Name: eaR10174 Date: 02/08/2002


  Method org.xml.sax.EntityResolver.resolveEntity() of application's resolver is
invoked with null systemId during the parsing document with external DTD. The
entity's systemId can't be null according to the XML specification.
  The bug appears in both cases when the document is parsed by either DocumentBuilder
(see test1.java below) or SAXParser (see test2.java below).
  This bug is found in jaxp-1.2.0-beta-b06-06_feb_2002 and affects the and affects the
tests in the JAXP 1.2 TCK (same as in JCK Merlin).
  
  api/org_w3c/dom/Entity/index.html#GetSystemId[GetSystemId002]
  api/org_w3c/dom/Entity/index.html#GetNotationName[GetNotationName003]
  api/org_w3c/dom/Document/index.html#GetDoctype[GetDoctype001]
  api/org_xml/sax/helpers/XMLFilterImpl/index.html#skippedEntity[skippedEntity001]
  api/org_xml/sax/helpers/DefaultHandler/index.html#skippedEntity[skippedEntity001]
  api/org_w3c/dom/DocumentType/index.html#GetEntities[GetEntities008]
  api/org_w3c/dom/DocumentType/index.html#GetNotations[GetNotations004]
  api/org_w3c/dom/Entity/index.html#GetPublicId[GetPublicId002]
  api/javax_xml/parsers/SAXParser/index.html#Parse[Parse060]
  api/javax_xml/parsers/SAXParser/index.html#Parse[Parse061]

------------------------------------test1.java-----------------------------
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import java.io.StringReader;

public class test1 {

    public static void main (String[] args) {
        String docXML = "<?xml version='1.0' standalone='no' ?>"
                      + "<!DOCTYPE seven-wonders SYSTEM 'doc_type.dtd'>"
                      + "<seven-wonders>"
                      + " <first>I'm first</first>"
                      + "</seven-wonders>";

        final String docTypeDTD = "<!ELEMENT seven-wonders (first)>"
                                + "<!ELEMENT first (#PCDATA)>";


        try {
            EntityResolver resolver = new EntityResolver() {
                public InputSource resolveEntity(String publicId,
                                                 String systemId)
                        throws SAXException {
                    System.out.println("systemId: " + systemId);
                    return (systemId.equals("doc_type.dtd"))
                            ? new InputSource(new StringReader(docTypeDTD))
                            : null;
                }
            };

            InputSource inSource = new InputSource(new StringReader(docXML));
            inSource.setSystemId("test.xml");

            DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance()
                .newDocumentBuilder();
            docBuilder.setEntityResolver(resolver);
            docBuilder.parse(inSource);

            System.out.println("OK: Document parsed.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
---------------------------------------------------------------------------
% echo $CLASSPATH
.:/home/evg/lib/dom.jar:/home/evg/lib/sax.jar:/home/evg/lib/jaxp-api.jar:/home/evg/lib
/xalan.jar:/home/evg/lib/xercesImpl.jar

% java -showversion test1
java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)

systemId: null
java.lang.NullPointerException
        at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:257)
        at
org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:209)
        at test.main(test.java:39)
---------------------------------------------------------------------------
------------------------------------test2.java-----------------------------
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import java.io.StringReader;

public class test2 {

    public static void main (String[] args) {
        String docXML = "<?xml version='1.0' standalone='no' ?>"
                      + "<!DOCTYPE seven-wonders SYSTEM 'doc_type.dtd'>"
                      + "<seven-wonders>"
                      + " <first>I'm first</first>"
                      + "</seven-wonders>";

        final String docTypeDTD = "<!ELEMENT seven-wonders (first)>"
                                + "<!ELEMENT first (#PCDATA)>";


        try {
            DefaultHandler handler = new DefaultHandler() {
                public InputSource resolveEntity(String publicId,
                                                 String systemId)
                        throws SAXException {
                    System.out.println("systemId: " + systemId);
                    return (systemId.equals("doc_type.dtd"))
                            ? new InputSource(new StringReader(docTypeDTD))
                            : null;
                }
            };

            InputSource inSource = new InputSource(new StringReader(docXML));
            inSource.setSystemId("test.xml");

            SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
            parser.parse(inSource, handler);

            System.out.println("OK: Document parsed.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
---------------------------------------------------------------------------
---------------------------------------------------------------------------
% echo $CLASSPATH
.:/home/evg/lib/dom.jar:/home/evg/lib/sax.jar:/home/evg/lib/jaxp-api.jar:/home/evg/lib
/xalan.jar:/home/evg/lib/xercesImpl.jar

% java -showversion test2
java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)

systemId: null
java.lang.NullPointerException
        at
org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1193)
        at javax.xml.parsers.SAXParser.parse(Unknown Source)
        at test.main(test.java:37)
---------------------------------------------------------------------------

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