Hi all,
I am getting the following exception when trying to UnMarshall an xml
file. The file gets validated properly in XMLSpy with the schema.
Am I missing something ?
Any help is highly appreciated.
thanks,
Saravanan
Exception=========================================
org.xml.sax.SAXException: unable to find FieldDescriptor for 'book' in
ClassDescriptor of order at
org.exolab.castor.xml.UnmarshalHandler.startElement(UnmarshalHandler.ja
va:1791) at
org.exolab.castor.xml.UnmarshalHandler.startElement(UnmarshalHandler.ja
va:1292) at
org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(
Unknown Source) at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDi
spatcher.dispatch(Unknown Source) at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unkn
own Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:605)
at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:513)
at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:691)
at Order.unmarshal(Order.java:91)
at ProcessOrder.main(ProcessOrder.java:16)
XSD===========================================================
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema targetNamespace="http://www.bookstore.org/bookstore-schema";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns="http://www.bookstore.org/bookstore-schema";
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xsd:element name="bookstore">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="book" type="BookType" minOccurs="0"
maxOccurs="unbounded"/>
<xsd:element name="order" type="OrderType" minOccurs="0"
maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:key name="book-pk">
<xsd:selector xpath="book"/>
<xsd:field xpath="ISDN"/>
</xsd:key>
<xsd:keyref name="book-ref" refer="book-pk">
<xsd:selector xpath="order/book-ref"/>
<xsd:field xpath="@ISDN"/>
</xsd:keyref>
</xsd:element>
<xsd:complexType name="BookType">
<xsd:sequence>
<xsd:element name="ISDN" type="xsd:string"/>
<xsd:element name="title" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="OrderType">
<xsd:sequence>
<xsd:element name="order-number" type="xsd:string"/>
<xsd:element name="book-ref" minOccurs="0" maxOccurs="unbounded">
<xsd:complexType>
<xsd:attribute name="ISDN" type="xsd:string"/>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
XML ============================================================
<?xml version="1.0" encoding="UTF-8"?>
<bookstore xmlns="http://www.bookstore.org/bookstore-schema";>
<book>
<ISDN>1234</ISDN>
<title>Rockclimbing</title>
</book>
<book>
<ISDN>5678</ISDN>
<title>Advanced Rockclimbing</title>
</book>
<order>
<order-number>1000</order-number>
<book-ref ISDN="1234"/>
<book-ref ISDN="5678"/>
</order>
</bookstore>
ProcessOrder.java=======================================
import java.util.*;
import java.io.*;
import org.exolab.castor.mapping.*;
import org.exolab.castor.types.*;
import org.exolab.castor.xml.*;
public class ProcessOrder {
public static void main(String args[]) {
try {
String filename = "order.xml";
if(args != null && args.length > 0 ) {
filename = args[0];
}
Reader reader = new FileReader( filename );
Order order = (Order) Order.unmarshal(reader);
printOrder(order);
}
catch(Exception ex) {
ex.printStackTrace();
}
}
private static void printOrder ( Order o) {
System.out.println("Order Number = " + o.getOrderNumber());
for(Enumeration e = o.enumerateBookRef(); e.hasMoreElements(); )
{ BookRef br = (BookRef) e.nextElement();
System.out.println("Book ref = " + br.getISDN());
}
}
}
==========================================================
--
Saravanan Subbiah
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