You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.2 KiB
43 lines
1.2 KiB
/*
|
|
* SD2x Homework #8
|
|
* This class represents the Logic Tier in the three-tier architecture.
|
|
* Implement the appropriate methods for this tier below.
|
|
*/
|
|
import java.util.List;
|
|
import java.util.LinkedList;
|
|
|
|
import java.util.Set;
|
|
|
|
public class LogicTier {
|
|
|
|
private DataTier dataTier; // link to the Data Tier
|
|
|
|
public LogicTier(DataTier dataTier) {
|
|
this.dataTier = dataTier;
|
|
}
|
|
private boolean includes(String author, String search){
|
|
for(int i=0; i <= author.length() - search.length(); i++){
|
|
if(author.substring(i, i + search.length()).equals(search)) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public List<String> findBookTitlesByAuthor(String author){
|
|
Set<Book> books = dataTier.getAllBooks();
|
|
List<String> matchingTitles = new LinkedList<String>();
|
|
for(Book b : books){
|
|
if(includes(b.getAuthor(), author)) matchingTitles.add(b.getTitle());
|
|
}
|
|
return matchingTitles;
|
|
}
|
|
|
|
public long findNumberOfBooksInYear(int year){
|
|
int bookNum = 0;
|
|
Set<Book> books = dataTier.getAllBooks();
|
|
for(Book b : books){
|
|
if(b.getPublicationYear() == year) bookNum += 1;
|
|
}
|
|
return bookNum;
|
|
}
|
|
|
|
}
|