org.jdal.beans.AppCtx.java Source code

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Here is the source code for org.jdal.beans.AppCtx.java

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/*
 * Copyright 2008-2010 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 org.jdal.beans;

import java.util.Properties;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySource;

/**
 * Minimalistic singleton with application context
 * 
 * @author Jose Luis Martin
 * @since 1.0
 */
public class AppCtx {

    /** spring application context */
    private static ClassPathXmlApplicationContext context = null;
    /** init properties */
    private static PropertySource<?> propertySource;
    private static String config;

    /** 
     * Search on classpath for context definition files and return the application context
     * @return the ApplicationContext
     */
    public synchronized static ApplicationContext getInstance() {
        if (context == null) {
            context = new ClassPathXmlApplicationContext();
            if (propertySource != null) {
                context.getEnvironment().getPropertySources().addFirst(propertySource);
            }
            String location = "classpath*:/" + (config != null ? config + "/" : "") + "applicationContext*.xml";
            context.setConfigLocation(location);
            context.refresh();
        }

        return context;
    }

    public synchronized static void setProperties(String name, Properties properties) {
        propertySource = new PropertiesPropertySource(name, properties);
    }

    public static void setConfigPackage(String config) {
        AppCtx.config = config;
    }
}