aspect CallerCrossRefsCount {
	//Count backwards edges (caller) in the callgraph (for testing)
	syn lazy int Program.countCallerEdgesInSourcefiles() {
		int count = 0;
    for(Iterator iter = compilationUnitIterator(); iter.hasNext(); ) {
      CompilationUnit cu = (CompilationUnit)iter.next();
      if(cu.fromSource())
        count += cu.countCallerEdges();
    }
		return count;
	}
	
	syn lazy int Program.countCallerEdgesInImportedfiles() {
		int count = 0;
    for(Iterator iter = compilationUnitIterator(); iter.hasNext(); ) {
      CompilationUnit cu = (CompilationUnit)iter.next();
      if(!cu.fromSource())
			  count += cu.countCallerEdges();
		}
		return count;
	}
	
	syn int ASTNode.countCallerEdges() {
		int count = 0;
		for (int i=0;i<getNumChild();i++){
			count += getChild(i).countCallerEdges();
		}
		return count;
	}
	
	eq MethodDecl.countCallerEdges() {
		return super.countCallerEdges() + callers().size();
	}
}