//

// Source code recreated from a .class file by IntelliJ IDEA

// (powered by Fernflower decompiler)

//

import java.util.Collections;

import java.util.List;

import org.apache.commons.lang.StringUtils;

public class Page<T> {

    /*静态变量，用于设置结果是按照正序排列还是反序排列*/

    public static final String ASC = "asc";

    public static final String DESC = "desc";

    /*当前页码*/

    protected int pageNo = 1;

     /*页面容量*/

    protected int pageSize = 1;

    /*orderBy表示通过那个进行排序，比如说：id*/

    protected String orderBy = null;

    /*order是设置以哪种方式进行排序：可以使ASC也可以是DESC*/

    protected String order = null;

    /*只是是否自动计算*/

    protected boolean autoCount = true;

    /*以下2个参数常作为 分页所需的"返回结果"! */

    //result表示当页面存在的实体类集合。

    protected List<T> result = Collections.emptyList();

    //totalCount表示当前页面总条数。

    protected long totalCount = -1L;

    public Page() {

    }

    public Page(int pageSize) {

        this.setPageSize(pageSize);

    }

    public Page(int pageSize, boolean autoCount) {

        this.setPageSize(pageSize);

        this.setAutoCount(autoCount);

    }

    public int getPageNo() {

        return this.pageNo;

    }

    public void setPageNo(int pageNo) {

        this.pageNo = pageNo;

        if(pageNo < 1) {

            this.pageNo = 1;

        }

    }

    public int getPageSize() {

        return this.pageSize;

    }

    public void setPageSize(int pageSize) {

        this.pageSize = pageSize;

        if(pageSize < 0) {

            this.pageSize = 1;

        }

    }

    /**

     * 获得当前页面第一条数据的排列

     * @return

     */

    public int getFirst() {

        return (this.pageNo - 1) * this.pageSize + 1;

    }

    public String getOrderBy() {

        return this.orderBy;

    }

    public void setOrderBy(String orderBy) {

        this.orderBy = orderBy;

    }

    public boolean isOrderBySetted() {

        return StringUtils.isNotBlank(this.orderBy) && StringUtils.isNotBlank(this.order);

    }

    public String getOrder() {

        return this.order;

    }

    public void setOrder(String order) {

        String[] orders = StringUtils.split(StringUtils.lowerCase(order), ',');

        String[] var6 = orders;

        int var5 = orders.length;

        for(int var4 = 0; var4 < var5; ++var4) {

            String orderStr = var6[var4];

            if(!StringUtils.equals("desc", orderStr) && !StringUtils.equals("asc", orderStr)) {

                throw new IllegalArgumentException("排序方向" + orderStr + "不是合法值");

            }

        }

        this.order = StringUtils.lowerCase(order);

    }

    public boolean isAutoCount() {

        return this.autoCount;

    }

    public void setAutoCount(boolean autoCount) {

        this.autoCount = autoCount;

    }

    public List<T> getResult() {

        return this.result;

    }

    public void setResult(List<T> result) {

        this.result = result;

    }

    public long getTotalCount() {

        return this.totalCount;

    }

    public void setTotalCount(long totalCount) {

        this.totalCount = totalCount;

    }

    /**

     * 获取一共有多少页（设置的是总条数）

     * @return

     */

    public long getTotalPages() {

        if(this.totalCount < 0L) {

            return -1L;

        } else {

            long count = this.totalCount / (long)this.pageSize;

            if(this.totalCount % (long)this.pageSize > 0L) {

                ++count;

            }

            return count;

        }

    }

    /**

     * 是否还有下一页

     * @return

     */

    public boolean isHasNext() {

        return (long)(this.pageNo + 1) <= this.getTotalPages();

    }

    /**

     * 得到下一页的页码

     * @return

     */

    public int getNextPage() {

        return this.isHasNext()?this.pageNo + 1:this.pageNo;

    }

    /**

     * 是否有上一页

     * @return

     */

    public boolean isHasPre() {

        return this.pageNo - 1 >= 1;

    }

    /**

     * 得到上一页页码

     * @return

     */

    public int getPrePage() {

        return this.isHasPre()?this.pageNo - 1:this.pageNo;

    }

}