Class NormsFormat

  • Direct Known Subclasses:

    public abstract class NormsFormat
    extends Object
    Encodes/decodes per-document score normalization values.
    • Constructor Detail

      • NormsFormat

        protected NormsFormat()
        Sole constructor. (For invocation by subclass constructors, typically implicit.)
    • Method Detail

      • normsProducer

        public abstract NormsProducer normsProducer​(SegmentReadState state)
                                             throws IOException
        Returns a NormsProducer to read norms from the index.

        NOTE: by the time this call returns, it must hold open any files it will need to use; else, those files may be deleted. Additionally, required files may be deleted during the execution of this call before there is a chance to open them. Under these circumstances an IOException should be thrown by the implementation. IOExceptions are expected and will automatically cause a retry of the segment opening logic with the newly revised segments.