You can use parameter for this purpose, like for ACTUAL_DATE, following is the syntax.
in sql query you can write, you need to create input control in the jasperserver also while uploading this jrxml.
where date = $P{ACTUAL_DATE}
<parameter name="ACTUAL_DATE" class="java.util.Date">
<defaultValueExpression><![CDATA[(new java.util.Date())]]></defaultValueExpression>
</parameter>
<parameter name="STRING_PARAMETER" class="java.lang.String">
<defaultValueExpression><![CDATA[]]></defaultValueExpression>
</parameter>