package liquibase.ext.spatial.sqlgenerator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import liquibase.database.Database;
import liquibase.database.core.OracleDatabase;
import liquibase.exception.ValidationErrors;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.sqlgenerator.core.AbstractSqlGenerator;
import liquibase.statement.core.DropTableStatement;
import liquibase.structure.core.Table;
import liquibase.structure.core.View;
/**
* <code>DropSpatialTableGeneratorOracle</code> generates the SQL statement for cleaning up any
* metadata prior to dropping the table.
*/
public class DropSpatialTableGeneratorOracle extends AbstractSqlGenerator<DropTableStatement> {
@Override
public boolean supports(final DropTableStatement statement, final Database database) {
return database instanceof OracleDatabase;
}
@Override
public int getPriority() {
return super.getPriority() + 1;
}
@Override
public ValidationErrors validate(final DropTableStatement statement, final Database database,
final SqlGeneratorChain sqlGeneratorChain) {
return sqlGeneratorChain.validate(statement, database);
}
@Override
public Sql[] generateSql(final DropTableStatement statement, final Database database,
final SqlGeneratorChain sqlGeneratorChain) {
final StringBuilder sql = new StringBuilder();
sql.append("DELETE FROM user_sdo_geom_metadata ");
sql.append("WHERE table_name = '").append(
database.correctObjectName(statement.getTableName(), Table.class));
sql.append("'");
final UnparsedSql deleteMetadata = new UnparsedSql(sql.toString(),
new View().setName("user_sdo_geom_metadata"));
// First delete the record then perform the standard behavior.
final List<Sql> list = new ArrayList<Sql>();
list.add(deleteMetadata);
list.addAll(Arrays.asList(sqlGeneratorChain.generateSql(statement, database)));
return list.toArray(new Sql[list.size()]);
}
}