org.twinkql.template.AbstractTwinkqlTemplateFactory.java Source code

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Here is the source code for org.twinkql.template.AbstractTwinkqlTemplateFactory.java

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/*
 * Copyright: (c) 2004-2012 Mayo Foundation for Medical Education and 
 * Research (MFMER). All rights reserved. MAYO, MAYO CLINIC, and the
 * triple-shield Mayo logo are trademarks and service marks of MFMER.
 *
 * Except as contained in the copyright notice above, or as used to identify 
 * MFMER as the author of this software, the trade names, trademarks, service
 * marks, or product names of the copyright holder shall not be used in
 * advertising, promotion or otherwise in connection with this software without
 * prior written authorization of the copyright holder.
 *
 * 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.twinkql.template;

import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.GenericApplicationContext;
import org.twinkql.context.TwinkqlContext;

/**
 * A factory for creating TwinkqlTemplate objects.
 */
public abstract class AbstractTwinkqlTemplateFactory {

    private static String PACKAGE_SCAN = "org.twinkql";

    /* (non-Javadoc)
     * @see org.springframework.beans.factory.FactoryBean#getObject()
     */
    /**
     * Gets the twinkql template.
     *
     * @return the twinkql template
     * @throws Exception the exception
     */
    public TwinkqlTemplate getTwinkqlTemplate() {

        DefaultListableBeanFactory parentBeanFactory = new DefaultListableBeanFactory();

        parentBeanFactory.registerSingleton("twinkqlContext", this.getTwinkqlContext());

        GenericApplicationContext parentContext = new GenericApplicationContext(parentBeanFactory);

        parentContext.refresh();

        AnnotationConfigApplicationContext annotationConfigApplicationContext = this
                .decorateContext(new AnnotationConfigApplicationContext());
        annotationConfigApplicationContext.setParent(parentContext);
        annotationConfigApplicationContext.scan(PACKAGE_SCAN);
        annotationConfigApplicationContext.refresh();

        TwinkqlTemplate template = annotationConfigApplicationContext.getBean(TwinkqlTemplate.class);

        return template;
    }

    /**
     * Gets the twinkql context.
     *
     * @return the twinkql context
     */
    protected abstract TwinkqlContext getTwinkqlContext();

    /**
     * Decorate context.
     *
     * @param applicationContext the application context
     * @return the annotation config application context
     */
    protected AnnotationConfigApplicationContext decorateContext(
            AnnotationConfigApplicationContext applicationContext) {
        //for subclasses
        return applicationContext;
    }

}