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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.suggest;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.util.CharsRefBuilder;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.index.query.QueryParseContext;
import java.io.IOException;
public abstract class Suggester<T extends SuggestionSearchContext.SuggestionContext> implements Writeable.Reader<SuggestionBuilder<?>> {
protected abstract Suggest.Suggestion<? extends Suggest.Suggestion.Entry<? extends Suggest.Suggestion.Entry.Option>>
innerExecute(String name, T suggestion, IndexSearcher searcher, CharsRefBuilder spare) throws IOException;
/**
* Read the SuggestionBuilder paired with this Suggester XContent.
*/
public abstract SuggestionBuilder<?> innerFromXContent(QueryParseContext context) throws IOException;
public Suggest.Suggestion<? extends Suggest.Suggestion.Entry<? extends Suggest.Suggestion.Entry.Option>>
execute(String name, T suggestion, IndexSearcher searcher, CharsRefBuilder spare) throws IOException {
// #3469 We want to ignore empty shards
if (searcher.getIndexReader().numDocs() == 0) {
return null;
}
return innerExecute(name, suggestion, searcher, spare);
}
}
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