how to update soap response namespace value with wso2 ei - soap

Question

I have a proxy service to expose a soap api on wso2 ei, and i need to update the namespace value of the soap response with my proxy service and return another namespace value.
I have tried with the enrich mediator as follows inside the outsequence.
<property name="namespace"
scope="default"
type="STRING"
value="http://tempuri-updated.org/"/>
<enrich>
<source clone="false" property="namespace" type="property"/>
<target xmlns:ser="http://services.samples"
xmlns:ns="http://org.apache.synapse/xsd"
xpath="namespace-uri($body/*)/text()"/>
</enrich>
I get this error.
ERROR - EnrichMediator Invalid Target object to be enrich.
my actual soap response is as follows
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<AddResponse xmlns="http://tempuri.org/">
<AddResult>12</AddResult>
</AddResponse>
</soap:Body>
</soap:Envelope>
my expected output as follows
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<AddResponse xmlns="http://tempuri-updated.org/">
<AddResult>12</AddResult>
</AddResponse>
</soap:Body>
</soap:Envelope>
All your feedbacks are welcome

Answer 1

This cannot be done with the enrich mediator. Because in the code related to enrich mediator target handling [1], the parsed result of an xpath expression should be one of SOAPHeaderImpl, OMElement, OMText or OMAttribute. Since namespace-uri() is just returning a string value, the target to be enriched is becoming invalid. As an alternative to this use case, we can do an XSLT transformation using the XSLT mediator. Following is a sample XSL style sheet I tried.
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="#* | comment() | processing-instruction()">
<xsl:copy/>
</xsl:template>
<xsl:template match="*">
<xsl:element name="{local-name()}"
namespace="http://tempuri-updated.org/">
<xsl:apply-templates select="#* | node()"/>
</xsl:element>
</xsl:template>
We can refer this style sheet in the XSLT mediator before sending the response out from the EI. The new namespace will be added to the body.

Answer 2

Try this.
http://codertechblog.com/wso2-change-payload-soap-envelope-namespace/
<sequence name="seTestChangeNamespace" trace="disable" xmlns="http://ws.apache.org/ns/synapse">
(...)
<enrich>
<source type="body"/>
<target type="property" property="INPUT_MESSAGE"/>
</enrich>
<enrich>
<source type="inline">
<myns:Envelope xmlns:myns="http://schemas.xmlsoap.org/soap/envelope/">
<myns:Body/>
</myns:Envelope>
</source>
<target type="envelope"/>
</enrich>
<enrich>
<source type="property" property="INPUT_MESSAGE"/>
<target type="body"/>
</enrich>
(...)
</sequence>