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Re: Hibernate Tools question
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created by <a href="https://community.jboss.org/people/maxandersen">Max Rydahl Andersen</a> in <i>JBoss Tools</i> - <a href="https://community.jboss.org/message/759541#759541">View the full discussion</a>
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<div class="jive-rendered-content"><p>Any particular reason your columns doesn't have not-null set ?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>in hbm.xml you can add a "default-value" meta-attribute.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-xml"><span class="jive-xml-tag"><property name="content" type="string" length="10000"></span> 
  <span class="jive-xml-tag"><meta attribute="default-value"></span><span class="jive-xml-quote"></span><span class="jive-xml-tag"></meta></span>
<span class="jive-xml-tag"></property></span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>that will make it generate:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java">content = <font color="red">""</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>For reverse engineering this is trickier, but there are two options.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Create a reveng.xml file that sets <meta> for the columns you need it for.</p><p><span>Example of that can be found at </span><a class="jive-link-external-small" href="https://github.com/hibernate/hibernate-tools/blob/master/src/test/org/hibernate/tool/test/jdbc2cfg/overridetest.reveng.xml#L58" target="_blank">https://github.com/hibernate/hibernate-tools/blob/master/src/test/org/hibernate/tool/test/jdbc2cfg/overridetest.reveng.xml#L58</a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Mind you that reveng.xml is "additative" meaning you can just specify the column name, everything else will come from jdbc.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If that is not enough you would need to implement a ReverseEngineeringStrategy that has a method similar to:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> Map columnToMetaAttributes(TableIdentifier identifier, String column) <font color="navy">{</font>
                    Map result = <font color="navy"><b>new</b></font> HashMap<String, MetaAttribute>();
 
                    MetaAttribute ma = <font color="navy"><b>new</b></font> MetaAttribute(<font color="red">"default-value"</font>);
 
                    String defaultValue = logicToFigureOutValueBasedonTableColumn(identifier, column);
 
                    ma.addValue(defaultValue);
                    result.put(<font color="red">"default-value"</font>, ma);
                    <font color="navy"><b>return</b></font> result;
<font color="navy">}</font>
</code></pre></div>
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