admin-api/src/main/java/com/gzzn/omms/adminapi/dto/PageInfoDto.java

package com.gzzn.omms.adminapi.dto;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

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

import com.github.pagehelper.Page;
/**
 * 
 * @author yinsh
 * @Description: 分页参数
 * @date 2018年1月12日 下午2:34:16 
 * @param <T>
 */
@ApiModel(value="PageInfoDto",description="Api返回分页Dto")
public class PageInfoDto<T> implements Serializable {
    private static final long serialVersionUID = 1L;
    @ApiModelProperty(value="当前页",example="1")
    private int pageNum=1;
    @ApiModelProperty(value="每页的数量",example="10")
    private int pageSize=10;
    @ApiModelProperty(value="总记录数",example="10")
    private long total;
    @ApiModelProperty(value="总页数",example="1")
    private int pages;
    //结果集
    private List<T> list;
    //是否为第一页
    @ApiModelProperty(hidden=true)
    private boolean isFirstPage = false;
    //是否为最后一页
    @ApiModelProperty(hidden=true)
    private boolean isLastPage = false;


    public PageInfoDto() {
    }

    /**
     * 包装Page对象
     *
     * @param list
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
	public PageInfoDto(List<T> list) {
        if (list instanceof Page) {
            Page page = (Page) list;
            this.pageNum = page.getPageNum();
            this.pageSize = page.getPageSize();

            this.pages = page.getPages();
            this.list = page;
            this.total = page.getTotal();
        } else if (list instanceof Collection) {
            this.pageNum = 1;
            this.pageSize = list.size();

            this.pages = 1;
            this.list = list;
            this.total = list.size();
        }
        if (list instanceof Collection) {
            //判断页面边界
            judgePageBoudary();
        }
    }

    /**
     * 判定页面边界
     */
    private void judgePageBoudary() {
        isFirstPage = pageNum == 1;
        isLastPage = pageNum == pages;
    }

    public int getPageNum() {
        return pageNum;
    }

    public void setPageNum(int pageNum) {
        this.pageNum = pageNum;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public long getTotal() {
        return total;
    }

    public void setTotal(long total) {
        this.total = total;
    }

    public int getPages() {
        return pages;
    }

    public void setPages(int pages) {
        this.pages = pages;
    }

    public List<T> getList() {
        return list;
    }

    public void setList(List<T> list) {
        this.list = list;
    }

    public boolean isIsFirstPage() {
        return isFirstPage;
    }

    public void setIsFirstPage(boolean isFirstPage) {
        this.isFirstPage = isFirstPage;
    }

    public boolean isIsLastPage() {
        return isLastPage;
    }

    public void setIsLastPage(boolean isLastPage) {
        this.isLastPage = isLastPage;
    }

    @Override
    public String toString() {
        final StringBuffer sb = new StringBuffer("PageInfo{");
        sb.append("pageNum=").append(pageNum);
        sb.append(", pageSize=").append(pageSize);
        sb.append(", total=").append(total);
        sb.append(", pages=").append(pages);
        sb.append(", list=").append(list);
        sb.append(", isFirstPage=").append(isFirstPage);
        sb.append(", isLastPage=").append(isLastPage);
        sb.append(", navigatepageNums=");
        sb.append('}');
        return sb.toString();
    }
}