[castor-dev] SAXEXCEPTION: Unable to find FieldDescriptor using Castor JDO

[Rick Salsa]

Hi,

I'm trying to deploy a mapping and keep getting an error on two certain fields. Here is the mapping for the class that I"m having problems with:

  <class name="ca.mb.fusiongroup.ftp.domain.Files" identity="id" key-generator="MAX">
    <description>Files</description>
    <cache-type type="none" />
    <map-to table="files" xml="files" />
    <field name="id" type="big-decimal">
        <sql name="id" type="decimal" />
    </field>
    <field name="name" type="string">
        <sql name="name" type="varchar" />
    </field>
    <field name="type" type="string">
        <sql name="file_type" type="varchar" />
    </field>
    <field name="owner" type="com.opensymphony.module.user.provider.castor.entity.CastorUser">
        <sql many-table="owner" many-key="file_id" name="owner_id" />
    <field>
    <field name="to" type="com.opensymphony.module.user.provider.castor.entity.CastorUser">
        <sql name="send_to" type="decimal" />
    <field>
    <field name="file" type="stream" lazy="true">
        <sql name="file" type="blob" dirty="ignore" />
    </field>
  </class>

The problem is the "owner" and "to" fields. I keep receiving this exception:

org.xml.sax.SAXException: unable to find FieldDescriptor for 'field' in ClassDescriptor of field
        at org.exolab.castor.xml.UnmarshalHandler.startElement(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:415)
        at org.apache.xerces.impl.XMLNamespaceBinder.startElement(XMLNamespaceBinder.java:571)
        at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:756)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:752)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1453)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:333)
        at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:524)
        at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:580)
        at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1169)
        at org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
        at org.exolab.castor.mapping.Mapping.loadMappingInternal(Unknown Source)
        at org.exolab.castor.mapping.Mapping.loadMappingInternal(Unknown Source)
        at org.exolab.castor.mapping.Mapping.loadMapping(Unknown Source)
        at org.exolab.castor.jdo.engine.DatabaseRegistry.loadDatabase(Unknown Source)
        at org.exolab.castor.jdo.JDO.getDatabase(Unknown Source)
        at com.opensymphony.module.user.provider.castor.CastorDataProvider.getDatabase(CastorDataProvider.java:129)
        at com.opensymphony.module.user.provider.castor.CastorCredentialsProvider.list(CastorCredentialsProvider.java:149)
        at com.opensymphony.module.user.UserManager.getEntities(UserManager.java:265)
        at com.opensymphony.module.user.UserManager.getUsers(UserManager.java:120)
        at _users__jsp._jspService(_users__jsp.java:48)
        at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
        at com.caucho.jsp.Page.subservice(Page.java:485)
        at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
        at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(Unknown Source)
        at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(Unknown Source)
        at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
        at com.caucho.server.http.Invocation.service(Invocation.java:311)
        at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
        at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:221)
        at com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:163)
        at com.caucho.server.TcpConnection.run(TcpConnection.java:137)
        at java.lang.Thread.run(Thread.java:496)

The weird thing is, I have mapped that class (com.opensymphony.module.user.provider.castor.entity.CastorUser) above in the same mapping file, and it works. I'm not too sure what the exception is telling me. What I'm trying to do, is that class, keeps a record of files and who owns them and who they are for. I'm trying to map the user's id in the the owner field and who it is for in the to field.  I've also tried just making those fields and int and java.math.BigDecimal fields with no luck. Same exception all the time.


Any ideas would be very helpful.

Thanks in advance,
/rick