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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.tinydb.sql;

import org.tinygroup.beancontainer.BeanContainerFactory;
import org.tinygroup.commons.tools.CollectionUtil;
import org.tinygroup.tinydb.sql.condition.ConditionGenerater;
import org.tinygroup.tinydb.sql.condition.impl.EqualsConditionGenerater;
import org.tinygroup.tinydb.sql.group.GroupGenerater;
import org.tinygroup.tinydb.sql.group.impl.DefaultGroupGenerater;
import org.tinygroup.tinydb.sql.order.OrderGenerater;
import org.tinygroup.tinydb.sql.order.impl.AscOrderGenerater;
import org.tinygroup.tinydb.sql.order.impl.DescOrderGenerater;

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

/**
 * 存放sql生成片段的实例的容器，例如条件、分组、排序的片段
 * 
 * @author renhui
 * 
 */
public class SQLGenerateContainer {

	private Map conditionModeMap = new HashMap();

	private Map orderModeMap = new HashMap();

	private GroupGenerater generater = new DefaultGroupGenerater();

	public void initContainer() {
		Collection conditionModes = BeanContainerFactory
				.getBeanContainer(this.getClass().getClassLoader()).getBeans(
						ConditionGenerater.class);
		if (!CollectionUtil.isEmpty(conditionModes)) {
			for (ConditionGenerater conditionMode : conditionModes) {
				conditionModeMap.put(conditionMode.getConditionMode(),
						conditionMode);
			}
		} else {// 默认注册equals的条件表达式
			ConditionGenerater equasl = new EqualsConditionGenerater();
			conditionModeMap.put(equasl.getConditionMode(), equasl);
		}

		Collection orderModes = BeanContainerFactory
				.getBeanContainer(this.getClass().getClassLoader()).getBeans(
						OrderGenerater.class);
		if (!CollectionUtil.isEmpty(orderModes)) {
			for (OrderGenerater orderGenerater : orderModes) {
				orderModeMap.put(orderGenerater.getOrderMode(), orderGenerater);
			}
		} else {// 注册asc与desc
		     OrderGenerater asc=new AscOrderGenerater();
		     orderModeMap.put(asc.getOrderMode(),asc);
		     DescOrderGenerater desc=new DescOrderGenerater();
		     orderModeMap.put(desc.getOrderMode(), desc);
		}

	}

	public ConditionGenerater getConditionGenerater(String conditionMode) {
		return conditionModeMap.get(conditionMode);
	}

	public OrderGenerater getOrderGenerater(String orderMode) {
		return orderModeMap.get(orderMode);
	}

	public GroupGenerater getGroupGenerater() {
		return generater;
	}
}