package org.liquibase.maven.plugins;

 import liquibase.exception.LiquibaseException;

 import liquibase.Liquibase;

 /**

  * Liquibase Update Maven plugin. This plugin allows for DatabaseChangeLogs to be applied to a database as part of a

  * Maven build process.

  * 

  * @author Peter Murray

  * @description Liquibase Update Maven plugin

  */

 public abstract class AbstractLiquibaseUpdateMojo extends AbstractLiquibaseChangeLogMojo {

     /**

      * The number of changes to apply to the database. By default this value is 0, which will result in all changes (not

      * already applied to the database) being applied.

      * 

      * @parameter expression="${liquibase.changesToApply}" default-value=0

      */

     protected int changesToApply;

     @Override

     protected void performLiquibaseTask(Liquibase liquibase) throws LiquibaseException {

         super.performLiquibaseTask(liquibase);

         doUpdate(liquibase);

     }

     /**

      * Performs the actual "update" work on the database.

      * 

      * @param liquibase

      *            The Liquibase object to use to perform the "update".

      */

     protected abstract void doUpdate(Liquibase liquibase) throws LiquibaseException;

     @Override

     protected void printSettings(String indent) {

         super.printSettings(indent);

         getLog().info(indent + "number of changes to apply: " + changesToApply);

     }

 }