| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.rya.indexing.external.matching; |
| |
| import java.util.List; |
| |
| import org.eclipse.rdf4j.query.algebra.QueryModelNode; |
| |
| /** |
| * Class used for determining an optimal query plan. It assigns a score |
| * between 0 and 1 to a list of QueryModelNodes. A lower score indicates |
| * that the List represents a better collection of nodes for building a query |
| * plan. Usually, the specified List is compared to a base List (original query), |
| * and the specified List (mutated query) is compared to the original to determine |
| * if there was any improvement in the query plan. This is meant to be used in conjunction |
| * with the method {@link ExternalSetMatcher#match(java.util.Iterator, com.google.common.base.Optional)}. |
| * |
| */ |
| public interface QueryNodeListRater { |
| |
| public double rateQuerySegment(List<QueryModelNode> eNodes); |
| |
| } |
