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public class ChainedAction<D extends ChainedActionDefinition> extends AbstractAction<ChainedActionDefinition> implements ChainedActionCallback {
    private final Item item;
    private final Context context;
    private final ComponentProvider componentProvider;
    private Iterator<Action> it;
    public ChainedAction(D definition, final Item item, ComponentProvider componentProvider) {
        super(definition);
        this.item = item;
        this.componentProvider = componentProvider;
        this.context = new SimpleContext();
    }
    private void prepareExecution() throws ActionExecutionException {
        Collection<Action> actions = new LinkedList<Action>();
        for (ActionDefinition actionDefinition : getDefinition().getActions()) {
            Action action = createAction(actionDefinition, item, context, this);
            actions.add(action);
        }
        this.it = actions.iterator();
    }
    @Override
    public void execute() throws ActionExecutionException {
        prepareExecution();
        executeNext();
    }
    private void executeNext() throws ActionExecutionException {
        while(it.hasNext()) {
            Action action = it.next();
            action.execute();
            if (action instanceof DeferredAction) {
                break;
            }
        }
    }

    private Action createAction(ActionDefinition actionDefinition, Object... args) throws ActionExecutionException {
        Class<? extends Action> implementationClass = actionDefinition.getImplementationClass();
        if (implementationClass == null) {
            throw new ActionExecutionException("No action class set for action: " + actionDefinition.getName());
        }
        Object[] combinedParameters = new Object[args.length + 1];
        combinedParameters[0] = actionDefinition;
        System.arraycopy(args, 0, combinedParameters, 1, args.length);
        try {
            return componentProvider.newInstance(implementationClass, combinedParameters);
        } catch (MgnlInstantiationException e) {
            throw new ActionExecutionException("Could not instantiate action class for action: " + actionDefinition.getName(), e);
        }
    }

    @Override
    public void proceed() {
        try {
            executeNext();
        } catch (ActionExecutionException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }
    @Override
    public void abort() {
    }
}