package liquibase.precondition;

 import java.util.ArrayList;

 import java.util.List;

 /**

  * Marker interface for precondition logic tags (and,or, not)

  */

 public abstract class PreconditionLogic implements Precondition {

     private List<Precondition> nestedPreconditions = new ArrayList<Precondition>();

     public List<Precondition> getNestedPreconditions() {

         return this.nestedPreconditions;

     }

     public void addNestedPrecondition(Precondition precondition) {

         nestedPreconditions.add(precondition);

     }

 }