com.technologicaloddity.saha.util.AjaxPageRendererImpl.java Source code

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Here is the source code for com.technologicaloddity.saha.util.AjaxPageRendererImpl.java

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/**
 * (c) 2010 Technological Oddity
 *     http://technologicaloddity.com
 *
 * I, Bob Robinson, the author of this work hereby release it
 * under the Creative Commons-By Attribution 3.0 license for
 * both commercial and non-commercial purposes.
 * See the license at:
 * http://creativecommons.org/licenses/by/3.0/
 */
package com.technologicaloddity.saha.util;

import java.io.StringWriter;
import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.directwebremoting.util.SwallowingHttpServletResponse;
import org.springframework.beans.PropertyAccessor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.*;
import org.springframework.web.servlet.tags.NestedPathTag;
import org.springframework.web.servlet.tags.form.FormTag;

/**
 * @author Bob Robinson, http://technologicaloddity.com
 *
 */
@Component
public class AjaxPageRendererImpl implements SpringAwareAjaxPageRenderer {
    @Autowired
    private LocaleResolver localeResolver;
    @Autowired
    private ViewResolver viewResolver;

    public String render(ModelAndView modelAndView, HttpServletRequest request, HttpServletResponse response) {
        String result = null;

        StringWriter sout = new StringWriter();
        StringBuffer buffer = sout.getBuffer();

        HttpServletResponse fakeResponse = new SwallowingHttpServletResponse(response, sout,
                response.getCharacterEncoding());

        Locale locale = this.localeResolver.resolveLocale(request);
        fakeResponse.setLocale(locale);

        request.setAttribute(DispatcherServlet.LOCALE_RESOLVER_ATTRIBUTE, this.localeResolver);
        try {
            View view = viewResolver.resolveViewName(modelAndView.getViewName(), locale);
            view.render(modelAndView.getModel(), request, fakeResponse);
            result = buffer.toString();
        } catch (Exception e) {
            result = "Ajax render error:" + e.getMessage();
        }
        return result;
    }

    public String renderWithNestedModel(ModelAndView modelAndView, HttpServletRequest request,
            HttpServletResponse response, String nestedModelAttributeName) {
        request.setAttribute(FormTag.MODEL_ATTRIBUTE_VARIABLE_NAME, nestedModelAttributeName);
        request.setAttribute(NestedPathTag.NESTED_PATH_VARIABLE_NAME,
                nestedModelAttributeName + PropertyAccessor.NESTED_PROPERTY_SEPARATOR);
        return render(modelAndView, request, response);
    }

}