[jboss-dev-forums] [EJB3 Development] - Re: Entity hashCode and equals overriding

[Piotr Nowicki]

Piotr Nowicki [https://community.jboss.org/people/pedrokowalski] created the discussion

"Re: Entity hashCode and equals overriding"

To view the discussion, visit: https://community.jboss.org/message/787914#787914

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If you invoke addArticle(-) for the first time - the cart.getArtiles() is empty.

If you invoke addArticle(-) again - the cart.getArticles().get(book) will return null, but *will the cart.getArticles() be empty?* Try debugging it - is the previous article in the map (then you have a problem with hashCode and/or equals) or it's not there (and you have a problem with persistence).
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