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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.data.pipeline.core.sqlbuilder.sql;
19  
20  import org.apache.shardingsphere.data.pipeline.core.sqlbuilder.dialect.DialectPipelineSQLBuilder;
21  import org.apache.shardingsphere.data.pipeline.core.sqlbuilder.segment.PipelineSQLSegmentBuilder;
22  import org.apache.shardingsphere.database.connector.core.spi.DatabaseTypedSPILoader;
23  import org.apache.shardingsphere.database.connector.core.type.DatabaseType;
24  import org.apache.shardingsphere.infra.metadata.database.schema.QualifiedTable;
25  
26  import java.util.Optional;
27  
28  /**
29   * Pipeline data consistency calculate SQL builder.
30   */
31  public final class PipelineDataConsistencyCalculateSQLBuilder {
32      
33      private final DialectPipelineSQLBuilder dialectSQLBuilder;
34      
35      private final PipelineSQLSegmentBuilder sqlSegmentBuilder;
36      
37      public PipelineDataConsistencyCalculateSQLBuilder(final DatabaseType databaseType) {
38          dialectSQLBuilder = DatabaseTypedSPILoader.getService(DialectPipelineSQLBuilder.class, databaseType);
39          sqlSegmentBuilder = new PipelineSQLSegmentBuilder(databaseType);
40      }
41      
42      /**
43       * Build CRC32 SQL.
44       *
45       * @param qualifiedTable qualified table
46       * @param columnName column name
47       * @return built SQL
48       */
49      public Optional<String> buildCRC32SQL(final QualifiedTable qualifiedTable, final String columnName) {
50          return dialectSQLBuilder.buildCRC32SQL(
51                  sqlSegmentBuilder.getQualifiedTableName(qualifiedTable), sqlSegmentBuilder.getEscapedIdentifier(columnName));
52      }
53  }