Podsumowanie wzorców projektowych GoF

System.out.println("interpreting show title for actor : " +dvdInterpreterClient.interpret("show title for actor "));}}Klasy wzorca:TitleAndActorpackage pk.dydakt.to.dp.b.gof.interpreter;public class TitleAndActor {private String title;private String actor;public TitleAndActor(String title, String actor) {this.title = title;this.actor = actor;}public String getTitle() {return this.title;}public String getActor() {return this.actor;}}DvdInterpreterClientpackage pk.dydakt.to.dp.b.gof.interpreter;import java.util.StringTokenizer;public class DvdInterpreterClient {DvdInterpreterContext dvdInterpreterContext;public DvdInterpreterClient(DvdInterpreterContext dvdInterpreterContext) {this.dvdInterpreterContext = dvdInterpreterContext;}// expression syntax:// show title | actor [for actor | title ]public String interpret(String expression) {StringBuffer result = new StringBuffer("Query Result: ");String currentToken;StringTokenizer expressionTokens =new StringTokenizer(expression);char mainQuery = ' ';char subQuery = ' ';boolean forUsed = false;String searchString = null;boolean searchStarted = false;boolean searchEnded = false;while (expressionTokens.hasMoreTokens()){currentToken = expressionTokens.nextToken();if (currentToken.equals("show")) {continue;//show in all queries, not really used} else if (currentToken.equals("title")) {if (mainQuery == ' ') {83