Are you familiar with Betwixt from Apache Jakarta Commons? Betwixt has a very
convenient way of
loading mapping files. I was wondering if this could be added to Castor as well.
Basically,
mapping files are loaded according to qualified class name.
For instance, if I had an instance of a class "mypackage.mysubpackage.MyClass" that
were to be
marshalled or unmrshalled, Castor could look on the classpath for a file
"mypackage/mysubpackage/MyClass.castor.xml" if there was no mapping already loaded for
this class.
If it exists, it could use this mapping file for the class. This is easily obtained
via code
similar to the following (within the Marshaller/Unmarshaller classes)...
...
import org.exolab.castor.mapping.Mapping;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.net.URL;
...
if (noMappingSpecifiedForTheGivenClass)
{
URL systemResource = URL
mapping.getClassLoader().getSystemResource(beanClassName.replace('.',
'/') + ".castor.xml");
if (systemResource != null)
{
// read & load mapping file for this specified class...
InputStream is = new
BufferedInputStream(systemResource.openConnection().getInputStream());
...
is.close();
}
else
{
// do default marshalling/unmarshalling...
...
}
}
...
This way, all one has to do is partner every class with a mapping file, which is much
easier to
keep track of within larger projects...
my-jar-file.jar
{
mypackage/MyClass1.class
mypackage/MyClass1.castor.xml
mypackage/MyClass2.class
mypackage/MyClass2.castor.xml
mypackage/mysubpackage/MyClass3.class
mypackage/mysubpackage/MyClass3.castor.xml
mypackage/mysubpackage/MyClass1.class
mypackage/mysubpackage/MyClass1.castor.xml
mypackage/mysubpackage/MyClass2.class
mypackage/mysubpackage/MyClass2.castor.xml
mypackage/mysubpackage/MyClass3.class
mypackage/mysubpackage/MyClass3.castor.xml
}
Thanks!
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