/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource All rights reserved.
 *
 * 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 br.com.caelum.vraptor.core;

import java.util.LinkedList;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import br.com.caelum.vraptor.interceptor.InterceptorRegistry;

/**
 * Cache all instances of {@link InterceptorHandler} when application starts.
 */
@ApplicationScoped
public class InterceptorStackHandlersCache {

	private final LinkedList<InterceptorHandler> interceptorHandlers = new LinkedList<>();
	private final InterceptorRegistry registry;
	private final InterceptorHandlerFactory handlerFactory;

	private final Logger logger = LoggerFactory.getLogger(InterceptorStackHandlersCache.class);

	/** 
	 * @deprecated CDI eyes only
	 */
	protected InterceptorStackHandlersCache() {
		this(null, null);
	}

	@Inject
	public InterceptorStackHandlersCache(InterceptorRegistry registry, InterceptorHandlerFactory handlerFactory){
		this.registry = registry;
		this.handlerFactory = handlerFactory;
	}

	public void init() {
		for (Class<?> interceptor : registry.all()) {
			logger.debug("Caching {} ", interceptor.getName());
			InterceptorHandler handlerFor = handlerFactory.handlerFor(interceptor);
			this.interceptorHandlers.addLast(handlerFor);
		}
	}

	public LinkedList<InterceptorHandler> getInterceptorHandlers() {
		return new LinkedList<>(interceptorHandlers);
	}

}