content: 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.index.FieldInfo.IndexOptions;
  import org.apache.lucene.store.IndexOutput;
  import org.apache.lucene.util.IOUtils;
  
  
  import java.io.Closeable;
  import java.io.IOException;
  
  final class FormatPostingsPositionsWriter extends FormatPostingsPositionsConsumer implements Closeable {
  
    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
        out = parent.parent.parent.dir.createOutput(IndexFileNames.segmentFileName(parent.parent.parent.segment, IndexFileNames.PROX_EXTENSION));
        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.indexOptions == IndexOptions.DOCS_ONLY;
      storePayloads = omitTermFreqAndPositions ? false : fieldInfo.storePayloads;
    }
  
    /** Called when we are done adding positions & payloads */
    @Override
    void finish() {       
      lastPosition = 0;
      lastPayloadLength = -1;
    }
  
    public void close() throws IOException {
      IOUtils.close(out);
    }
  }
  