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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013-2014 sagyf Yang. The Four Group.
 */

package goja.mvc.render.ftl.layout;

import goja.mvc.render.ftl.kit.DirectiveKit;
import goja.mvc.render.ftl.kit.TemplateDirectiveBodyOverrideWraper;

import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;

import java.io.IOException;
import java.util.Map;

/**
 *  . 
 *
 * @author poplar.yfyang
 * @version 1.0 2012-04-20 上午7:34
 * @since JDK 1.5
 */
public class SuperDirective implements TemplateDirectiveModel {
    public final static String DIRECTIVE_NAME = "super";

    @SuppressWarnings("rawtypes")
    @Override
    public void execute(Environment env,
                        Map params, TemplateModel[] loopVars,
                        TemplateDirectiveBody body) throws TemplateException, IOException {

        TemplateDirectiveBodyOverrideWraper current =
                (TemplateDirectiveBodyOverrideWraper) env.getVariable(DirectiveKit.OVERRIDE_CURRENT_NODE);
        if (current == null) {
            throw new TemplateException("<@super/> direction must be child of override", env);
        }
        TemplateDirectiveBody parent = current.parentBody;
        if (parent == null) {
            throw new TemplateException("not found parent for <@super/>", env);
        }
        parent.render(env.getOut());

    }
}