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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;

import java.io.Serializable;

/**
 * 分页对象
 * @author renhui
 *
 */
public class Pager implements Serializable{
	
	private Bean[] currentBeans;//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
	
	private static final int DEFAULT_LIMIT=10;
	
	public Pager(int totalCount,int start,Bean[] beans){
		this(totalCount, start, DEFAULT_LIMIT, beans);
	}
	
    public Pager(int totalCount,int start,int limit,Bean[] beans){
		this.currentBeans=beans;
		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;
        }
        this.limit=limit;
        this.start=start;
        this.totalPages=totalCount%limit==0?totalCount/limit:totalCount/limit+1;
        this.currentPage=start%limit==0?start/limit:start/limit+1;
        if(currentPage>totalPages){
        	currentPage=totalPages;
        }
    }

	public Bean[] getCurrentBeans() {
		return currentBeans;
	}

	public void setCurrentBeans(Bean[] currentBeans) {
		this.currentBeans = currentBeans;
	}

	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;
	}
}