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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.common.spring.factory;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.config.AbstractFactoryBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public abstract class AbstractAutowiringFactoryBean extends AbstractFactoryBean implements ApplicationContextAware {

    private ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(final ApplicationContext applicationContext) {
        this.applicationContext = applicationContext;
    }

    @Override
    protected final T createInstance() throws Exception {
        final T instance = doCreateInstance();
        if (instance != null) {
            applicationContext.getAutowireCapableBeanFactory().autowireBean(instance);

            if (instance instanceof ApplicationContextAware) {
                ((ApplicationContextAware) instance).setApplicationContext(applicationContext);
            }

            if (instance instanceof InitializingBean) {
                ((InitializingBean) instance).afterPropertiesSet();
            }
        }
        return instance;
    }

    /**
     * Create the bean instance.
     *
     * @see #createInstance()
     */
    protected abstract T doCreateInstance() throws Exception;
}