below type of oldprice attribute is String now I want to change from Java.lang.String to Java.land.Double.
<attributes>
<attribute qualifier="oldPrice" type="java.lang.String" generate="true">
</attribute>
</attributes>
<attributes>
<attribute qualifier="oldPrice" type="java.lang.Double" generate="true">
</attribute>
</attributes>
What is step for modify type from string to double.