Class DocValuesFieldExistsQuery


  • public final class DocValuesFieldExistsQuery
    extends Query
    A Query that matches documents that have a value for a given field as reported by doc values iterators.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.lang.String field  
    • Constructor Summary

      Constructors 
      Constructor Description
      DocValuesFieldExistsQuery​(java.lang.String field)
      Create a query that will match documents which have a value for the given field.
    • Field Detail

      • field

        private final java.lang.String field
    • Constructor Detail

      • DocValuesFieldExistsQuery

        public DocValuesFieldExistsQuery​(java.lang.String field)
        Create a query that will match documents which have a value for the given field.
    • Method Detail

      • getField

        public java.lang.String getField()
      • 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()
      • 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)
      • 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
      • 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
      • createWeight

        public Weight createWeight​(IndexSearcher searcher,
                                   ScoreMode scoreMode,
                                   float boost)
        Description copied from class: Query
        Expert: Constructs an appropriate Weight implementation for this query.

        Only implemented by primitive queries, which re-write to themselves.

        Overrides:
        createWeight in class Query
        scoreMode - How the produced scorers will be consumed.
        boost - The boost that is propagated by the parent queries.
      • getDocValuesDocIdSetIterator

        public static DocIdSetIterator getDocValuesDocIdSetIterator​(java.lang.String field,
                                                                    LeafReader reader)
                                                             throws java.io.IOException
        Returns a DocIdSetIterator from the given field or null if the field doesn't exist in the reader or if the reader has no doc values for the field.
        Throws:
        java.io.IOException