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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.text.Text;
import java.io.IOException;
import java.util.Locale;
import java.util.Map;
/**
*
*/
public class CustomSuggester extends Suggester<CustomSuggester.CustomSuggestionsContext> {
// This is a pretty dumb implementation which returns the original text + fieldName + custom config option + 12 or 123
@Override
public Suggest.Suggestion<? extends Suggest.Suggestion.Entry<? extends Suggest.Suggestion.Entry.Option>> innerExecute(String name, CustomSuggestionsContext suggestion, IndexSearcher searcher, CharsRefBuilder spare) throws IOException {
// Get the suggestion context
String text = suggestion.getText().utf8ToString();
// create two suggestions with 12 and 123 appended
Suggest.Suggestion<Suggest.Suggestion.Entry<Suggest.Suggestion.Entry.Option>> response = new Suggest.Suggestion<>(name, suggestion.getSize());
String firstSuggestion = String.format(Locale.ROOT, "%s-%s-%s-%s", text, suggestion.getField(), suggestion.options.get("suffix"), "12");
Suggest.Suggestion.Entry<Suggest.Suggestion.Entry.Option> resultEntry12 = new Suggest.Suggestion.Entry<>(new Text(firstSuggestion), 0, text.length() + 2);
response.addTerm(resultEntry12);
String secondSuggestion = String.format(Locale.ROOT, "%s-%s-%s-%s", text, suggestion.getField(), suggestion.options.get("suffix"), "123");
Suggest.Suggestion.Entry<Suggest.Suggestion.Entry.Option> resultEntry123 = new Suggest.Suggestion.Entry<>(new Text(secondSuggestion), 0, text.length() + 3);
response.addTerm(resultEntry123);
return response;
}
@Override
public SuggestContextParser getContextParser() {
return (parser, mapperService, fieldData, headersContext) -> {
Map<String, Object> options = parser.map();
CustomSuggestionsContext suggestionContext = new CustomSuggestionsContext(CustomSuggester.this, options);
suggestionContext.setField((String) options.get("field"));
return suggestionContext;
};
}
public static class CustomSuggestionsContext extends SuggestionSearchContext.SuggestionContext {
public Map<String, Object> options;
public CustomSuggestionsContext(Suggester suggester, Map<String, Object> options) {
super(suggester);
this.options = options;
}
}
}
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