java - undefined element declaration 'xs:schema'

Question

I am completely new to web service stuff.

I have to write rest web service client for a web service. The web service runs fine on SoapUI. WSDL file for the URL is provided to me. But when I add the wsdl file in my Eclipse project, it gives compilation error

src-resolve.4.2: Error resolving component 'xs:schema'. It was detected that 'xs:schema' is in namespace 'http://www.w3.org/2001/XMLSchema', but components from this namespace are not referenceable from schema document 'file:///E:/Ashish%20Workspace/HATStoLSAMS%20Webservice/HATS2LSAMSWS/WebContent/WEB-INF/wsdl/CorpsiteService.svc.wsdl'. If this is the incorrect namespace, perhaps the prefix of 'xs:schema' needs to be changed. If this is the correct namespace, then an appropriate 'import' tag should be added to 'file:///E:/Ashish%20Workspace/HATStoLSAMS%20Webservice/HATS2LSAMSWS/WebContent/WEB-INF/wsdl/CorpsiteService.svc.wsdl'.

I googled a lot to get rid of these error but nothing worked. If I ignore the errors and try creating stubs using wsimport as well as wsdl2java commands it gives error

[ERROR] undefined element declaration 'xs:schema'
line 1 of http://chec.local/STAR.WCF/CorpsiteService.svc?singlewsdl

I am using below command to generate stubs

wsimport -d e:est -s E:wssrc http://chec.local/STAR.WCF/CorpsiteService.svc?singlewsdl -wsdllocation "../../../../../WEB-INF/wsdl/CorpsiteService.svc.wsdl"

I am stuck at this point and have been struggling on to this the whole day. Any help regarding this would be really helpful

Answer 1

The solution to this appears to be supply alternate bindings for xs:schema as described in https://metro.java.net/2.1/guide/Dealing_with_schemas_that_are_not_referenced.html

Specifically, for the http://www.w3.org/2001/XMLSchema which is often imported into the namespace xs, there is some additional work that needs to be done.

The command would be: wsimport -b http://www.w3.org/2001/XMLSchema.xsd -b customization.xjb something.wsdl

customization.xjb linked from the above is at https://www.java.net//blog/kohsuke/archive/20070228/xsd.xjb or copied from below

This customization exists to handle some naming conflicts that might arise from using the schema Schema (which is imported as the same name space in multiple schemas).

customization.xjb

<?xml version="1.0" encoding="UTF-8"?>
<bindings xmlns="http://java.sun.com/xml/ns/jaxb"
          xmlns:xsd="http://www.w3.org/2001/XMLSchema"
          xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
          version="2.0">

  <globalBindings>
    <xjc:simple />
  </globalBindings>

  <bindings scd="~xsd:complexType">
    <class name="ComplexTypeType"/>
  </bindings>

  <bindings scd="~xsd:simpleType">
    <class name="SimpleTypeType"/>
  </bindings>

  <bindings scd="~xsd:group">
    <class name="GroupType"/>
  </bindings>

  <bindings scd="~xsd:attributeGroup">
    <class name="AttributeGroupType"/>
  </bindings>

  <bindings scd="~xsd:element">
    <class name="ElementType"/>
  </bindings>

  <bindings scd="~xsd:attribute">
    <class name="attributeType"/>
  </bindings>
</bindings>

I have tried this with these files and the associated -b parameters to wsimport and have gotten (apparently) past this error (and on to other ones). That said, I'm not 100% certain that my new errors are not in part caused by this (and thus this wouldn't be a complete answer). Without the actual wsdl causing the problem, one can only take a reasonable guess as to solving the problem (and on to the next one).