On Feb 27, 2008, at 7:31 AM, Tobia Conforto wrote:
Actually XSLTC does preserve the cause, but it's wrapped in
TransformerExceptions.
Well if that's the case then Cocoon should show it to you. See
ExceptionGenerator [1], it uses ExceptionUtils.getCause(current) to
unroll exceptions. If ExceptionUtils.getCause() method does not
understand TransformerExceptions, then it should be enhanced.
I managed to solve the issue by patching TraxTransformer so that it
removes wrapping exceptions (of SAXException and
TransformerException type, arbitrarily nested) before re-throwing
the core exception.
That is not the preferred solution; instead, please check why
TransformerException is not unrolled by Cocoon's error page.
Vadim
I will leave it to this list to figure out if it's a useful patch to
merge in Cocoon.
It certainly makes the XSLTC transformer much more useable.
But maybe there's a better place to put this un-wrapping code?
Tobia
--- transformation/TraxTransformer.orig 2008-02-26
18:28:23.000000000 +0100
+++ transformation/TraxTransformer.java 2008-02-27
13:28:27.000000000 +0100
@@ -29,6 +29,7 @@
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.TransformerHandler;
+import javax.xml.transform.TransformerException;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.configuration.Configurable;
@@ -586,8 +587,21 @@
super.endDocument();
} catch(Exception e) {
- Throwable realEx = this.errorListener.getThrowable();
- if (realEx == null) realEx = e;
+ Throwable realEx = e;
+ while (true) {
+ if (realEx instanceof SAXException) {
+ Throwable nested = ((SAXException)
realEx).getException();
+ if (nested == null)
+ break;
+ realEx = nested;
+ } else if (realEx instanceof TransformerException) {
+ Throwable nested = ((TransformerException)
realEx).getException();
+ if (nested == null)
+ break;
+ realEx = nested;
+ } else
+ break;
+ }
if (realEx instanceof RuntimeException) {
throw (RuntimeException)realEx;
