gate.mimir.search.query

Interface QueryNode

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbstractOverlapQuery, AndQuery, AnnotationQuery, ConstQuery, ContainsQuery, GapQuery, MinusQuery, OrQuery, RepeatsQuery, SequenceQuery, TermQuery, WithinQuery

public interface QueryNode
extends Serializable

Top level interface for all types of query nodes. A query object specifies a set of restrictions that need to be matched against the index. In the simplest case, this comprises a term and an index name. More complex queries are usually constructed by combining simpler ones.

Method Summary

Modifier and Type	Method and Description
QueryExecutor	getQueryExecutor(QueryEngine engine) Obtains a QueryExecutor appropriate for this query node.

Method Detail

getQueryExecutor

QueryExecutor getQueryExecutor(QueryEngine engine)
                        throws IOException

Obtains a QueryExecutor appropriate for this query node. Each call to this method will return a new QueryExecutor.

Parameters:

indexes - the indexes to be searched, represented as a map from index name to index.

Returns:

an appropriate QueryExecutor.

Throws:

IOException - if the index files cannot be accessed.