querqy.rewrite.QueryRewriter Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of querqy-core Show documentation

Querqy library for query rewriting: Querqy Core

There is a newer version: 3.18.1

/**
 * 
 */
package querqy.rewrite;

import java.util.Collections;
import java.util.Set;

import querqy.model.ExpandedQuery;
import querqy.model.Term;

/**
 * A query rewriter.
 * Query rewriter implementations shall guarantee to preserve the number of top-level query clauses of the
 * {@link ExpandedQuery#userQuery} when rewriting the query.
 * 
 * @author rene
 *
 */
public interface QueryRewriter {
    
    Set EMPTY_GENERABLE_TERMS = Collections.emptySet();

    ExpandedQuery rewrite(ExpandedQuery query);

}