Disable exceptions

[Vanuan]

I'm trying to port xmlbeansxx to the system where exceptions are not available.
So, I need to replace exceptions with return value. Do you have any suggestions? Where should I start?

[stawel]

This can be problematic,
but what do you mean with: "replace exceptions with return value"
do you want something similar to XPCOM ?

for example a getContacts looks like this (XPCOM code):
nsresult ContactBook::GetContacts(nsIArray **aContacts)
{
... some code ....
return NS_OK;
}

the return value (contact list) is the last parameter and the nsresult is a
error code.

or do you want just ignore all errors ?

in xmlbeansxx you have getters and setters like in java xmlbeans.

2011/10/4 John Yani <
reply@reply.github.com>

I'm trying to port xmlbeansxx to the system where exceptions are not
available.
So, I need to replace exceptions with return value. Do you have any
suggestions? Where should I start?

Reply to this email directly or view it on GitHub:
#4

[Vanuan]

Yes, I mean that instead of throwing an exception somewhere in

ContactBook::Factory::parse();

I want parse method return BeansException, so I could write

BeansException error = ContactBook::Factory::parse("...");
if(error.getType() != BeansException::OK)
{
    // handle error
}
else
{
    // use parsed object
}

[stawel]

it is very difficult to implement.
You have to rewrite the entire code generator.

It would be easier to remember all "throws" in a static table
and return empty xmlbeansxx objects.
something like this:

ContactBook c = ContactBook::Factory::parse("...");
if(BeansException::getError() != BeansException::OK)
{
// handle error
}
else
{
// use parsed object
}

I'm also not sure if you can use xercesc without exceptions.

2011/10/4 John Yani <
reply@reply.github.com>

Yes, I mean that instead of throwing an exception somewhere in

ContactBook::Factory::parse();

I want parse method return BeansException, so I could write

BeansException error = ContactBook::Factory::parse("...");
if(error.getType() != BeansException::OK)
{
// handle error
}
else
{
// use parsed object
}

Reply to this email directly or view it on GitHub:
#4 (comment)

[Vanuan]

Thanks for advice!

I saw that there is XmlParser class from which XercesParser and LibXMLParser are inherited. Can I use LibXMLParser? And how difficult is to add support for a new XML parsing library, for example, libexpat?

libxml2 is written in C, so it doesn't have exceptions.

[stawel]

hm..
we stopped support xml2 (libXMLParser.cpp) because we couldn't throw any
expetions from any callback.
but you should be able to use it.

to support libexpat add you own parser class similar to XercesParser (or
LibXMLParser) so it is about 15k bytes of code :)

2011/10/4 John Yani <
reply@reply.github.com>

Thanks for advice!

I saw that there is XmlParser class from which XercesParser and
LibXMLParser are inherited. Can I use LibXMLParser? And how difficult is to
add support for a new XML parsing library, for example, libexpat?

libxml2 is written in C, so doesn't have exceptions.

Reply to this email directly or view it on GitHub:
#4 (comment)