replace xml particular node element value with other value in mule - mule

Question

<healthcare>
<plans>
<plan1>
<planid>100</planid>
<planname>medical</planname>
<desc>medical</desc>
<offerprice>500</offerprice>
<area>texas</area>
</plan1>
<plan2>
<planid>101</planid>
<planname>dental</planname>
<desc>dental</desc>
<offerprice>1000</offerprice>
<area>texas</area>
</plan2>
</plans>
</healthcare>
<splitter evaluator="xpath" expression="/healthcare/plans" doc:name="Splitter"/>
<transformer ref="domToXml" doc:name="Transformer Reference"/>
<logger level="INFO" doc:name="Logger" message=" plans detils...#[message.payload]" />
i want replace offerprice value with other values during runtime.anyhelp appreciated.I tried various various ways . anyone shed light means it saves me lot

Answer 1

You could use XSLT and use identity templates to replace the one element.Or if your really want to do it with MEL, convert to DOM and use Dom4j APIs to set the value and then convert back to XML if needed:
<expression-component><![CDATA[
node = message.payload.getRootElement().selectSingleNode('//plans/plan1/planid');
node.text = 'newvalue';
]]></expression-component>
<mulexml:dom-to-xml-transformer />
<logger level="ERROR" message=" #[payload]" />
EDIT
Here is an example if you want to update multiple nodes. If the transformation gets any more complex, I would really suggest taking a look at XSLT.
<mulexml:xml-to-dom-transformer returnClass="org.dom4j.Document" />
<expression-component><![CDATA[
plans = message.payload.getRootElement().selectNodes('//plans/*');
foreach (plan : plans){
plan.selectSingleNode('offerprice').text = '3000';
} ]]></expression-component>
<mulexml:dom-to-xml-transformer />
<logger level="ERROR" message=" #[payload]" />