org.craftercms.engine.util.spring.ApplicationContextAccessor.java Source code

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Here is the source code for org.craftercms.engine.util.spring.ApplicationContextAccessor.java

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/*
 * Copyright (C) 2007-2013 Crafter Software Corporation.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.craftercms.engine.util.spring;

import org.craftercms.engine.service.context.SiteContext;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * Bean that provide simple access to the Spring application context's beans: first it uses the site's own context.
 * If not specified, it uses the default context. Used for example to access Spring beans from an FTL or a Groovy
 * script.
 *
 * @author Alfonso Vsquez
 */
public class ApplicationContextAccessor implements ApplicationContextAware {

    private ApplicationContext defaultApplicationContext;

    public ApplicationContextAccessor() {
    }

    public ApplicationContextAccessor(ApplicationContext defaultApplicationContext) {
        this.defaultApplicationContext = defaultApplicationContext;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.defaultApplicationContext = applicationContext;
    }

    public Object get(String beanName) {
        return getApplicationContext().getBean(beanName);
    }

    public <T> T get(String beanName, Class<T> requiredType) {
        return getApplicationContext().getBean(beanName, requiredType);
    }

    protected ApplicationContext getApplicationContext() {
        SiteContext siteContext = SiteContext.getCurrent();
        if (siteContext != null) {
            ApplicationContext applicationContext = siteContext.getApplicationContext();
            if (applicationContext != null) {
                return applicationContext;
            }
        }

        return defaultApplicationContext;
    }

}