BUG? using own EntityResolver with SAX doesn't work

Question

Hello,
I was experimenting with the oracle.xml.parser.XMLParser using
the SAX interface.
I've written a test program that instantiates a driver and
registers my own handlers (which just print to System.out).
I also have my own org.xml.sax.EntityResolver, it looks like
this:
public class SAXEntityResolver implements EntityResolver {
public InputSource resolveEntity(String publicId,
String systemId) throws SAXException, IOException {
System.out.println("<<Call to resolveEntity>>");
try { //assume it's a URL of some sort
URL url=new URL(systemId);
return new InputSource(url.openStream());
catch (MalformedURLException e1) {
try { //it's not a URL, assume a file spec
FileInputStream fin=new FileInputStream(systemId);
return new InputSource(fin);
catch (FileNotFoundException e2) {
return null;
//don't understand it, let the parser handle it.
when I parse the following xml file:
<?xml version="1.0"?>
<!DOCTYPE dinner SYSTEM "dinner.dtd">
<dinner>
<location planet="Earth">Alma 3</location>
<time>12:30</time>
<date>Vandaag</date>
</dinner>
The parser generates an error to my org.xml.sax.ErrorHandler
which prints it to the screen. The output looks like this:
[C:\temp\xml]java -cp c:\TEMP\xml\oracle\lib\xmlparser.jar;.
SAXParseXML oracle.xml.parser.XMLParser dinner.xml
Locater accepted: oracle.xml.parser.SAXLocator@6ba51a96
document parsing start
[error: Couldn't find external DTD 'dinner.dtd']
element dinner start: null:4:1
(other output follows with no more errors)
It seems as if the Oracle XMLParser doesn't use my EntityResolver
to resolve it's external entities (the dinner.dtd file in this
case, the file is indeed there, trust me!), otherwise it would
have printed the message seen in the code above (<<Call to
resolveEntity>>). If you're wondering how I configured the
systemId in the SAX parser, here's how:
File f=new File(args[1]);
InputSource src=new InputSource(new FileInputStream(f));
src.setSystemId(f.toURL().toString());
p.parse(src);
Can you tell me why this is? (I use NT4 with jdk 1.2)
I've tested the same thing with the IBM, Microstar and Sun
parsers, and they all seem to work fine with this example...
Hope to hear from you! (cc in with mail please)
Erwin.
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Answer 1

Thanks for the post. You have identified a bug which will be
fixed in a maintenance release. Until that time you can parse a
String type rather than a InputSource type in SAXParseXML.java as
a workaround.
Oracle XML Team
http://technet.oracle.com
Erwin Vervaet (guest) wrote:
: Oracle XML Team wrote:
: : Which version of the parser are you using? If not 1.0.0.3
(the
: : latest) try that version. If the problem still exists it
would
: : help if you could provide your test program.
: The readme.html in the xmlparser_v1_0_0_3.zip file (I download
it
: on monday 8/2/1999) says: 'Oracle XML Parser 1.0.0.3.0'.
: So that's not the problem, below are all the files of the test
: program. The command I use to start the program is the
following
: (note that there cannot be a classpath clash problem!, I use
Sun
: jdk1.2 on NT4 SP4):
: [C:\temp\xml]dir
: Volume in drive C is unlabeled Serial number is 2C90:8BDE
: Directory of C:\temp\xml\*
: 11/02/99 10:50 <DIR> .
: 11/02/99 10:50 <DIR> ..
: 9/02/99 16:34 <DIR> aelfred
: 9/02/99 21:56 <DIR> oracle
: 8/02/99 17:44 <DIR> xml-ea2
: 8/02/99 14:10 <DIR> xml4j
: 9/02/99 22:44 <DIR> xp
: 9/02/99 16:42 215 dinner.dtd
: 9/02/99 23:03 167 dinner.xml
: 8/02/99 15:23 438 ParseXml.java
: 11/02/99 10:50 2.402 SAXDocHandler.class
: 9/02/99 21:14 1.585 SAXDocHandler.java
: 11/02/99 10:50 1.129 SAXEntityResolver.class
: 9/02/99 22:04 737 SAXEntityResolver.java
: 11/02/99 10:50 976 SAXErrHandler.class
: 9/02/99 15:39 495 SAXErrHandler.java
: 11/02/99 10:50 1.261 SAXParseXML.class
: 9/02/99 22:09 629 SAXParseXML.java
: 10.034 bytes in 11 files and 7 dirs 12.800 bytes
: allocated
: 201.152.512 bytes free
: [C:\temp\xml]java -cp c:\temp\xml\oracle\lib\xmlparser.jar;.
: SAXParseXML oracle.xml.parser.XMLParser dinner.xml
: Here are the files:
: //file SAXErrHandler.java
: import org.xml.sax.*;
: public class SAXErrHandler implements ErrorHandler {
: public void warning(SAXParseException exception) throws
: SAXException {
: System.err.println("[warning: " + exception +
: public void error(SAXParseException exception) throws
: SAXException {
: System.err.println("[error: " + exception + "]");
: public void fatalError(SAXParseException exception)
: throws SAXException {
: System.err.println("[fatal error: " + exception + "]");
: //file SAXEntityResolver.java
: import org.xml.sax.*;
: import java.net.*;
: import java.io.*;
: public class SAXEntityResolver implements EntityResolver {
: public InputSource resolveEntity(String publicId, String
: systemId) throws SAXException, IOException {
: System.out.println("<<Call to resolveEntity>> " + publicId + "
: + systemId);
: try { //assume it's a URL of some sort
: URL url=new URL(systemId);
: return new InputSource(url.openStream());
: catch (MalformedURLException e1) {
: try { //it's not a URL, assume a file
: spec
: FileInputStream fin=new
: FileInputStream(systemId);
: return new InputSource(fin);
: catch (FileNotFoundException e2) {
: return null; //don't understand
: it, let the parser handle it.
: //file SAXDocHandler.java
: import org.xml.sax.*;
: public class SAXDocHandler implements DocumentHandler {
: private Locator locator=null;
: public void startDocument() throws SAXException {
: System.out.println("document parsing start");
: public void setDocumentLocator(Locator locator) {
: System.out.println("Locater accepted: " + locator);
: this.locator=locator;
: public void startElement(String name, AttributeList atts)
: throws SAXException {
: System.out.println("element " + name + " start: "
: + locate());
: for (int i = 0; i < atts.getLength(); i++)
: System.out.println("attribute " +
: atts.getName(i) + "=" + atts.getValue(i) + " (" +
atts.getType(i)
: + ")");
: public void characters(char[] ch, int start, int length)
: throws SAXException {
: System.out.println("char data: " + new
: String(ch,start,length));
: public void ignorableWhitespace(char[] ch, int start, int
: length) throws SAXException {
: System.out.println("ignoring some whitespace: " +
: new String(ch,start,length));
: public void endElement(String name) throws SAXException {
: System.out.println("element " + name + " end: " +
locate());
: public void processingInstruction(String target, String
: data) throws SAXException {
: System.out.println("PI: " + target + "=" + data);
: public void endDocument() throws SAXException {
: System.out.println("document parsing end");
: private String locate() {
: if (locator!=null) {
: return locator.getSystemId() + ":" +
: locator.getLineNumber() + ":" + locator.getColumnNumber();
: return "";
: //file SAXParseXML.java
: import org.xml.sax.*;
: import org.xml.sax.helpers.ParserFactory;
: import java.io.*;
: public class SAXParseXML {
: public static void main(String[] args) {
: if (args.length>1) {
: try {
: Parser
: p=ParserFactory.makeParser(args[0]);
: p.setDocumentHandler(new
: SAXDocHandler());
: p.setErrorHandler(new
: SAXErrHandler());
: p.setEntityResolver(new
: SAXEntityResolver());
: File f=new File(args[1]);
: InputSource src=new
: InputSource(new FileInputStream(f));
: src.setSystemId(f.toURL().toString());
: p.parse(src);
: catch (Exception e) {
: e.printStackTrace();
: //file dinner.xml
: <?xml version="1.0"?>
: <!DOCTYPE dinner SYSTEM "dinner.dtd">
: <dinner>
: <location planet="Earth">Alma 3</location>
: <time>12:30</time>
: <date>Vandaag</date>
: </dinner>
: //file dinner.dtd
: <?xml version="1.0" encoding="UTF-8"?>
: <!ELEMENT dinner (location, time, date?)>
: <!ELEMENT location (#PCDATA)>
: <!ELEMENT time (#PCDATA)>
: <!ELEMENT date (#PCDATA)>
: <!ATTLIST location country CDATA "Belgium">
Oracle Technology Network
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