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18 package org.apache.shardingsphere.single.route.engine;
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20 import lombok.AccessLevel;
21 import lombok.NoArgsConstructor;
22 import org.apache.shardingsphere.infra.metadata.database.schema.QualifiedTable;
23 import org.apache.shardingsphere.sql.parser.sql.common.statement.SQLStatement;
24 import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.AlterSchemaStatement;
25 import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.CreateSchemaStatement;
26 import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.DropSchemaStatement;
27
28 import java.util.Collection;
29 import java.util.Optional;
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34 @NoArgsConstructor(access = AccessLevel.PRIVATE)
35 public final class SingleRouteEngineFactory {
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44 public static Optional<SingleRouteEngine> newInstance(final Collection<QualifiedTable> singleTables, final SQLStatement sqlStatement) {
45 if (!singleTables.isEmpty()) {
46 return Optional.of(new SingleStandardRouteEngine(singleTables, sqlStatement));
47 }
48
49 if (isSchemaDDLStatement(sqlStatement)) {
50 return Optional.of(new SingleDatabaseBroadcastRouteEngine());
51 }
52 return Optional.empty();
53 }
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55 private static boolean isSchemaDDLStatement(final SQLStatement sqlStatement) {
56 return sqlStatement instanceof CreateSchemaStatement || sqlStatement instanceof AlterSchemaStatement || sqlStatement instanceof DropSchemaStatement;
57 }
58 }