The PrefixQuery type exposes the following members.

Constructors

  NameDescription
Public methodPrefixQuery
Constructs a query for terms starting with
CopyC#
prefix
.

Methods

  NameDescription
Public methodClearTotalNumberOfTerms
Expert: Resets the counting of unique terms. Do this before executing the query/filter.
(Inherited from MultiTermQuery.)
Public methodClone
Returns a clone of this query.
(Inherited from Query.)
Public methodCombine
Expert: called when re-writing queries under MultiSearcher. Create a single query suitable for use by all subsearchers (in 1-1 correspondence with queries). This is an optimization of the OR of all queries. We handle the common optimization cases of equal queries and overlapping clauses of boolean OR queries (as generated by MultiTermQuery.rewrite()). Be careful overriding this method as queries[0] determines which method will be called and is not necessarily of the same type as the other queries.
(Inherited from Query.)
Public methodCreateWeight
Expert: Constructs an appropriate Weight implementation for this query.

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

(Inherited from Query.)
Public methodEquals (Overrides MultiTermQuery..::..Equals(Object).)
Public methodExtractTerms
Expert: adds all terms occuring in this query to the terms set. Only works if this query is in its {@link #rewrite rewritten} form.
(Inherited from Query.)
Protected methodFinalize
Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetBoost
Gets the boost for this clause. Documents matching this clause will (in addition to the normal weightings) have their score multiplied by
CopyC#
b
. The boost is 1.0 by default.
(Inherited from Query.)
Public methodGetEnum (Overrides MultiTermQuery..::..GetEnum(IndexReader).)
Public methodGetHashCode (Overrides MultiTermQuery..::..GetHashCode()()()().)
Public methodGetPrefix
Returns the prefix of this query.
Public methodGetRewriteMethod (Inherited from MultiTermQuery.)
Public methodGetSimilarity
Expert: Returns the Similarity implementation to be used for this query. Subclasses may override this method to specify their own Similarity implementation, perhaps one that delegates through that of the Searcher. By default the Searcher's Similarity implementation is returned.
(Inherited from Query.)
Public methodGetTerm Obsolete.
Returns the pattern term.
(Inherited from MultiTermQuery.)
Public methodGetTotalNumberOfTerms
Expert: Return the number of unique terms visited during execution of the query. If there are many of them, you may consider using another query type or optimize your total term count in index.

This method is not thread safe, be sure to only call it when no query is running! If you re-use the same query instance for another search, be sure to first reset the term counter with {@link #clearTotalNumberOfTerms}.

On optimized indexes / no MultiReaders, you get the correct number of unique terms for the whole index. Use this number to compare different queries. For non-optimized indexes this number can also be achived in non-constant-score mode. In constant-score mode you get the total number of terms seeked for all segments / sub-readers.

(Inherited from MultiTermQuery.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodIncTotalNumberOfTerms (Inherited from MultiTermQuery.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodRewrite (Inherited from MultiTermQuery.)
Public methodSetBoost
Sets the boost for this query clause to
CopyC#
b
. Documents matching this clause will (in addition to the normal weightings) have their score multiplied by
CopyC#
b
.
(Inherited from Query.)
Public methodSetRewriteMethod
Sets the rewrite method to be used when executing the query. You can use one of the four core methods, or implement your own subclass of {@link RewriteMethod}.
(Inherited from MultiTermQuery.)
Public methodToString()()()()
Prints a query to a string.
(Inherited from Query.)
Public methodToString(String)
Prints a user-readable version of this query.
(Overrides MultiTermQuery..::..ToString(String).)
Public methodWeight
Expert: Constructs and initializes a Weight for a top-level query.
(Inherited from Query.)

Fields

  NameDescription
Protected fieldrewriteMethod (Inherited from MultiTermQuery.)
Protected fieldterm (Inherited from MultiTermQuery.)

See Also