package liquibase.sqlgenerator.core;
import liquibase.change.ColumnConfig;
import liquibase.database.Database;
import liquibase.database.core.SQLiteDatabase;
import liquibase.database.structure.Index;
import liquibase.exception.DatabaseException;
import liquibase.exception.UnexpectedLiquibaseException;
import liquibase.exception.UnsupportedChangeException;
import liquibase.sql.Sql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.sqlgenerator.SqlGeneratorFactory;
import liquibase.statement.SqlStatement;
import liquibase.statement.core.AddAutoIncrementStatement;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* SQLite does not support this ALTER TABLE operation until now.
* For more information see: http://www.sqlite.org/omitted.html.
* This is a small work around...
*/
public class AddAutoIncrementGeneratorSQLite extends AddAutoIncrementGenerator {
@Override
public int getPriority() {
return PRIORITY_DATABASE;
}
@Override
public boolean supports(AddAutoIncrementStatement statement, Database database) {
return database instanceof SQLiteDatabase;
}
@Override
public Sql[] generateSql(final AddAutoIncrementStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
List<Sql> statements = new ArrayList<Sql>();
// define alter table logic
SQLiteDatabase.AlterTableVisitor rename_alter_visitor = new SQLiteDatabase.AlterTableVisitor() {
public ColumnConfig[] getColumnsToAdd() {
return new ColumnConfig[0];
}
public boolean copyThisColumn(ColumnConfig column) {
return true;
}
public boolean createThisColumn(ColumnConfig column) {
if (column.getName().equals(statement.getColumnName())) {
column.setAutoIncrement(true);
column.setType("INTEGER");
}
return true;
}
public boolean createThisIndex(Index index) {
return true;
}
};
try {
// alter table
for (SqlStatement generatedStatement : SQLiteDatabase.getAlterTableStatements(rename_alter_visitor,database, statement.getSchemaName(), statement.getTableName())) {
statements.addAll(Arrays.asList(SqlGeneratorFactory.getInstance().generateSql(generatedStatement, database)));
}
} catch (DatabaseException e) {
e.printStackTrace();
} catch (UnsupportedChangeException e) {
throw new UnexpectedLiquibaseException(e);
}
return statements.toArray(new Sql[statements.size()]);
}
}