net.sourceforge.jabm.spring.BeanFactorySingleton.java Source code

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Here is the source code for net.sourceforge.jabm.spring.BeanFactorySingleton.java

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/*
 * JABM - Java Agent-Based Modeling Toolkit
 * Copyright (C) 2013 Steve Phelps
 *
 * 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.
 */
package net.sourceforge.jabm.spring;

import java.util.Properties;

import net.sourceforge.jabm.util.SystemProperties;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.annotation.RequiredAnnotationBeanPostProcessor;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;

public class BeanFactorySingleton {

    protected static DefaultListableBeanFactory beanFactory;

    public static synchronized BeanFactory getBeanFactory() {
        if (beanFactory == null) {
            initialiseFactory();
        }
        return beanFactory;
    }

    public static synchronized void registerFactory(DefaultListableBeanFactory beanFactory) {
        BeanFactorySingleton.beanFactory = beanFactory;
    }

    public static Object getBean(String id) {
        return getBeanFactory().getBean(id);
    }

    public static void initialiseFactory(Resource resource) {

        beanFactory = new DefaultListableBeanFactory();

        XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(beanFactory);
        reader.loadBeanDefinitions(resource);

        // Caching must be disabled for
        // net.sourceforge.jabm.init.RandomVariateSimulationInitialiser
        beanFactory.setCacheBeanMetadata(false);
        beanFactory.addBeanPostProcessor(new RequiredAnnotationBeanPostProcessor());

        // Register the custom simulation scope
        beanFactory.registerScope(SimulationScope.ATTRIBUTE_VALUE, SimulationScope.getSingletonInstance());
    }

    public static void initialiseFactory() {
        Properties systemProperties = SystemProperties.jabsConfiguration();
        String configFile = systemProperties.getProperty(SystemProperties.PROPERTY_CONFIG);
        if (configFile == null) {
            throw new IllegalArgumentException("Must specify a configuration file by setting the system property "
                    + SystemProperties.PROPERTY_BASE + "." + SystemProperties.PROPERTY_CONFIG);
        }
        initialiseFactory(new FileSystemResource(configFile));
    }

}