Method addClass

src/main/java/org/codehaus/groovy/ast/CompileUnit.java:267–294

Adds a single class to this compilation unit, checking for duplicates and reporting errors. If a duplicate is detected, emits a SyntaxException describing the conflict and its possible resolution. Removes any pending compilation entry for the class if it exists. @param node the {@link Class

(ClassNode node)

     * @param node the {@link ClassNode} to add
     */
    public void addClass(ClassNode node) {
        node = node.redirect();
        String name = node.getName();
        ClassNode stored = classes.get(name);
        if (stored != null && stored != node) {
            // we have a duplicate class!
            // One possibility for this is, that we declared a script and a
            // class in the same file and named the class like the file
            SourceUnit nodeSource = node.getModule().getContext();
            SourceUnit storedSource = stored.getModule().getContext();
            String txt = "Invalid duplicate class definition of class " + node.getName() + " : ";
            if (nodeSource == storedSource) {
                // same class in same source
                txt += "The source " + nodeSource.getName() + " contains at least two definitions of the class " + node.getName() + ".\n";
                if (node.isScriptBody() || stored.isScriptBody()) {
                    txt += "One of the classes is an explicit generated class using the class statement, the other is a class generated from" +
                            " the script body based on the file name. Solutions are to change the file name or to change the class name.\n";
                }
            } else {
                txt += "The sources " + nodeSource.getName() + " and " + storedSource.getName() + " each contain a class with the name " + node.getName() + ".\n";
            }
            nodeSource.addErrorAndContinue(new SyntaxException(txt, node));
        }
        classes.put(name, node);

        ClassNode cn = classesToCompile.remove(name);
        if (cn != null) cn.setRedirect(node);
    }

    /**
     * Marks a class for compilation and associates it with its source location.