Package org.apache.lucene.search.uhighlight

Class UnifiedHighlighter.TermVectorReusingLeafReader

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable
    Enclosing class:
    UnifiedHighlighter
    private static class UnifiedHighlighter.TermVectorReusingLeafReader
extends FilterLeafReader
    Wraps an IndexReader that remembers/caches the last call to IndexReader.getTermVectors(int) so that if the next call has the same ID, then it is reused. If TV's were column-stride (like doc-values), there would be no need for this.

    • Field Detail

      • lastDocId

        private int lastDocId

      • tvFields

        private Fields tvFields

    • Constructor Detail

      • TermVectorReusingLeafReader

        TermVectorReusingLeafReader​(LeafReader in)

    • Method Detail

      • wrap

        static IndexReader wrap​(IndexReader reader)
                 throws java.io.IOException
        Throws:
        java.io.IOException

      • getTermVectors

        public Fields getTermVectors​(int docID)
                      throws java.io.IOException
        Description copied from class: IndexReader
        Retrieve term vectors for this document, or null if term vectors were not indexed. The returned Fields instance acts like a single-document inverted index (the docID will be 0).
        Overrides:
        getTermVectors in class FilterLeafReader
        Throws:
        java.io.IOException

      • getCoreCacheHelper

        public IndexReader.CacheHelper getCoreCacheHelper()
        Description copied from class: LeafReader
        Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this leaf regardless of deletions. Two readers that have the same data but different sets of deleted documents or doc values updates may be considered equal. Consider using IndexReader.getReaderCacheHelper() if you need deletions or dv updates to be taken into account.

        A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped leaf reader.

        Specified by:
        getCoreCacheHelper in class LeafReader

      • getReaderCacheHelper

        public IndexReader.CacheHelper getReaderCacheHelper()
        Description copied from class: IndexReader
        Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader. Two readers that have different data or different sets of deleted documents will be considered different.

        A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped reader.

        Specified by:
        getReaderCacheHelper in class IndexReader