Class RegexCompletionQuery


public class RegexCompletionQuery extends CompletionQuery
A CompletionQuery which takes a regular expression as the prefix of the query term.

Example usage of querying a prefix of 'sug' and 'sub' as a regular expression against a suggest field 'suggest_field':

  CompletionQuery query = new RegexCompletionQuery(new Term("suggest_field", "su[g|b]"));
 

See RegExp for the supported regular expression syntax

  • Field Details

    • flags

      private final int flags
    • determinizeWorkLimit

      private final int determinizeWorkLimit
  • Constructor Details

  • Method Details

    • createWeight

      public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException
      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
      Parameters:
      scoreMode - How the produced scorers will be consumed.
      boost - The boost that is propagated by the parent queries.
      Throws:
      IOException
    • getFlags

      public int getFlags()
      Get the regex flags
    • getDeterminizeWorkLimit

      public int getDeterminizeWorkLimit()
      Get the maximum effort permitted to determinize the automaton
    • equals

      public boolean equals(Object o)
      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 to those of the other instance. Utility methods are provided for certain repetitive code.

      Specified by:
      equals in class Query
      See Also:
    • 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:
    • visit

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