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Re: Entity hashCode and equals overriding
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created by <a href="https://community.jboss.org/people/fabiovalse">fabio valsecchi</a> in <i>EJB3 Development</i> - <a href="https://community.jboss.org/message/787911#787911">View the full discussion</a>
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<div class="jive-rendered-content"><p> The cart variable is inside the CartBean:</p><p>-----------------------------------------------------------------------</p><p class="p1">@Stateful</p><p class="p2"><span class="s1">@Remote</span>(ICart.<span class="s2">class</span>)</p><p class="p3">public<span class="s3"> </span>class<span class="s3"> CartBean </span>implements<span class="s3"> ICart {</span></p><p class="p2">          <span class="s1">@PersistenceContext</span>(unitName = <span class="s4">"JPABOOK"</span>, type=PersistenceContextType.<span class="s5">EXTENDED</span>)</p><p class="p2">    EntityManager <span class="s5">entityManager</span>;</p><p class="p2">          <span class="s2">private</span> Cart <span class="s5">cart</span> = <span class="s2">null</span>;</p><p class="p4">  </p><p class="p2">    <span class="s2">public</span> CartBean() {}</p><p class="p4">    </p><p class="p1"><span class="s3">    </span>@Override</p><p class="p2">    <span class="s2">public</span> <span class="s2">void</span> create(String username) {</p><p class="p2">              <span class="s5">cart</span> = <span class="s5">entityManager</span>.find(Cart.<span class="s2">class</span>, username);</p><p class="p4">     </p><p class="p2">        <span class="s2">if</span> (<span class="s5">cart</span> == <span class="s2">null</span>) {</p><p class="p2">                  <span class="s5">cart</span> = <span class="s2">new</span> Cart();</p><p class="p2">                  <span class="s5">cart</span>.setUsername(username);</p><p class="p2">                  <span class="s5">cart</span>.setBill(0);</p><p class="p2">                  <span class="s5">entityManager</span>.persist(<span class="s5">cart</span>);</p><p class="p2">        }</p><p class="p2">    }</p><p class="p1"><span class="s3">    </span>@Override</p><p class="p2">    <span class="s2">public</span> <span class="s2">void</span> addArticle(Book book, Integer quantity) {</p><p class="p2">              Integer currentQuantity = <span class="s5">cart</span>.getArticles().get(book);</p><p class="p4">    </p><p class="p2">              System.<span class="s5">out</span>.println(currentQuantity);</p><p class="p4">     </p><p class="p2">        <span class="s2">if</span> (currentQuantity == <span class="s2">null</span>) {</p><p class="p2">                  currentQuantity = 0;</p><p class="p2">        }</p><p class="p2">        currentQuantity += quantity;</p><p class="p2">        <span class="s5">cart</span>.getArticles().put(book, currentQuantity);</p><p class="p2">    }</p><p>-----------------------------------------------------------------------</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The cart it could be empty or containg some entries.</p></div>
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