package liquibase.integration.ant;

 import liquibase.Liquibase;

 import org.apache.tools.ant.BuildException;

 import java.io.Writer;

 /**

  * Ant task for rolling back a database.

  */

 public class DatabaseRollbackFutureTask extends BaseLiquibaseTask {

     @Override

     public void execute() throws BuildException {

         super.execute();

         Liquibase liquibase = null;

         try {

             Writer writer = createOutputWriter();

             if (writer == null) {

                 throw new BuildException("rollbackFutureDatabase requires outputFile to be set");

             }

             liquibase = createLiquibase();

             liquibase.futureRollbackSQL(getContexts(), writer);

             writer.flush();

             writer.close();

         } catch (Exception e) {

             throw new BuildException(e);

         } finally {

             closeDatabase(liquibase);

         }

     }

 }