
| private Accountable accountable = Accountable.NULL_ACCOUNTABLE; |
| private KnnVectorsWriter writer; |
| |
| VectorValuesConsumer( |
| Codec codec, Directory directory, SegmentInfo segmentInfo, InfoStream infoStream) { |
| this.codec = codec; |
| this.directory = directory; |
| this.segmentInfo = segmentInfo; |
| this.infoStream = infoStream; |
| } |
| |
| private void initKnnVectorsWriter(String fieldName) throws IOException { |
| if (writer == null) { |
| KnnVectorsFormat fmt = codec.knnVectorsFormat(); |
| if (fmt == null) { |
| throw new IllegalStateException( |
| "field=\"" |
| + fieldName |
| + "\" was indexed as vectors but codec does not support vectors"); |
| } |
| SegmentWriteState initialWriteState = |
| new SegmentWriteState(infoStream, directory, segmentInfo, null, null, IOContext.DEFAULT); |
| writer = fmt.fieldsWriter(initialWriteState); |
| accountable = writer; |
| } |
| } |
| |
| public KnnFieldVectorsWriter<?> addField(FieldInfo fieldInfo) throws IOException { |
| initKnnVectorsWriter(fieldInfo.name); |
| return writer.addField(fieldInfo); |
| } |
| |
| void flush(SegmentWriteState state, Sorter.DocMap sortMap) throws IOException { |
| if (writer == null) return; |
| try { |
| writer.flush(state.segmentInfo.maxDoc(), sortMap); |
| writer.finish(); |
| } finally { |
| IOUtils.close(writer); |
| } |
| } |
| |
| void abort() { |
| IOUtils.closeWhileHandlingException(writer); |
| } |
| |
| public Accountable getAccountable() { |
| return accountable; |
| } |
| } |