Class NearestFuzzyQuery


  • public class NearestFuzzyQuery
    extends Query
    Simplification of FuzzyLikeThisQuery, to be used in the context of KNN classification.
    • Constructor Detail

      • NearestFuzzyQuery

        public NearestFuzzyQuery​(Analyzer analyzer)
        Default constructor
        Parameters:
        analyzer - the analyzer used to process the query text
    • Method Detail

      • addTerms

        public void addTerms​(java.lang.String queryString,
                             java.lang.String fieldName)
        Adds user input for "fuzzification"
        Parameters:
        queryString - The string which will be parsed by the analyzer and for which fuzzy variants will be parsed
      • idf

        private float idf​(int docFreq,
                          int docCount)
      • newTermQuery

        private Query newTermQuery​(IndexReader reader,
                                   Term term)
                            throws java.io.IOException
        Throws:
        java.io.IOException
      • rewrite

        public Query rewrite​(IndexReader reader)
                      throws java.io.IOException
        Description copied from class: Query
        Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.
        Overrides:
        rewrite in class Query
        Throws:
        java.io.IOException
      • toString

        public java.lang.String toString​(java.lang.String field)
        Description copied from class: Query
        Prints a query to a string, with field assumed to be the default field and omitted.
        Specified by:
        toString in class Query
      • hashCode

        public int hashCode()
        Description copied from class: Query
        Override and implement query hash code properly in a subclass. This is required so that QueryCache works properly.
        Specified by:
        hashCode in class Query
        See Also:
        Query.equals(Object)
      • equals

        public boolean equals​(java.lang.Object other)
        Description copied from class: Query
        Override and implement query instance equivalence properly in a subclass. This is required so that QueryCache works properly. Typically a query will be equal to another only if it's an instance of the same class and its document-filtering properties are identical that other instance. Utility methods are provided for certain repetitive code.
        Specified by:
        equals in class Query
        See Also:
        Query.sameClassAs(Object), Query.classHash()
      • visit

        public void visit​(QueryVisitor visitor)
        Description copied from class: Query
        Recurse through the query tree, visiting any child queries
        Overrides:
        visit in class Query
        Parameters:
        visitor - a QueryVisitor to be called by each query in the tree