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/*******************************************************************************
 * Copyright 2013-2014 Gengyu Shi
 * 
 * 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 com.shigengyu.hyperion.cache;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Service;

import com.google.common.cache.CacheLoader;
import com.shigengyu.common.StringMessage;
import com.shigengyu.hyperion.core.TransitionCondition;
import com.shigengyu.hyperion.core.TransitionConditionException;

@Service
public class TransitionConditionClassLoader extends
		CacheLoader, TransitionCondition> implements ApplicationContextAware {

	private ApplicationContext applicationContext;

	@Override
	public TransitionCondition load(Class key) {
		TransitionCondition transitionCondition;
		try {
			transitionCondition = key.newInstance();
		}
		catch (InstantiationException | IllegalAccessException e) {
			throw new TransitionConditionException(StringMessage.with(
					"Failed to create transition condition instance of type [{}]", key.getName()), e);
		}
		applicationContext.getAutowireCapableBeanFactory().autowireBean(transitionCondition);
		return transitionCondition;
	}

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