/*
    * 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.shardingsphere.parser.rule;
  
  import lombok.Getter;
  import org.apache.shardingsphere.infra.database.core.type.DatabaseType;
  import org.apache.shardingsphere.infra.parser.SQLParserEngine;
  import org.apache.shardingsphere.infra.parser.ShardingSphereSQLParserEngine;
  import org.apache.shardingsphere.infra.parser.SimpleSQLParserEngine;
  import org.apache.shardingsphere.infra.rule.attribute.RuleAttributes;
  import org.apache.shardingsphere.infra.rule.scope.GlobalRule;
  import org.apache.shardingsphere.parser.config.SQLParserRuleConfiguration;
  import org.apache.shardingsphere.sql.parser.api.CacheOption;
  
  /**
   * SQL parser rule.
   */
  @Getter
  public final class SQLParserRule implements GlobalRule {
      
      private final SQLParserRuleConfiguration configuration;
      
      private final CacheOption sqlStatementCache;
      
      private final CacheOption parseTreeCache;
      
      private final String engineType;
      
      public SQLParserRule(final SQLParserRuleConfiguration ruleConfig) {
          configuration = ruleConfig;
          sqlStatementCache = ruleConfig.getSqlStatementCache();
          parseTreeCache = ruleConfig.getParseTreeCache();
          engineType = "Standard";
      }
      
      /**
       * Get SQL parser engine.
       * 
       * @param databaseType database type
       * @return SQL parser engine
       */
      public SQLParserEngine getSQLParserEngine(final DatabaseType databaseType) {
          return "Standard".equals(engineType)
                  ? new ShardingSphereSQLParserEngine(databaseType, sqlStatementCache, parseTreeCache)
                  : new SimpleSQLParserEngine();
      }
      
      @Override
      public RuleAttributes getAttributes() {
          return new RuleAttributes();
      }
  }