Finding Resources with PathMatchingResourcePatternResolver and URLClassloader in JARs

Question

I am trying to load all resources with a specific file-extension which are loaded dynamically at runtime using a URLClassloader.

Unfortunately the PathMatchingResour

Answer 1

As Tech Trip mentioned in the comment to his answer, I had an error in my pattern. The Spring-documentation is also quiet clear about that (see Warning): "classpath*:" when combined with Ant-style patterns will only work reliably with at least one root directory before the pattern starts...originates from a limitation in the JDK's ClassLoader.getResources()

So I changed my pattern to

classpath*/model/*.myextension

Since the JARs are created from an xText-DSL I have to enforce a convention that the model-folder has to be used.

Answer 2

Loading the files dynamically in Spring is simple, I'd change the approach to finding the files with extensions.

Try the following:

ClassLoader cl = this.getClass().getClassLoader(); 
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(cl);
Resource[] resources = resolver.getResources("classpath*:/*.xml") ;
for (Resource resource: resources){
    logger.info(resource.getFilename());
}