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PODo persistent class properties forming composite key also need to be serializable or transient in case of non-serializable?
 

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  1. PODo persistent class properties forming composite key also need to be serializable or transient in case of non-serializable?
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    <p>I have a persistent class : </p> <pre><code>public class NotifEventGroupRel implements Serializable{ private static final long serialVersionUID = 7616645672995663305L; private Long eventGroupId; private String eventName; private NotifEventGroup notifEventGroup; //// composite id property private EmailTmplt emailTmplt; // composite id property private SmsTmplt smsTmplt; // composite id property .... } </code></pre> <p>Its hbm.xml file is :</p> <pre><code>&lt;hibernate-mapping&gt; &lt;class name="NotifEventGroupRel" table="TBLMEVENTGROUPREL"&gt; &lt;composite-id&gt; &lt;key-many-to-one name="notifEventGroup" class="NotifEventGroup" lazy="false" &gt; &lt;column name="EVENTGROUPID" precision="20" scale="0" not-null="true" /&gt; &lt;/key-many-to-one&gt; &lt;key-property name="eventName" type="java.lang.String"&gt; &lt;column name="EVENT" /&gt; &lt;/key-property&gt; &lt;/composite-id&gt; &lt;many-to-one name="emailTmplt" class="EmailTmplt" lazy="false" not-null="false" &gt; &lt;column name="EMAILTMPLTID"&gt;&lt;/column&gt; &lt;/many-to-one&gt; &lt;many-to-one name="smsTmplt" class="SmsTmplt" lazy="false" not-null="false"&gt; &lt;column name="SMSTMPLTID" /&gt; &lt;/many-to-one&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>The class of properties forming composite id is :</p> <pre><code>public class NotifEventGroup { private Long eventGroupId; private String name; ....... } public class EmailTmplt { private Long emailTmpltId; private String name; ..... } public class SmsTmplt { private Long smsTmpltId; private String name; .......... } </code></pre> <ul> <li>Do i need to make following properties transient :</li> </ul> <p>(shown below)</p> <pre><code>private transient NotifEventGroup notifEventGroup; //// composite id property private transient EmailTmplt emailTmplt; // composite id property private transient SmsTmplt smsTmplt; // composite id property </code></pre> <p>because findbug gives me <strong><code>Non-transient non-serializable instance field in serializable class</code></strong> error for the fields (if non transient).</p> <ul> <li>OR do i have to make their corresponding class serializable ?</li> </ul> <p>And what is the impact of doing any of the above two cases ?</p>
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