Class PerFieldPostingsFormat.FieldsWriter

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable
    Enclosing class:
    PerFieldPostingsFormat

    private class PerFieldPostingsFormat.FieldsWriter
    extends FieldsConsumer
    • Field Detail

      • toClose

        final java.util.List<java.io.Closeable> toClose
    • Method Detail

      • write

        public void write​(Fields fields,
                          NormsProducer norms)
                   throws java.io.IOException
        Description copied from class: FieldsConsumer
        Write all fields, terms and postings. This the "pull" API, allowing you to iterate more than once over the postings, somewhat analogous to using a DOM API to traverse an XML tree.

        Notes:

        • You must compute index statistics, including each Term's docFreq and totalTermFreq, as well as the summary sumTotalTermFreq, sumTotalDocFreq and docCount.
        • You must skip terms that have no docs and fields that have no terms, even though the provided Fields API will expose them; this typically requires lazily writing the field or term until you've actually seen the first term or document.
        • The provided Fields instance is limited: you cannot call any methods that return statistics/counts; you cannot pass a non-null live docs when pulling docs/positions enums.
        Specified by:
        write in class FieldsConsumer
        Throws:
        java.io.IOException
      • merge

        public void merge​(MergeState mergeState,
                          NormsProducer norms)
                   throws java.io.IOException
        Description copied from class: FieldsConsumer
        Merges in the fields from the readers in mergeState. The default implementation skips and maps around deleted documents, and calls FieldsConsumer.write(Fields,NormsProducer). Implementations can override this method for more sophisticated merging (bulk-byte copying, etc).
        Overrides:
        merge in class FieldsConsumer
        Throws:
        java.io.IOException
      • close

        public void close()
                   throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Specified by:
        close in class FieldsConsumer
        Throws:
        java.io.IOException