Method sortClasses

src/main/java/org/codehaus/groovy/ast/ModuleNode.java:852–870

Sorts classes in dependency order based on class hierarchy. Inner classes and dependent classes are ordered after their dependencies. This ensures that base classes are defined before derived classes during compilation. Does nothing if the module is empty or contains only one class.

()

     * Does nothing if the module is empty or contains only one class.
     */
    public void sortClasses() {
        if (isEmpty()) return;
        List<ClassNode> classes = getClasses();
        if (classes.size() == 1) return;
        List<ClassNode> ordered = new LinkedList<>();
        int level = 1;
        while (!classes.isEmpty()) {
            for (Iterator<ClassNode> it = classes.iterator(); it.hasNext(); ) {
                ClassNode cn = it.next(), sc = cn.getSuperClass();

                for (int i = 1; i < level && sc != null; i += 1) sc = sc.getSuperClass();
                if (sc != null && sc.isPrimaryClassNode()) continue;
                ordered.add(cn);
                it.remove();
            }
            level += 1;
        }
        this.classes = ordered;
    }

    /**
     * Checks whether imports have been resolved for this module.