T2Framework の View 部分にFreeMarker を使う(2) Navigation自作編(I)

一昨日のエントリでT2Frameworkコミッタのid:shot6さんにコメントを頂いたので
自分でもNavigation拡張を行ってみた。
　

FreeMarker用拡張Navigationクラス

package test.navigation;
import java.io.PrintWriter;

import java.util.HashMap;

import java.util.Map;
import org.t2framework.commons.util.Logger;

import org.t2framework.t2.contexts.WebContext;

import org.t2framework.t2.navigation.Forward;

import org.t2framework.t2.navigation.WebNavigation;
import freemarker.template.Template;
public class FTLNavigation extends WebNavigation {
    @SuppressWarnings("unused")

    private static Logger logger = Logger.getLogger(Forward.class);

 

    protected Template template;

    protected Map<String, Object> root = new HashMap<String, Object>();

     

    public FTLNavigation(Template template) {

        this.template = template;

    }

      

    public static FTLNavigation getNavigation(Template template) {

        return new FTLNavigation(template);  

    }

    

    public Template getTemplate(){

        return this.template;

    }

     

    public FTLNavigation setEncoding(String encoding){

        this.template.setEncoding(encoding);

        return this;

    }
    public String getEncoding(){

        return this.template.getEncoding();

    }

     

    public FTLNavigation setRoot(Map<String, Object> root) {

        this.root = root;

        return this;

    } 

     

    public FTLNavigation put(String key, Object value) {

        this.root.put(key, value);

        return this;

    }

     

    @Override

    public void execute(WebContext context) throws Exception {

        String encoding = template.getEncoding();

        if (encoding != null)

            context.getResponse().setContentType("text/html; charset=" + encoding);

         

        PrintWriter out = context.getResponse().getNativeResource().getWriter();

        template.process(root, out);

    }

}

　

Pageクラス

package test.page;

import org.t2framework.commons.annotation.composite.RequestScope;

import org.t2framework.commons.util.Logger;

import org.t2framework.t2.annotation.core.Default;

import org.t2framework.t2.annotation.core.Page;

import org.t2framework.t2.annotation.core.RequestParam;

import org.t2framework.t2.spi.Navigation;
import test.navigation.FTLNavigation;

import freemarker.template.Configuration;

import freemarker.template.DefaultObjectWrapper;

import freemarker.template.Template;
@Page("/view")

@RequestScope

public class ViewPage {

    @SuppressWarnings("unused")

    private static Logger logger = Logger.getLogger(ViewPage.class);

    @Default

    public Navigation view(@RequestParam("p") String p) throws Exception{
        Configuration config = new Configuration();

        config.setObjectWrapper(new DefaultObjectWrapper());

        Template template = config.getTemplate("WEB-INF/html/view.html");
        return FTLNavigation.getNavigation(template)

                            .setEncoding("utf-8")

                            .put("message", p);

    }

}

　
結構簡単に拡張できるのでいい感じ。
Navigationクラスの名前に困った・・
しっくりくるのが思いつかない。
　
追記：
Printwriterのcloseはコンテナに任せたほうがいいので修正。