get the list of source files from existing eclipse project using CDT - eclipse-cdt

Question

i am working on CDT eclipse plug in development, i am trying to get the list of sources files which exist in eclipse project explorer using CDT code using following code ,which results null.
Case1:
IFile[] files2 = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(new URI("file:/"+workingDirectory));
for (IFile file : files2) {
System.out.println("fullpath " +file.getFullPath());
}
Case2:
IFile[] files = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(getProject().getRawLocationURI());
for (IFile file : files) {
System.out.println("fullpath " +file.getFullPath());
}
Case3:
IFile[] files3 = ResourceLookup.findFilesByName(getProject().getFullPath(),ResourcesPlugin.getWorkspace().getRoot().getProjects(),false);
for (IFile file : files3) {
System.out.println("fullpath " +file.getFullPath());
}
Case4:
IFolder srcFolder = project.getFolder("src");
Case 1 ,2,3 giving me output null, where i am expecting list of files;
in Case 4: i am getting the list of "helloworld/src" files, but i am expecting to get the files from the existing project mean main root ,ex:"helloworld"
please suggest me on this.

Answer 1

You can either walk through the worspace resources tree using IResourceVisitor - or you can walk through CDT model:
private void findSourceFiles(final IProject project) {
final ICProject cproject = CoreModel.getDefault().create(project);
if (cproject != null) {
try {
cproject.accept(new ICElementVisitor() {
#Override
public boolean visit(final ICElement element) throws CoreException {
if (element.getElementType() == ICElement.C_UNIT) {
ITranslationUnit unit = (ITranslationUnit) element;
if (unit.isSourceUnit()) {
System.out.printf("%s, %s, %s\n", element.getElementName(), element.getClass(), element
.getUnderlyingResource().getFullPath());
}
return false;
} else {
return true;
}
}
});
} catch (final CoreException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Note there may be more source files then you actually want (e.g. you may not care system about headers) - you can filter them by checking what the underlying resource is.