TemplateEngineFreemarkerAuthenticityFormDirective.java

package ninja.template.directives;

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

import ninja.Context;
import ninja.utils.NinjaConstant;
import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;


@SuppressWarnings("rawtypes")
public class TemplateEngineFreemarkerAuthenticityFormDirective implements TemplateDirectiveModel {
    private Context context;

    public TemplateEngineFreemarkerAuthenticityFormDirective(Context context) {
        this.context = context;
    }
    
    @Override
    public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body) throws TemplateException, IOException {
        if (!params.isEmpty()) {
            throw new TemplateModelException("This directive doesn't allow parameters.");
        }

        if (loopVars.length != 0) {
            throw new TemplateModelException("This directive doesn't allow loop variables.");
        }

        Writer out = env.getOut();
        out.append("<input type=\"hidden\" value=\"" + context.getSession().getAuthenticityToken() + "\" name=\"" + NinjaConstant.AUTHENTICITY_TOKEN +  "\" />");
    }
}