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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.shardingsphere.sqlfederation.optimizer.context;
19  
20  import lombok.AccessLevel;
21  import lombok.NoArgsConstructor;
22  import org.apache.shardingsphere.infra.config.props.ConfigurationProperties;
23  import org.apache.shardingsphere.infra.metadata.database.ShardingSphereDatabase;
24  import org.apache.shardingsphere.parser.rule.SQLParserRule;
25  import org.apache.shardingsphere.parser.rule.builder.DefaultSQLParserRuleConfigurationBuilder;
26  import org.apache.shardingsphere.parser.rule.builder.SQLParserRuleBuilder;
27  import org.apache.shardingsphere.sqlfederation.optimizer.context.parser.OptimizerParserContext;
28  import org.apache.shardingsphere.sqlfederation.optimizer.context.parser.OptimizerParserContextFactory;
29  import org.apache.shardingsphere.sqlfederation.optimizer.context.planner.OptimizerMetaData;
30  import org.apache.shardingsphere.sqlfederation.optimizer.context.planner.OptimizerMetaDataFactory;
31  
32  import java.util.Map;
33  import java.util.Properties;
34  
35  /**
36   * Optimizer context factory.
37   */
38  @NoArgsConstructor(access = AccessLevel.PRIVATE)
39  public final class OptimizerContextFactory {
40      
41      /**
42       * Create optimize context.
43       *
44       * @param databases databases
45       * @return created optimizer context
46       */
47      public static OptimizerContext create(final Map<String, ShardingSphereDatabase> databases) {
48          Map<String, OptimizerParserContext> parserContexts = OptimizerParserContextFactory.create(databases);
49          // TODO consider to use sqlParserRule in global rule
50          SQLParserRule sqlParserRule = new SQLParserRuleBuilder().build(new DefaultSQLParserRuleConfigurationBuilder().build(), databases, new ConfigurationProperties(new Properties()));
51          Map<String, OptimizerMetaData> optimizerMetaData = OptimizerMetaDataFactory.create(databases);
52          return new OptimizerContext(sqlParserRule, parserContexts, optimizerMetaData);
53      }
54  }