Example usage for org.apache.lucene.codecs CodecUtil writeIndexHeader

Introduction

In this page you can find the example usage for org.apache.lucene.codecs CodecUtil writeIndexHeader.

Prototype

public static void writeIndexHeader(DataOutput out, String codec, int version, byte[] id, String suffix)
        throws IOException 

Source Link

Document

Writes a codec header for an index file, which records both a string to identify the format of the file, a version number, and data to identify the file instance (ID and auxiliary suffix such as generation).

Usage

From source file:com.vmware.xenon.services.common.Lucene60FieldInfosFormatWithCache.java

License:Open Source License

@Override
public void write(Directory directory, SegmentInfo segmentInfo, String segmentSuffix, FieldInfos infos,
        IOContext context) throws IOException {
    final String fileName = IndexFileNames.segmentFileName(segmentInfo.name, segmentSuffix, EXTENSION);
    try (IndexOutput output = directory.createOutput(fileName, context)) {
        CodecUtil.writeIndexHeader(output, Lucene60FieldInfosFormatWithCache.CODEC_NAME,
                Lucene60FieldInfosFormatWithCache.FORMAT_CURRENT, segmentInfo.getId(), segmentSuffix);
        output.writeVInt(infos.size());/*  w ww  .  j a  va2  s  .co  m*/
        for (FieldInfo fi : infos) {
            fi.checkConsistency();

            output.writeString(fi.name);
            output.writeVInt(fi.number);

            byte bits = 0x0;
            if (fi.hasVectors()) {
                bits |= STORE_TERMVECTOR;
            }
            if (fi.omitsNorms()) {
                bits |= OMIT_NORMS;
            }
            if (fi.hasPayloads()) {
                bits |= STORE_PAYLOADS;
            }
            output.writeByte(bits);

            output.writeByte(indexOptionsByte(fi.getIndexOptions()));

            // pack the DV type and hasNorms in one byte
            output.writeByte(docValuesByte(fi.getDocValuesType()));
            output.writeLong(fi.getDocValuesGen());
            output.writeMapOfStrings(fi.attributes());
            int pointDimensionCount = fi.getPointDimensionCount();
            output.writeVInt(pointDimensionCount);
            if (pointDimensionCount != 0) {
                output.writeVInt(fi.getPointNumBytes());
            }
        }
        CodecUtil.writeFooter(output);
    }
}

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