It has been reported that Filer.createResource will ignore the relative directory unless an explicit -d option is used:

http://forum.java.sun.com/thread.jspa?threadID=5240999

My annotation processor tries to create an output file called META-INF/persistence.xml in the classes output directory (i.e. -d option to javac). So, I wrote following code:

final FileObject fo = processingEnv.getFiler().createResource(
StandardLocation.CLASS_OUTPUT, // -d option to javac
"",
"META-INF/persistence.xml",
null);


This works as long as I pass -d option to javac. e.g., if I invoke:
javac -d . Foo.java
it creates ./META-INF/persistence.xml. But, if I invoke
javac Foo.java
it creates ./persistence.xml; where is my META-INF directory gone?

Sahoo