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JFinal is a simple, light, rapid,independent, extensible Java WEB + ORM framework. The feature of JFinal looks like ruby on rails especially ActiveRecord.

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/**
 * Copyright (c) 2011-2019, James Zhan 詹波 ([email protected]).
 *
 * 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.jfinal.core;

import java.util.HashMap;
import java.util.Map;

/**
 * FastControllerFactory
 */
public class FastControllerFactory extends ControllerFactory {
	
	private ThreadLocal, Controller>> buffers = new ThreadLocal, Controller>>() {
		protected Map, Controller> initialValue() {
			return new HashMap, Controller>();
		}
	};
	
	public Controller getController(Class controllerClass) throws InstantiationException, IllegalAccessException {
		Controller ret = buffers.get().get(controllerClass);
		if (ret == null) {
			ret = controllerClass.newInstance();
			buffers.get().put(controllerClass, ret);
		}
		return ret;
	}
}