| /* |
| * 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.lucene.search.spans; |
| |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.index.TermStates; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.ScoreMode; |
| |
| /** Base class for span-based queries. */ |
| public abstract class SpanQuery extends Query { |
| |
| /** |
| * Returns the name of the field matched by this query. |
| */ |
| public abstract String getField(); |
| |
| @Override |
| public abstract SpanWeight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException; |
| |
| /** |
| * Build a map of terms to {@link TermStates}, for use in constructing SpanWeights |
| * @lucene.internal |
| */ |
| public static Map<Term, TermStates> getTermStates(SpanWeight... weights) { |
| Map<Term, TermStates> terms = new TreeMap<>(); |
| for (SpanWeight w : weights) { |
| w.extractTermStates(terms); |
| } |
| return terms; |
| } |
| |
| /** |
| * Build a map of terms to {@link TermStates}, for use in constructing SpanWeights |
| * @lucene.internal |
| */ |
| public static Map<Term, TermStates> getTermStates(Collection<SpanWeight> weights) { |
| Map<Term, TermStates> terms = new TreeMap<>(); |
| for (SpanWeight w : weights) { |
| w.extractTermStates(terms); |
| } |
| return terms; |
| } |
| } |