Class FilterLeafReader

    • Field Detail

      • in

        protected final LeafReader in
        The underlying LeafReader.
    • Constructor Detail

      • FilterLeafReader

        protected FilterLeafReader​(LeafReader in)
        Construct a FilterLeafReader based on the specified base reader.

        Note that base reader is closed if this FilterLeafReader is closed.

        Parameters:
        in - specified base reader.
    • Method Detail

      • getLiveDocs

        public Bits getLiveDocs()
        Description copied from class: LeafReader
        Returns the Bits representing live (not deleted) docs. A set bit indicates the doc ID has not been deleted. If this method returns null it means there are no deleted documents (all documents are live).

        The returned instance has been safely published for use by multiple threads without additional synchronization.

        Specified by:
        getLiveDocs in class LeafReader
      • getFieldInfos

        public FieldInfos getFieldInfos()
        Description copied from class: LeafReader
        Get the FieldInfos describing all fields in this reader.

        Note: Implementations should cache the FieldInfos instance returned by this method such that subsequent calls to this method return the same instance.

        Specified by:
        getFieldInfos in class LeafReader
      • getPointValues

        public PointValues getPointValues​(java.lang.String field)
                                   throws java.io.IOException
        Description copied from class: LeafReader
        Returns the PointValues used for numeric or spatial searches for the given field, or null if there are no point fields.
        Specified by:
        getPointValues in class LeafReader
        Throws:
        java.io.IOException
      • getVectorValues

        public VectorValues getVectorValues​(java.lang.String field)
                                     throws java.io.IOException
        Description copied from class: LeafReader
        Returns VectorValues for this field, or null if no VectorValues were indexed. The returned instance should only be used by a single thread.
        Specified by:
        getVectorValues in class LeafReader
        Throws:
        java.io.IOException
      • searchNearestVectors

        public TopDocs searchNearestVectors​(java.lang.String field,
                                            float[] target,
                                            int k,
                                            Bits acceptDocs,
                                            int visitedLimit)
                                     throws java.io.IOException
        Description copied from class: LeafReader
        Return the k nearest neighbor documents as determined by comparison of their vector values for this field, to the given vector, by the field's similarity function. The score of each document is derived from the vector similarity in a way that ensures scores are positive and that a larger score corresponds to a higher ranking.

        The search is allowed to be approximate, meaning the results are not guaranteed to be the true k closest neighbors. For large values of k (for example when k is close to the total number of documents), the search may also retrieve fewer than k documents.

        The returned TopDocs will contain a ScoreDoc for each nearest neighbor, sorted in order of their similarity to the query vector (decreasing scores). The TotalHits contains the number of documents visited during the search. If the search stopped early because it hit visitedLimit, it is indicated through the relation TotalHits.Relation.GREATER_THAN_OR_EQUAL_TO.

        Specified by:
        searchNearestVectors in class LeafReader
        Parameters:
        field - the vector field to search
        target - the vector-valued query
        k - the number of docs to return
        acceptDocs - Bits that represents the allowed documents to match, or null if they are all allowed to match.
        visitedLimit - the maximum number of nodes that the search is allowed to visit
        Returns:
        the k nearest neighbor documents, along with their (searchStrategy-specific) scores.
        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).
        Specified by:
        getTermVectors in class IndexReader
        Throws:
        java.io.IOException
      • numDocs

        public int numDocs()
        Description copied from class: IndexReader
        Returns the number of documents in this index.

        NOTE: This operation may run in O(maxDoc). Implementations that can't return this number in constant-time should cache it.

        Specified by:
        numDocs in class IndexReader
      • maxDoc

        public int maxDoc()
        Description copied from class: IndexReader
        Returns one greater than the largest possible document number. This may be used to, e.g., determine how big to allocate an array which will have an element for every document number in an index.
        Specified by:
        maxDoc in class IndexReader
      • doClose

        protected void doClose()
                        throws java.io.IOException
        Description copied from class: IndexReader
        Implements close.
        Specified by:
        doClose in class IndexReader
        Throws:
        java.io.IOException
      • terms

        public Terms terms​(java.lang.String field)
                    throws java.io.IOException
        Description copied from class: LeafReader
        Returns the Terms index for this field, or null if it has none.
        Specified by:
        terms in class LeafReader
        Throws:
        java.io.IOException
      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
      • getNumericDocValues

        public NumericDocValues getNumericDocValues​(java.lang.String field)
                                             throws java.io.IOException
        Description copied from class: LeafReader
        Returns NumericDocValues for this field, or null if no numeric doc values were indexed for this field. The returned instance should only be used by a single thread.
        Specified by:
        getNumericDocValues in class LeafReader
        Throws:
        java.io.IOException
      • getBinaryDocValues

        public BinaryDocValues getBinaryDocValues​(java.lang.String field)
                                           throws java.io.IOException
        Description copied from class: LeafReader
        Returns BinaryDocValues for this field, or null if no binary doc values were indexed for this field. The returned instance should only be used by a single thread.
        Specified by:
        getBinaryDocValues in class LeafReader
        Throws:
        java.io.IOException
      • checkIntegrity

        public void checkIntegrity()
                            throws java.io.IOException
        Description copied from class: LeafReader
        Checks consistency of this reader.

        Note that this may be costly in terms of I/O, e.g. may involve computing a checksum value against large data files.

        Specified by:
        checkIntegrity in class LeafReader
        Throws:
        java.io.IOException