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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.tinysqldsl;

import java.io.Serializable;
import java.util.List;

/**
 * 分页对象
 * @author renhui
 *
 */
public class Pager implements Serializable {

    private static final int DEFAULT_LIMIT = 10;
    private List records;//当前页的记录
    private int totalCount;//总记录数
    private int currentPage;//当前页
    private int limit;//每页记录数
    private int start;//开始记录数
    private int totalPages;//总页数

    public Pager(int totalCount, int start, List records) {
        this(totalCount, start, DEFAULT_LIMIT, records);
    }

    public Pager(int totalCount, int start, int limit, List records) {
        this.records = records;
        init(totalCount, start, limit);
    }

    private void init(int totalCount, int start, int limit) {
        //设置基本参数
        this.totalCount = totalCount;
        if (limit == 0) {
            limit = DEFAULT_LIMIT;
        }
        if (start < 0) {//如果传人参数是小于0，那么设置为0
            start = 0;
        }
        this.limit = limit;
        this.start = start;
        this.totalPages = totalCount % limit == 0 ? totalCount / limit : totalCount / limit + 1;
        this.currentPage = start / limit == 0 ? 1 : start / limit + 1;
        if (currentPage > totalPages) {
            currentPage = totalPages;
        }
    }

    public List getRecords() {
        return records;
    }

    public void setRecords(List records) {
        this.records = records;
    }

    public int getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    public int getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        this.limit = limit;
    }

    public int getStart() {
        return start;
    }

    public void setStart(int start) {
        this.start = start;
    }

    public int getTotalPages() {
        return totalPages;
    }

    public void setTotalPages(int totalPages) {
        this.totalPages = totalPages;
    }
}