Class TermAutomatonQuery

    • Field Detail

      • BASE_RAM_BYTES

        private static final long BASE_RAM_BYTES
      • field

        private final java.lang.String field
      • termToID

        private final java.util.Map<BytesRef,​java.lang.Integer> termToID
      • idToTerm

        private final java.util.Map<java.lang.Integer,​BytesRef> idToTerm
      • anyTermID

        private int anyTermID
    • Constructor Detail

      • TermAutomatonQuery

        public TermAutomatonQuery​(java.lang.String field)
    • Method Detail

      • createState

        public int createState()
        Returns a new state; state 0 is always the initial state.
      • setAccept

        public void setAccept​(int state,
                              boolean accept)
        Marks the specified state as accept or not.
      • addTransition

        public void addTransition​(int source,
                                  int dest,
                                  java.lang.String term)
        Adds a transition to the automaton.
      • addTransition

        public void addTransition​(int source,
                                  int dest,
                                  BytesRef term)
        Adds a transition to the automaton.
      • addAnyTransition

        public void addAnyTransition​(int source,
                                     int dest)
        Adds a transition matching any term.
      • finish

        public void finish()
        Call this once you are done adding states/transitions.
      • finish

        public void finish​(int determinizeWorkLimit)
        Call this once you are done adding states/transitions.
        Parameters:
        determinizeWorkLimit - Maximum effort to spend determinizing the automaton. Higher numbers allow this operation to consume more memory but allow more complex automatons. Use Operations.DEFAULT_DETERMINIZE_WORK_LIMIT as a decent default if you don't otherwise know what to specify.
      • createWeight

        public Weight createWeight​(IndexSearcher searcher,
                                   ScoreMode scoreMode,
                                   float boost)
                            throws java.io.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
        scoreMode - How the produced scorers will be consumed.
        boost - The boost that is propagated by the parent queries.
        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
      • getTermID

        private int getTermID​(BytesRef term)
      • 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)
      • ramBytesUsed

        public long ramBytesUsed()
        Description copied from interface: Accountable
        Return the memory usage of this object in bytes. Negative values are illegal.
        Specified by:
        ramBytesUsed in interface Accountable
      • toDot

        public java.lang.String toDot()
        Returns the dot (graphviz) representation of this automaton. This is extremely useful for visualizing the automaton.
      • 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.

        Callers are expected to call rewrite multiple times if necessary, until the rewritten query is the same as the original query.

        Overrides:
        rewrite in class Query
        Throws:
        java.io.IOException
        See Also:
        IndexSearcher.rewrite(Query)
      • 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