| package org.apache.lucene.index; |
| |
| /** |
| * 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. |
| */ |
| |
| import org.apache.lucene.store.IndexOutput; |
| |
| |
| import java.io.IOException; |
| |
| final class FormatPostingsPositionsWriter extends FormatPostingsPositionsConsumer { |
| |
| final FormatPostingsDocsWriter parent; |
| final IndexOutput out; |
| |
| boolean omitTermFreqAndPositions; |
| boolean storePayloads; |
| int lastPayloadLength = -1; |
| |
| FormatPostingsPositionsWriter(SegmentWriteState state, FormatPostingsDocsWriter parent) throws IOException { |
| this.parent = parent; |
| omitTermFreqAndPositions = parent.omitTermFreqAndPositions; |
| if (parent.parent.parent.fieldInfos.hasProx()) { |
| // At least one field does not omit TF, so create the |
| // prox file |
| final String fileName = IndexFileNames.segmentFileName(parent.parent.parent.segment, IndexFileNames.PROX_EXTENSION); |
| state.flushedFiles.add(fileName); |
| out = parent.parent.parent.dir.createOutput(fileName); |
| parent.skipListWriter.setProxOutput(out); |
| } else |
| // Every field omits TF so we will write no prox file |
| out = null; |
| } |
| |
| int lastPosition; |
| |
| /** Add a new position & payload */ |
| @Override |
| void addPosition(int position, byte[] payload, int payloadOffset, int payloadLength) throws IOException { |
| assert !omitTermFreqAndPositions: "omitTermFreqAndPositions is true"; |
| assert out != null; |
| |
| final int delta = position - lastPosition; |
| lastPosition = position; |
| |
| if (storePayloads) { |
| if (payloadLength != lastPayloadLength) { |
| lastPayloadLength = payloadLength; |
| out.writeVInt((delta<<1)|1); |
| out.writeVInt(payloadLength); |
| } else |
| out.writeVInt(delta << 1); |
| if (payloadLength > 0) |
| out.writeBytes(payload, payloadLength); |
| } else |
| out.writeVInt(delta); |
| } |
| |
| void setField(FieldInfo fieldInfo) { |
| omitTermFreqAndPositions = fieldInfo.omitTermFreqAndPositions; |
| storePayloads = omitTermFreqAndPositions ? false : fieldInfo.storePayloads; |
| } |
| |
| /** Called when we are done adding positions & payloads */ |
| @Override |
| void finish() { |
| lastPosition = 0; |
| lastPayloadLength = -1; |
| } |
| |
| void close() throws IOException { |
| if (out != null) |
| out.close(); |
| } |
| } |