com.github.instaweb.jade.web.JadeViewResolver.java Source code

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Here is the source code for com.github.instaweb.jade.web.JadeViewResolver.java

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/*
 * Copyright 2012-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.instaweb.jade.web;

import java.io.IOException;
import java.util.Locale;

import org.springframework.beans.propertyeditors.LocaleEditor;
import org.springframework.core.io.Resource;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.view.UrlBasedViewResolver;

import de.neuland.jade4j.JadeConfiguration;
import de.neuland.jade4j.template.JadeTemplate;

/**
 * @author Marlon Bernardes
 *
 */
public class JadeViewResolver extends UrlBasedViewResolver {

    private JadeConfiguration jadeConfiguration;

    public JadeViewResolver() {
        setViewClass(JadeView.class);
    }

    public void setJadeConfiguration(JadeConfiguration jadeConfiguration) {
        this.jadeConfiguration = jadeConfiguration;
    }

    @Override
    protected View loadView(String viewName, Locale locale) throws Exception {
        String resource = resolveResource(viewName, locale);
        if (resource == null) {
            return null;
        }
        JadeView view = new JadeView(jadeConfiguration, createTemplate(resource));
        view.setApplicationContext(getApplicationContext());
        view.setServletContext(getServletContext());
        return view;
    }

    private JadeTemplate createTemplate(String resource) throws IOException {
        return jadeConfiguration.getTemplate(resource);
    }

    private String resolveResource(String viewName, Locale locale) {
        String l10n = "";
        if (locale != null) {
            LocaleEditor localeEditor = new LocaleEditor();
            localeEditor.setValue(locale);
            l10n = "_" + localeEditor.getAsText();
        }
        return resolveFromLocale(viewName, l10n);
    }

    private String resolveFromLocale(String viewName, String locale) {
        String name = getPrefix() + viewName + locale + getSuffix();
        Resource resource = getApplicationContext().getResource(name);
        if (resource == null || !resource.exists()) {
            if (locale.isEmpty()) {
                return null;
            }
            int index = locale.lastIndexOf("_");
            return resolveFromLocale(viewName, locale.substring(0, index));
        }
        return name;
    }

}