[ http://issues.apache.org/jira/browse/XERCESJ-444?page=all ]
Michael Glavassevich reassigned XERCESJ-444:
--------------------------------------------
Assignee: Michael Glavassevich (was: Xerces-J Developers Mailing List)
> SAXException thrown by EntityResolver is reported as IOException
> ----------------------------------------------------------------
>
> Key: XERCESJ-444
> URL: http://issues.apache.org/jira/browse/XERCESJ-444
> Project: Xerces2-J
> Issue Type: Bug
> Components: SAX
> Affects Versions: 2.0.2
> Environment: Operating System: Windows XP
> Platform: PC
> Reporter: Kohsuke Kawaguchi
> Assigned To: Michael Glavassevich
> Attachments: ExceptionBuilder.java, jira_444_alt_patch.txt,
> jira_444_patch.txt
>
>
> If I throw a SAXException that has an IOException as its nested exception
> from
> EntityResolver, the parser will report it as IOException, not as SAXException.
> Here is what happens. The SAXException thrown by an EntityResolver is first
> catched by org.apache.xerces.utilEntityResolverWrapper. The following code is
> in the catch block
> > // error resolving entity
> > catch (SAXException e) {
> > Exception ex = e.getException();
> > if (ex == null) {
> > ex = e;
> > }
> > throw new XNIException(ex);
> > }
> Since the SAXException I throw has a nested exception, an XNIException with
> nested IOException will be re-thrown from here.
> This exception will be relayed by several components, and eventually it will
> come to the parse method of the org.apache.xerces.parsers.AbstractSAXParser
> class.
> (line.1194)
> > catch (XNIException e) {
> > Exception ex = e.getException();
> > if (ex == null) {
> > throw new SAXException(e.getMessage());
> > }
> > if (ex instanceof SAXException) {
> > throw (SAXException)ex;
> > }
> > if (ex instanceof IOException) {
> > throw (IOException)ex;
> > }
> > throw new SAXException(ex);
> > }
> Since the nested exception is IOException, it will be thrown as IOException.
> The net effect is that my application handler will receive an IOException
> even
> though I threw a SAXException.
> I believe this is a bug; I should receive what I threw.
> It seems to me that the bug is in the catch block of EntityResolverWrapper.
> It
> should just wrap the SAXException into XNIException, instead of trying to
> unwrap it. So the code should be just:
> // error resolving entity
> catch (SAXException e) {
> throw new XNIException(e);
> }
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