package liquibase.ext.spatial.sqlgenerator;
import liquibase.database.Database;
import liquibase.database.core.DerbyDatabase;
import liquibase.database.core.H2Database;
import liquibase.exception.ValidationErrors;
import liquibase.ext.spatial.statement.CreateSpatialIndexStatement;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.structure.core.Table;
/**
* <code>CreateSpatialIndexGeneratorGeoDB</code> generates the SQL for creating a spatial index in
* Apache Derby and H2.
*/
public class CreateSpatialIndexGeneratorGeoDB extends AbstractCreateSpatialIndexGenerator {
@Override
public boolean supports(final CreateSpatialIndexStatement statement, final Database database) {
return database instanceof DerbyDatabase || database instanceof H2Database;
}
/**
* {@inheritDoc} Also ensures that the SRID is populated.
*/
@Override
public ValidationErrors validate(final CreateSpatialIndexStatement statement,
final Database database, final SqlGeneratorChain sqlGeneratorChain) {
final ValidationErrors validationErrors = super.validate(statement, database,
sqlGeneratorChain);
validationErrors.checkRequiredField("srid", statement.getSrid());
return validationErrors;
}
/**
* @see liquibase.sqlgenerator.SqlGenerator#generateSql(liquibase.statement.SqlStatement,
* liquibase.database.Database, liquibase.sqlgenerator.SqlGeneratorChain)
*/
@Override
public Sql[] generateSql(final CreateSpatialIndexStatement statement, final Database database,
final SqlGeneratorChain sqlGeneratorChain) {
final String catalogName = statement.getTableCatalogName();
String schemaName = statement.getTableSchemaName();
if (schemaName == null) {
schemaName = database.getDefaultSchemaName();
}
final StringBuilder sql = new StringBuilder("CALL ");
sql.append(schemaName).append(".CreateSpatialIndex(");
// Add the schema name parameter.
sql.append("'").append(schemaName).append("'");
sql.append(", ");
// Add the table name parameter.
final String tableName = statement.getTableName();
sql.append("'").append(tableName).append("'");
sql.append(", ");
// Add the column name parameter.
final String columnName = statement.getColumns()[0];
sql.append("'").append(columnName).append("'");
sql.append(", ");
// Add the SRID parameter.
final int srid = statement.getSrid();
sql.append("'").append(srid).append("'");
sql.append(')');
final Table hatboxTable = new Table().setName(database.correctObjectName(tableName
+ "_HATBOX", Table.class));
hatboxTable.setSchema(catalogName, schemaName);
final UnparsedSql spatialize = new UnparsedSql(sql.toString(), hatboxTable);
return new Sql[] { spatialize };
}
}