com.jfinal.plugin.activerecord.OrderedFieldContainerFactory Maven / Gradle / Ivy

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/**
 * Copyright (c) 2011-2017, 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.plugin.activerecord;

import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

/**
 * 用于支持查询出来的字段次序与 select a, b, c... 的次序一致
 * 
 * 通常用于查询类系统，字段是不确定的，字段显示的次序要与 select
 * 字句保持一致
 * 
 * 用法：
 * arp.setContainerFactory(new OrderedFieldContainerFactory())
 */
@SuppressWarnings({"rawtypes", "unchecked"})
public class OrderedFieldContainerFactory implements IContainerFactory {
	
	public Map getAttrsMap() {
		return new LinkedHashMap();
	}
	
	public Map getColumnsMap() {
		return new LinkedHashMap();
	}
	
	public Set getModifyFlagSet() {
		return new HashSet();
	}
}