pt.webdetails.cdc.bean.factory.CoreBeanFactory.java Source code

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Here is the source code for pt.webdetails.cdc.bean.factory.CoreBeanFactory.java

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/*!
* Copyright 2002 - 2014 Webdetails, a Pentaho company.  All rights reserved.
*
* This software was developed by Webdetails and is provided under the terms
* of the Mozilla Public License, Version 2.0, or any later version. You may not use
* this file except in compliance with the license. If you need a copy of the license,
* please go to  http://mozilla.org/MPL/2.0/. The Initial Developer is Webdetails.
*
* Software distributed under the Mozilla Public License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or  implied. Please refer to
* the license for the specific language governing your rights and limitations.
*/

package pt.webdetails.cdc.bean.factory;

import java.net.URL;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.net.URL;

public class CoreBeanFactory implements ICdcBeanFactory {

    public static final String CDC_SPRING_BEAN = "cdc.spring.xml";

    private static final Log logger = LogFactory.getLog(CoreBeanFactory.class);

    protected static ConfigurableApplicationContext context;

    public CoreBeanFactory() {
        context = getSpringBeanFactory(CDC_SPRING_BEAN);
    }

    public CoreBeanFactory(String config) {
        context = getSpringBeanFactory(config);
    }

    @Override
    public Object getBean(String id) {
        if (context.containsBean(id)) {
            return context.getBean(id);
        }
        return null;
    }

    @Override
    public boolean containsBean(String id) {
        if (context != null) {
            return context.containsBean(id);
        }
        return false;
    }

    @Override
    public String[] getBeanNamesForType(@SuppressWarnings("rawtypes") Class clazz) {
        return context.getBeanNamesForType(clazz);
    }

    protected ConfigurableApplicationContext getSpringBeanFactory(String config) {
        try {
            final ClassLoader cl = this.getClass().getClassLoader();
            URL url = cl.getResource(config);
            if (url != null) {
                logger.debug("Found spring file @ " + url); //$NON-NLS-1$
                ConfigurableApplicationContext context = new ClassPathXmlApplicationContext(config) {
                    @Override
                    protected void initBeanDefinitionReader(XmlBeanDefinitionReader beanDefinitionReader) {

                        beanDefinitionReader.setBeanClassLoader(cl);
                    }

                    @Override
                    protected void prepareBeanFactory(ConfigurableListableBeanFactory clBeanFactory) {
                        super.prepareBeanFactory(clBeanFactory);
                        clBeanFactory.setBeanClassLoader(cl);
                    }

                    /**
                     * Critically important to override this and return the desired
                     * CL
                     **/
                    @Override
                    public ClassLoader getClassLoader() {
                        return cl;
                    }
                };
                return context;
            }
        } catch (Exception e) {
            logger.fatal("Error loading " + CDC_SPRING_BEAN, e);
        }
        logger.fatal(
                "Spring definition file does not exist. There should be a <plugin_name>.spring.xml file on the classpath ");
        return null;

    }
}