org.elasticsearch.search.suggest.completion.CompletionSuggestionContext Maven / Gradle / Ivy
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.suggest.completion;
import org.apache.lucene.search.suggest.document.CompletionQuery;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.unit.Fuzziness;
import org.elasticsearch.index.mapper.CompletionFieldMapper;
import org.elasticsearch.index.query.SearchExecutionContext;
import org.elasticsearch.search.suggest.SuggestionSearchContext;
import org.elasticsearch.search.suggest.completion.context.ContextMapping;
import org.elasticsearch.search.suggest.completion.context.ContextMappings;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class CompletionSuggestionContext extends SuggestionSearchContext.SuggestionContext {
protected CompletionSuggestionContext(SearchExecutionContext searchExecutionContext) {
super(CompletionSuggester.INSTANCE, searchExecutionContext);
}
private CompletionFieldMapper.CompletionFieldType fieldType;
private FuzzyOptions fuzzyOptions;
private RegexOptions regexOptions;
private boolean skipDuplicates;
private Map> queryContexts = Collections.emptyMap();
CompletionFieldMapper.CompletionFieldType getFieldType() {
return this.fieldType;
}
void setFieldType(CompletionFieldMapper.CompletionFieldType fieldType) {
this.fieldType = fieldType;
}
void setRegexOptions(RegexOptions regexOptions) {
this.regexOptions = regexOptions;
}
void setFuzzyOptions(FuzzyOptions fuzzyOptions) {
this.fuzzyOptions = fuzzyOptions;
}
void setQueryContexts(Map> queryContexts) {
this.queryContexts = queryContexts;
}
void setSkipDuplicates(boolean skipDuplicates) {
this.skipDuplicates = skipDuplicates;
}
public FuzzyOptions getFuzzyOptions() {
return fuzzyOptions;
}
public RegexOptions getRegexOptions() {
return regexOptions;
}
public Map> getQueryContexts() {
return queryContexts;
}
public boolean isSkipDuplicates() {
return skipDuplicates;
}
CompletionQuery toQuery() {
CompletionFieldMapper.CompletionFieldType fieldType = getFieldType();
final CompletionQuery query;
if (getPrefix() != null) {
query = createCompletionQuery(getPrefix(), fieldType);
} else if (getRegex() != null) {
if (fuzzyOptions != null) {
throw new IllegalArgumentException("can not use 'fuzzy' options with 'regex");
}
if (regexOptions == null) {
regexOptions = RegexOptions.builder().build();
}
query = fieldType.regexpQuery(getRegex(), regexOptions.getFlagsValue(), regexOptions.getMaxDeterminizedStates());
} else if (getText() != null) {
query = createCompletionQuery(getText(), fieldType);
} else {
throw new IllegalArgumentException("'prefix/text' or 'regex' must be defined");
}
if (fieldType.hasContextMappings()) {
ContextMappings contextMappings = fieldType.getContextMappings();
return contextMappings.toContextQuery(query, queryContexts);
}
return query;
}
private CompletionQuery createCompletionQuery(BytesRef prefix, CompletionFieldMapper.CompletionFieldType fieldType) {
final CompletionQuery query;
if (fuzzyOptions != null) {
query = fieldType.fuzzyQuery(
prefix.utf8ToString(),
Fuzziness.fromEdits(fuzzyOptions.getEditDistance()),
fuzzyOptions.getFuzzyPrefixLength(),
fuzzyOptions.getFuzzyMinLength(),
fuzzyOptions.getMaxDeterminizedStates(),
fuzzyOptions.isTranspositions(),
fuzzyOptions.isUnicodeAware()
);
} else {
query = fieldType.prefixQuery(prefix);
}
return query;
}
}