Description
The ItemHideFunction hides equal values in a group. Only the first changed value is printed. This function uses the property tag to define the name of the object in the Item Section that should be made visible or invisible by this function. The property tag, field, defines the field in the datasource or the expression which should be used to determine the visibility.
Example
<function class="org.jfree.report.function.ItemHideFunction" name="HideCategory">
<properties>
<property name="field">Category</property>
</properties>
</function>