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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.index.analysis;
import org.apache.lucene.analysis.Analyzer;
import org.elasticsearch.Version;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.AbstractIndexComponent;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.index.mapper.core.StringFieldMapper;
import java.io.Closeable;
import java.util.HashMap;
import java.util.Map;
import static java.util.Collections.unmodifiableMap;
/**
*
*/
public class AnalysisService extends AbstractIndexComponent implements Closeable {
private final Map<String, NamedAnalyzer> analyzers;
private final Map<String, TokenizerFactory> tokenizers;
private final Map<String, CharFilterFactory> charFilters;
private final Map<String, TokenFilterFactory> tokenFilters;
private final NamedAnalyzer defaultIndexAnalyzer;
private final NamedAnalyzer defaultSearchAnalyzer;
private final NamedAnalyzer defaultSearchQuoteAnalyzer;
public AnalysisService(IndexSettings indexSettings,
Map<String, AnalyzerProvider> analyzerProviders,
Map<String, TokenizerFactory> tokenizerFactoryFactories,
Map<String, CharFilterFactory> charFilterFactoryFactories,
Map<String, TokenFilterFactory> tokenFilterFactoryFactories) {
super(indexSettings);
this.tokenizers = unmodifiableMap(tokenizerFactoryFactories);
this.charFilters = unmodifiableMap(charFilterFactoryFactories);
this.tokenFilters = unmodifiableMap(tokenFilterFactoryFactories);
analyzerProviders = new HashMap<>(analyzerProviders);
if (!analyzerProviders.containsKey("default")) {
analyzerProviders.put("default", new StandardAnalyzerProvider(indexSettings, null, "default", Settings.Builder.EMPTY_SETTINGS));
}
if (!analyzerProviders.containsKey("default_search")) {
analyzerProviders.put("default_search", analyzerProviders.get("default"));
}
if (!analyzerProviders.containsKey("default_search_quoted")) {
analyzerProviders.put("default_search_quoted", analyzerProviders.get("default_search"));
}
Map<String, NamedAnalyzer> analyzers = new HashMap<>();
for (Map.Entry<String, AnalyzerProvider> entry : analyzerProviders.entrySet()) {
AnalyzerProvider analyzerFactory = entry.getValue();
String name = entry.getKey();
/*
* Lucene defaults positionIncrementGap to 0 in all analyzers but
* Elasticsearch defaults them to 0 only before version 2.0
* and 100 afterwards so we override the positionIncrementGap if it
* doesn't match here.
*/
int overridePositionIncrementGap = StringFieldMapper.Defaults.positionIncrementGap(indexSettings.getIndexVersionCreated());
if (analyzerFactory instanceof CustomAnalyzerProvider) {
((CustomAnalyzerProvider) analyzerFactory).build(this);
/*
* Custom analyzers already default to the correct, version
* dependent positionIncrementGap and the user is be able to
* configure the positionIncrementGap directly on the analyzer so
* we disable overriding the positionIncrementGap to preserve the
* user's setting.
*/
overridePositionIncrementGap = Integer.MIN_VALUE;
}
Analyzer analyzerF = analyzerFactory.get();
if (analyzerF == null) {
throw new IllegalArgumentException("analyzer [" + analyzerFactory.name() + "] created null analyzer");
}
NamedAnalyzer analyzer;
if (analyzerF instanceof NamedAnalyzer) {
// if we got a named analyzer back, use it...
analyzer = (NamedAnalyzer) analyzerF;
if (overridePositionIncrementGap >= 0 && analyzer.getPositionIncrementGap(analyzer.name()) != overridePositionIncrementGap) {
// unless the positionIncrementGap needs to be overridden
analyzer = new NamedAnalyzer(analyzer, overridePositionIncrementGap);
}
} else {
analyzer = new NamedAnalyzer(name, analyzerFactory.scope(), analyzerF, overridePositionIncrementGap);
}
if (analyzers.containsKey(name)) {
throw new IllegalStateException("already registered analyzer with name: " + name);
}
analyzers.put(name, analyzer);
String strAliases = this.indexSettings.getSettings().get("index.analysis.analyzer." + analyzerFactory.name() + ".alias");
if (strAliases != null) {
for (String alias : Strings.commaDelimitedListToStringArray(strAliases)) {
analyzers.put(alias, analyzer);
}
}
String[] aliases = this.indexSettings.getSettings().getAsArray("index.analysis.analyzer." + analyzerFactory.name() + ".alias");
for (String alias : aliases) {
analyzers.put(alias, analyzer);
}
}
NamedAnalyzer defaultAnalyzer = analyzers.get("default");
if (defaultAnalyzer == null) {
throw new IllegalArgumentException("no default analyzer configured");
}
if (analyzers.containsKey("default_index")) {
final Version createdVersion = indexSettings.getIndexVersionCreated();
if (createdVersion.onOrAfter(Version.V_3_0_0)) {
throw new IllegalArgumentException("setting [index.analysis.analyzer.default_index] is not supported anymore, use [index.analysis.analyzer.default] instead for index [" + index().getName() + "]");
} else {
deprecationLogger.deprecated("setting [index.analysis.analyzer.default_index] is deprecated, use [index.analysis.analyzer.default] instead for index [{}]", index().getName());
}
}
defaultIndexAnalyzer = analyzers.containsKey("default_index") ? analyzers.get("default_index") : defaultAnalyzer;
defaultSearchAnalyzer = analyzers.containsKey("default_search") ? analyzers.get("default_search") : defaultAnalyzer;
defaultSearchQuoteAnalyzer = analyzers.containsKey("default_search_quote") ? analyzers.get("default_search_quote") : defaultSearchAnalyzer;
for (Map.Entry<String, NamedAnalyzer> analyzer : analyzers.entrySet()) {
if (analyzer.getKey().startsWith("_")) {
throw new IllegalArgumentException("analyzer name must not start with '_'. got \"" + analyzer.getKey() + "\"");
}
}
this.analyzers = unmodifiableMap(analyzers);
}
@Override
public void close() {
for (NamedAnalyzer analyzer : analyzers.values()) {
if (analyzer.scope() == AnalyzerScope.INDEX) {
try {
analyzer.close();
} catch (NullPointerException e) {
// because analyzers are aliased, they might be closed several times
// an NPE is thrown in this case, so ignore....
} catch (Exception e) {
logger.debug("failed to close analyzer " + analyzer);
}
}
}
}
public NamedAnalyzer analyzer(String name) {
return analyzers.get(name);
}
public NamedAnalyzer defaultIndexAnalyzer() {
return defaultIndexAnalyzer;
}
public NamedAnalyzer defaultSearchAnalyzer() {
return defaultSearchAnalyzer;
}
public NamedAnalyzer defaultSearchQuoteAnalyzer() {
return defaultSearchQuoteAnalyzer;
}
public TokenizerFactory tokenizer(String name) {
return tokenizers.get(name);
}
public CharFilterFactory charFilter(String name) {
return charFilters.get(name);
}
public TokenFilterFactory tokenFilter(String name) {
return tokenFilters.get(name);
}
}
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