/**
* Finishes configuring the CustomChange based on the values passed to {@link #setParam(String,
* String)} then calls {@link CustomSqlChange#generateStatements(liquibase.database.Database)} or
* {@link CustomTaskChange#execute(liquibase.database.Database)} depending on the CustomChange
* implementation.
*
* <p>If the CustomChange returns a null SqlStatement array, this method returns an empty array.
* If a CustomTaskChange is being used, this method will return an empty array.
*/
@Override
public SqlStatement[] generateStatements(Database database) {
SqlStatement[] statements = null;
try {
configureCustomChange();
if (customChange instanceof CustomSqlChange) {
statements = ((CustomSqlChange) customChange).generateStatements(database);
} else if (customChange instanceof CustomTaskChange) {
((CustomTaskChange) customChange).execute(database);
} else {
throw new UnexpectedLiquibaseException(
customChange.getClass().getName()
+ " does not implement "
+ CustomSqlChange.class.getName()
+ " or "
+ CustomTaskChange.class.getName());
}
} catch (CustomChangeException e) {
throw new UnexpectedLiquibaseException(e);
}
if (statements == null) {
statements = new SqlStatement[0];
}
return statements;
}
/**
* Finishes configuring the CustomChange based on the values passed to {@link #setParam(String,
* String)} then calls {@link
* CustomSqlRollback#generateRollbackStatements(liquibase.database.Database)} or {@link
* CustomTaskRollback#rollback(liquibase.database.Database)} depending on the CustomChange
* implementation.
*
* <p>If the CustomChange returns a null SqlStatement array, this method returns an empty array.
* If a CustomTaskChange is being used, this method will return an empty array. Any {@link
* RollbackImpossibleException} exceptions thrown by the CustomChange will thrown by this method.
*/
@Override
public SqlStatement[] generateRollbackStatements(Database database)
throws RollbackImpossibleException {
SqlStatement[] statements = null;
try {
configureCustomChange();
if (customChange instanceof CustomSqlRollback) {
statements = ((CustomSqlRollback) customChange).generateRollbackStatements(database);
} else if (customChange instanceof CustomTaskRollback) {
((CustomTaskRollback) customChange).rollback(database);
} else {
throw new RollbackImpossibleException(
"Unknown rollback type: " + customChange.getClass().getName());
}
} catch (CustomChangeException e) {
throw new UnexpectedLiquibaseException(e);
}
if (statements == null) {
statements = new SqlStatement[0];
}
return statements;
}