Problems With XMLParser V2 Validation?

Question

I'm trying out the validation aspects of the XML Parser Version
2. The code below takes an XML file and a DTD file and does a
validating parse. When a try this on the sample family.xml and
family.dtd files it gives me an exception saying that the "dad"
attribute is not allowed (which it should be according to the
DTD).
Also, why does the dump out of the DTD not include all of the
declarations?
The output is ====>
Parsing [family.dtd]
DTD ==>
<!ELEMENT member ANY>
<!ATTLIST member memberid ID >
Switching validation on
Parsing [family.xml]
Exception [Illegal attribute name dad]
The code is ====>
import java.io.*;
import java.util.*;
import oracle.xml.parser.v2.*;
import org.w3c.dom.*;
public class XMLParserClient
public static void main(String args[])
try
String xmlFileName = args[0];
String dtdFileName = null;
if(args.length > 1) dtdFileName = args[1];
DOMParser domParser = new DOMParser();
if(dtdFileName != null)
// Parse the DTD from the file
FileReader dtdReader = new FileReader(dtdFileName);
System.out.println("Parsing [" + dtdFileName +
domParser.parseDTD( dtdReader, null);
DTD dtd = domParser.getDoctype();
// Dump out the DTD
StringWriter dtdStringWriter = new StringWriter();
PrintWriter dtdPrintWriter = new PrintWriter
(dtdStringWriter);
dtd.printExternalDTD(dtdPrintWriter);
String dtdString = dtdStringWriter.toString();
System.out.println("DTD ==>");
System.out.println(dtdString);
// Switch on validation
System.out.println("Switching validation on");
domParser.setDoctype(dtd);
domParser.setValidationMode(true);
// Parse the XML from the file
FileReader xmlReader = new FileReader(xmlFileName);
System.out.println("Parsing [" + xmlFileName + "]");
domParser.parse(xmlReader);
System.out.println("Parsed OK");
// Dump out the XML
System.out.println("Generating XML");
XMLDocument xmlDocument = domParser.getDocument();
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter
(stringWriter);
xmlDocument.print(printWriter);
String xmlString = stringWriter.toString();
System.out.println("XML ==>");
System.out.println(xmlString);
catch(Exception exception)
System.out.println("Exception [" + exception + "]");
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Answer 1

Dave Barton (guest) wrote:
: I'm trying out the validation aspects of the XML Parser Version
: 2. The code below takes an XML file and a DTD file and does a
: validating parse. When a try this on the sample family.xml and
: family.dtd files it gives me an exception saying that the "dad"
: attribute is not allowed (which it should be according to the
: DTD).
: Also, why does the dump out of the DTD not include all of the
: declarations?
: The output is ====>
: Parsing [family.dtd]
: DTD ==>
: <!ELEMENT member ANY>
: <!ATTLIST member memberid ID >
: Switching validation on
: Parsing [family.xml]
: Exception [Illegal attribute name dad]
: The code is ====>
: import java.io.*;
: import java.util.*;
: import oracle.xml.parser.v2.*;
: import org.w3c.dom.*;
: public class XMLParserClient
: public static void main(String args[])
: try
: String xmlFileName = args[0];
: String dtdFileName = null;
: if(args.length > 1) dtdFileName = args[1];
: DOMParser domParser = new DOMParser();
: if(dtdFileName != null)
: // Parse the DTD from the file
: FileReader dtdReader = new
FileReader(dtdFileName);
: System.out.println("Parsing [" + dtdFileName +
: domParser.parseDTD( dtdReader, null);
: DTD dtd = domParser.getDoctype();
: // Dump out the DTD
: StringWriter dtdStringWriter = new
StringWriter();
: PrintWriter dtdPrintWriter = new PrintWriter
: (dtdStringWriter);
: dtd.printExternalDTD(dtdPrintWriter);
: String dtdString = dtdStringWriter.toString();
: System.out.println("DTD ==>");
: System.out.println(dtdString);
: // Switch on validation
: System.out.println("Switching validation on");
: domParser.setDoctype(dtd);
: domParser.setValidationMode(true);
: // Parse the XML from the file
: FileReader xmlReader = new FileReader(xmlFileName);
: System.out.println("Parsing [" + xmlFileName + "]");
: domParser.parse(xmlReader);
: System.out.println("Parsed OK");
: // Dump out the XML
: System.out.println("Generating XML");
: XMLDocument xmlDocument = domParser.getDocument();
: StringWriter stringWriter = new StringWriter();
: PrintWriter printWriter = new PrintWriter
: (stringWriter);
: xmlDocument.print(printWriter);
: String xmlString = stringWriter.toString();
: System.out.println("XML ==>");
: System.out.println(xmlString);
: catch(Exception exception)
: System.out.println("Exception [" + exception + "]");
A simple bug in our parser to fix in our upcoming release --
thanks. The sequence is:
1) Parse DTD file using DOMParser.parseDTD()
2) set validation to true
3) set DTD in the parser using setDocType()
4) Parse XML file using DOMParser.parse()
The DOMParser works in non-validating mode by default, and so
parseDTD() ignores most of the declarations; this is a bug,
however, since parseDTD() should always operate in validating
mode.
A workaround exists -- set validation to true explicitly before
calling parseDTD(), i.e., domParser.setValidationMode(true),
before calling parseDTD().
Oracle XML Team
http://technet.oracle.com
Oracle Technology Network
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