Package eu.kartoffelquadrat.bookstoreinternals

Class CommentsImpl

java.lang.Object

eu.kartoffelquadrat.bookstoreinternals.CommentsImpl

All Implemented Interfaces:

Comments

public class CommentsImpl
extends Object
implements Comments

Full implementation Implementation of the Comments interface.

Author:

Maximilian Schiedermeier

Method Summary

Modifier and Type	Method	Description
void	addComment(long isbn, String comment)	Add a comment to an existing book.
void	deleteComment(long isbn, long commentId)	Removes a previously stored comment for a specific book.
void	editComment(long isbn, long commentId, String updatedComment)	Overwrites an already existing specific comment for a specific book.
Map<Long,String>	getAllCommentsForBook(long isbn)	Returns all comments stored for a specific book.
static Comments	getInstance()	Singleton access for CommentsImpl.
void	removeAllCommentsForBook(long isbn)	Removes all previously stored comments for a specific book.
String	toString()	Helper method to convert all stored comments into human readable format.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

getInstance

public static Comments getInstance()

Singleton access for CommentsImpl.

Returns:

the one ond only CommentsImpl instance.

getAllCommentsForBook

public Map<Long,String> getAllCommentsForBook(long isbn)

Returns all comments stored for a specific book.

Specified by:

getAllCommentsForBook in interface Comments

Parameters:

isbn - as the identifier of the book in question

Returns:

a map of commentIds to comments.

addComment

public void addComment(long isbn,
                       String comment)

Add a comment to an existing book. Comments for non-indexed books (isbn not listed in assortmentMap) are rejected.

Specified by:

addComment in interface Comments

Parameters:

isbn - as the identifier of the book in question

comment - as a string representing the comment to be added

deleteComment

public void deleteComment(long isbn,
                          long commentId)

Removes a previously stored comment for a specific book.

Specified by:

deleteComment in interface Comments

Parameters:

isbn - as the identifier of the book in question

commentId - as the id of the comment to be removed

removeAllCommentsForBook

public void removeAllCommentsForBook(long isbn)

Removes all previously stored comments for a specific book.

Specified by:

removeAllCommentsForBook in interface Comments

Parameters:

isbn - as the identifier of the book in question

editComment

public void editComment(long isbn,
                        long commentId,
                        String updatedComment)

Overwrites an already existing specific comment for a specific book.

Specified by:

editComment in interface Comments

Parameters:

isbn - as the identifier of the book in question

commentId - as the id of the comment to be overwritten

updatedComment - as a string representing the updated comment

toString

public String toString()

Helper method to convert all stored comments into human readable format.

Overrides:

toString in class Object

Returns:

A nicely formatted string listing all comments for all books.