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I received no reply on the axis-user list
and thought I would post here before I submit a bug. Thanks. From: Brian
Fitzpatrick I’m working with a complexType that contains various
arrays. It appears that Axis 1.4 is not properly handling null items that occur
within the array. Instead of using the nillable=”true/false”
setting on the <element> that defines the Array, it is determining
whether to send xsi:nil based on whether the complexType that contains the
arrays, can be omitted (minOccurs=0). So, it doesn’t seem to matter
the settings on the <element> tag of the arrays, only whether the
enclosing complexType can be omitted. This causes several problems, especially with .NET
interoperability: (Axis client to .NET
server) .NET will define the parameters of a service method as
omittable (minOccurs=0), so an Axis client will never send xsi:nil to the .NET
server, which throws off the size of the array, since the null array item is
just omitted. (.NET client to .NET
server) When the same service is used from a .NET client, it will
correctly use the nillable=”true/false” setting of the array to
determine whether to send xsi:nil or omit the array item. So a single
complexType could have multiple arrays, in which some of them are allowed to be
null and others are not (Axis client to Axis
server) Axis will define the parameters of a service method as
required (minOccurs=1), so an Axis client will ALWAYS send xsi:nil when an
array item is null. It does not look at the <element> declaration
for that array to determine if it should be sending xsi:nil or omitting the
item, based on the nillable=”true/false” setting. So an Axis client
will sometimes be sending xsi:nil when it should not be. From my interpretation, it should be looking at the
nillable=”true/false” setting on the <element> tag that
defines the array to determine whether to send the xsi:nil or not. Is
this a known problem? Should I submit a bug report? Thanks. Detailed info: I created a very simple .NET web service that defined a
complexType named “TestObject”. TestObject contains one string
array call StringItems, which is set for nillable=”true”. The WSDL
snippets that follow were generated by .NET. <s:complexType
name="TestObject">
<s:sequence>
<s:element minOccurs="0" maxOccurs="1"
name="StringItems" type="tns:ArrayOfString" />
</s:sequence>
</s:complexType> <s:complexType
name="ArrayOfString">
<s:sequence>
<s:element minOccurs="0" maxOccurs="unbounded"
name="string" nillable="true" type="s:string"
/>
</s:sequence>
</s:complexType> I created one method to send and receive this type: <s:element
name="SendObjectWithArray">
<s:complexType>
<s:sequence>
<s:element minOccurs="0" maxOccurs="1"
name="test" type="tns:TestObject" />
</s:sequence>
</s:complexType> </s:element> I created an Axis client and a .NET client to call this
service. I called the service with the following array: obj.StringItems = new string[]
{ "first",
"second",
null, "fourth (after null)",
"fifth"
}; The axis client omitted the null parameter in the
request. However, when a null was sent back from the server, it correctly
preserved it in the return array. The .NET client sent xsi:nil for the null parameter and
correctly preserved the return xsi:nil as a null in the return array. The full WSDL: <?xml version="1.0"
encoding="utf-8"?> <wsdl:definitions
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/"
xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="urn:test"
xmlns:s="http://www.w3.org/2001/XMLSchema"
xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/"
xmlns:http="http://schemas.xmlsoap.org/wsdl/http/"
targetNamespace="urn:test" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"> <wsdl:types> <s:schema
elementFormDefault="qualified"
targetNamespace="urn:test"> <s:element
name="SendObjectWithArray">
<s:complexType>
<s:sequence>
<s:element minOccurs="0" maxOccurs="1"
name="test" type="tns:TestObject" />
</s:sequence>
</s:complexType> </s:element> <s:complexType
name="TestObject">
<s:sequence>
<s:element minOccurs="0" maxOccurs="1"
name="StringItems" type="tns:ArrayOfString" />
</s:sequence> </s:complexType> <s:complexType
name="ArrayOfString">
<s:sequence>
<s:element minOccurs="0" maxOccurs="unbounded"
name="string" nillable="true" type="s:string"
/>
</s:sequence>
</s:complexType> <s:element
name="SendObjectWithArrayResponse">
<s:complexType>
<s:sequence>
<s:element minOccurs="0" maxOccurs="1"
name="SendObjectWithArrayResult" type="tns:TestObject"
/>
</s:sequence>
</s:complexType> </s:element> </s:schema> </wsdl:types> <wsdl:message
name="SendObjectWithArraySoapIn"> <wsdl:part
name="parameters" element="tns:SendObjectWithArray" /> </wsdl:message> <wsdl:message
name="SendObjectWithArraySoapOut"> <wsdl:part
name="parameters" element="tns:SendObjectWithArrayResponse"
/> </wsdl:message> <wsdl:portType
name="ArrayTestSoap"> <wsdl:operation
name="SendObjectWithArray"> <wsdl:input
message="tns:SendObjectWithArraySoapIn" /> <wsdl:output
message="tns:SendObjectWithArraySoapOut" /> </wsdl:operation> </wsdl:portType> <wsdl:binding
name="ArrayTestSoap" type="tns:ArrayTestSoap"> <soap:binding
transport="http://schemas.xmlsoap.org/soap/http" /> <wsdl:operation
name="SendObjectWithArray"> <soap:operation
soapAction="urn:test/SendObjectWithArray" style="document"
/> <wsdl:input>
<soap:body use="literal" /> </wsdl:input> <wsdl:output>
<soap:body use="literal" /> </wsdl:output> </wsdl:operation> </wsdl:binding> <wsdl:binding
name="ArrayTestSoap12" type="tns:ArrayTestSoap"> <soap12:binding
transport="http://schemas.xmlsoap.org/soap/http" /> <wsdl:operation
name="SendObjectWithArray"> <soap12:operation
soapAction="urn:test/SendObjectWithArray" style="document"
/> <wsdl:input>
<soap12:body use="literal" /> </wsdl:input> <wsdl:output>
<soap12:body use="literal" /> </wsdl:output> </wsdl:operation> </wsdl:binding> <wsdl:service
name="ArrayTest"> <wsdl:port
name="ArrayTestSoap" binding="tns:ArrayTestSoap"> <soap:address
location="http://localhost:1792/arraytest/ArrayTest.asmx" /> </wsdl:port> <wsdl:port
name="ArrayTestSoap12" binding="tns:ArrayTestSoap12"> <soap12:address
location="http://localhost:1792/arraytest/ArrayTest.asmx" /> </wsdl:port> </wsdl:service> </wsdl:definitions> |
