Hi,
I am trying to send a custom bean type to the service.
Based on the examples in encoding section, I have
written custom serializer and deserializer.
I deploy the service and when I try to invoke it, I am
getting a null pointer exception at the service.
Serialization part is working fine. The serializer is
able to create the XML structure properly by fecthing
the values from the bean instance. But at the server
side,
after deserialization, when I try to call the get
methods on the bean, it is throwing null pointer
exception.
en: tomcat 4.0.1 win nt
The serializer class is :
public class DataSer implements Serializer
{
public static final String FIRSTNAME= "firstname";
public static final String LASTNAME= "lastname";
public static final QName myTypeQName = new
QName("CustomerService", "CustomerBean");
public void serialize(QName name, Attributes
attributes,
Object value,
SerializationContext context)
throws IOException
{
if (!(value instanceof SparePartBean))
throw new IOException("Can't serialize a "
+ value.getClass().getName() + " with a
DataSerializer.");
CustomerBean customer = (CustomerBean)value;
context.startElement(name, attributes);
context.serialize(new QName("", FIRSTNAME),
null, customer .getFirstname(), String.class);
context.serialize(new QName("", LASTNAME),
null, customer .getLastname(), String.class);
context.endElement();
}
public String getMechanismType() { return
Constants.AXIS_SAX; }
public boolean writeSchema(Types types) throws
Exception {
return false;
}
}
The deserializer class:
public class DataDeser extends DeserializerImpl
{
public static final String FIRSTNAME= "firstname";
public static final String LASTNAME= "lastname";
public static final QName myTypeQName = new
QName("CustomerService", "CustomerBean");
private Hashtable typesByMemberName = new
Hashtable();
public DataDeser()
{
typesByMemberName.put(FIRSTNAME,
Constants.XSD_STRING);
typesByMemberName.put(LASTNAME,
Constants.XSD_STRING);
value = new SparePartBean();
}
public SOAPHandler onStartChild(String namespace,
String localName,
String prefix,
Attributes
attributes,
DeserializationContext context)
throws SAXException
{
QName typeQName =
(QName)typesByMemberName.get(localName);
if (typeQName == null)
throw new SAXException("Invalid element in
Data struct - " + localName);
// These can come in either order.
Deserializer dSer =
context.getDeserializerForType(typeQName);
try {
dSer.registerValueTarget(new
FieldTarget(value, localName));
} catch (NoSuchFieldException e) {
throw new SAXException(e);
}
if (dSer == null)
throw new SAXException("No deserializer
for a " + typeQName + "???");
return (SOAPHandler) dSer;
}
}
I have added the typemapping to my deployment
descriptor as shown below:
<service name="CustomerService" provider="java:RPC">
<parameter name="allowedMethods"
value="getDetails"/>
<parameter name="className"
value="com.axis.CustomerService"/>
<typeMapping qname="ns:local"
xmlns:ns="CusotmerService"
languageSpecificType="java:com.axis.CustomerBean"
serializer="com.eaaxis.chapter5.DataSer"
deserializer="com.axis.DeserFactory"/>
</service>
the soap request and response are:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/";>
<SOAP-ENV:Body>
<ns1:getDetails xmlns:ns1="CustomerService">
<CustomerBeanhref="#id0"/>
</ns1:getDetails>
<multiRef id="id0" SOAP-ENC:root="0"
xsi:type="ns2:CustomerBean"
xmlns:ns2="CustomerService">
<firstname xsi:type="xsd:string">billy</firstname >
<lastname xsi:type="xsd:string">bob</lastname >
</multiRef>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
<SOAP-ENV:Envelope
SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
<SOAP-ENV:Body>
<ns1:getDetailsResponse
SOAP-ENC:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";
xmlns:ns1="CustomerService"
xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/";>
<getDetailsResult
xsi:type="xsd:string">java.lang.NullPointerException</getDetailsResult
>
</ns1:etDetailsResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
Please help me out.
Regards,
Karna
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