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/*
 *    Copyright 2021 wwy
 *
 *    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.gitee.cn9750wang.webtools.query.empty;

import com.gitee.cn9750wang.webtools.query.LimitPage;

/**
 * LimitPage为空时的默认值
 *
 * @author wwy
 */
public final class EmptyLimitPage extends LimitPage {

    private static EmptyLimitPage page;

    private EmptyLimitPage(long page) {
        super(page);
    }

    /**
     * 获取实例
     * @return EmptyLimitPage实例
     */
    public static EmptyLimitPage getInstance(){
        if(page == null){
            synchronized (EmptyLimitPage.class){
                if (page == null){
                    page = new EmptyLimitPage(1);
                }
            }
        }
        return page;
    }


    @Override
    public final LimitPage rationalization() {
        return this;
    }

    @Override
    public final LimitPage rationalization(long maxSize) {
        return this;
    }

    @Override
    public final LimitPage xlsMaxRow() {
        return this;
    }

    @Override
    public final LimitPage xlsxMaxRow() {
        return this;
    }


}