How to get the line number an xml element is on via the Java w3c dom api

Is there a way to lookup the line number that a given element is at in an xml file via the w3c dom api?

My use case for this is that we have 30,000+ maps in kml/xml format. I wrote a unit test that iterates over each file found on the hard drive (about 17GB worth) and tests that it is parseable by our application. When it fails I throw an exception that contains the element instance that was considered "invalid". In order for our mapp开发者_StackOverflowing department (nobody here knows how to program) to easily track down the typo we would like to log the line number of the element that caused the exception.

Can anybody suggest a way to do this? Please note we are using the W3C dom api included in the Android 1.6 SDK.

I'm not sure whether the Android API is different, but a normal Java application could catch a SAXParseException when parsing and look at the line number.

I may be wrong, but the line number shouldn't be relevant to your XML parser/reader as long as the XML structure itself is valid.

You might try to extrapolate the line-number programatically on the assumption that each node/content must be on a distinct line but it's going to be tricky.

It looks like you're validating your XML files. That is, you're not interested in whether the documents are syntactically correct ("well-formed"), but if they are semantically valid for your application. The right tool for this would be a validating XML parser, coupled with a dedicated XML scheme. See for example this tutorial on XML validation in Java. Validation errors will usually contain detailed error information, including the line number of problematic elements.