Hands-On Design Patterns with Java

Director class

The RoasterDirector class creates a Builder instance and then uses a sequence of steps to build the roaster. The RoasterDirector class is unaware of whether the roaster being created is for personal or commercial use:

public class RoasterDirector {    Builder currentBuilder;    // roaster building steps    public void buildRoaster(Builder builder) {        currentBuilder = builder;        currentBuilder.buildCoolingTray();        currentBuilder.buildExhaustSystem();        currentBuilder.buildGasBurner();        currentBuilder.buildInnerDrum();        currentBuilder.buildMainBody();        currentBuilder.buildMotor();        currentBuilder.buildPlatform();        currentBuilder.buildThermocouples();    }}

The order of the steps in the build process is not important.