code: /*
   * 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.skywalking.oap.server.storage.plugin.elasticsearch.base;
  
  import com.google.gson.Gson;
  import com.google.gson.annotations.SerializedName;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Objects;
  import lombok.Getter;
  import lombok.Setter;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.oap.server.core.storage.StorageException;
  import org.apache.skywalking.oap.server.core.storage.annotation.ElasticSearch;
  import org.apache.skywalking.oap.server.storage.plugin.elasticsearch.StorageModuleElasticsearchConfig;
  
  @Getter
  @Setter
  @Slf4j
  public class AnalyzerSetting {
      /**
       * A built-in or customised tokenizer.
       */
      private Map<String, Object> tokenizer = new HashMap<>();
      /**
       * An optional array of built-in or customised character filters.
       */
      @SerializedName("char_filter")
      private Map<String, Object> charFilter = new HashMap<>();
      /**
       * An optional array of built-in or customised token filters.
       */
      private Map<String, Object> filter = new HashMap<>();
      /**
       * The custom analyzers.
       */
      private Map<String, Object> analyzer = new HashMap<>();
  
      public void combine(AnalyzerSetting analyzerSetting) {
          this.analyzer.putAll(analyzerSetting.getAnalyzer());
          this.tokenizer.putAll(analyzerSetting.tokenizer);
          this.filter.putAll(analyzerSetting.filter);
          this.charFilter.putAll(analyzerSetting.charFilter);
      }
  
      @Override
      public boolean equals(final Object o) {
          if (this == o)
              return true;
          if (!(o instanceof AnalyzerSetting))
              return false;
          final AnalyzerSetting that = (AnalyzerSetting) o;
          return getTokenizer().equals(that.getTokenizer()) &&
              getCharFilter().equals(that.getCharFilter()) &&
              getFilter().equals(that.getFilter()) &&
              getAnalyzer().equals(that.getAnalyzer());
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(getTokenizer(), getCharFilter(), getFilter(), getAnalyzer());
      }
  
      public enum Generator {
          OAP_ANALYZER_SETTING_GENERATOR(
              ElasticSearch.MatchQuery.AnalyzerType.OAP_ANALYZER,
              config -> new Gson().fromJson(config.getOapAnalyzer(), AnalyzerSetting.class)
          ),
          OAP_LOG_ANALYZER_SETTING_GENERATOR(
              ElasticSearch.MatchQuery.AnalyzerType.OAP_LOG_ANALYZER,
              config -> new Gson().fromJson(config.getOapLogAnalyzer(), AnalyzerSetting.class)
          );
  
          private final ElasticSearch.MatchQuery.AnalyzerType type;
          private final GenerateAnalyzerSettingFunc func;
  
          Generator(final ElasticSearch.MatchQuery.AnalyzerType type,
                    final GenerateAnalyzerSettingFunc func) {
              this.type = type;
              this.func = func;
          }
  
          public GenerateAnalyzerSettingFunc getGenerateFunc() {
              return this.func;
          }
  
          public static Generator getGenerator(ElasticSearch.MatchQuery.AnalyzerType type) throws StorageException {
              for (final Generator value : Generator.values()) {
                  if (value.type == type) {
                      return value;
                  }
              }
              throw new StorageException("cannot found the AnalyzerSettingGenerator for the " + type.getName() + " type");
          }
      }
  
      @FunctionalInterface
      public interface GenerateAnalyzerSettingFunc {
          AnalyzerSetting generate(StorageModuleElasticsearchConfig config);
      }
  }
  
  
  