private JavaResource getJavaResource(final DirectoryResource sourceDir, final String relativePath)
throws FileNotFoundException {
if (Strings.isNullOrEmpty(relativePath)) {
throw new FileNotFoundException("Empty relative path");
}
String path =
relativePath.trim().endsWith(".java")
? relativePath.substring(0, relativePath.lastIndexOf(".java"))
: relativePath;
path = Packages.toFileSyntax(path) + ".java";
JavaResource target = sourceDir.getChildOfType(JavaResource.class, path);
return target;
}
